Wang Qinghua, Dong Yanxiang and Zheng Wen

(Zhejiang Geological Survey Institute, Xiaoshan 311203)

Abstract: The agricultural geological environment survey of Zhejiang Province is based on investigation and evaluation. With this center and research as the link, investigations, research and evaluation of Zhejiang's agricultural geological environment have been carried out at different levels, levels and scales, and a large number of important investigation and research results, demonstrative results and applied results have been obtained, which has greatly enriched the Basic agricultural data in our province have increased the technical reserves of agricultural geology. These results can not only provide technical support for Zhejiang's agricultural zoning, agricultural structure adjustment, and the development of efficient ecological agriculture, but also provide basic services for the construction of Zhejiang's "ecological province" and the sustainable development strategy of agriculture.

Keywords: Zhejiang Province; Agricultural Geological Environment Survey; Work Results

The "Zhejiang Agricultural Geological Environment Survey" is jointly carried out by the Zhejiang Provincial People's Government and the China Geological Survey of the Ministry of Land and Resources A basic and public welfare geological survey project. Zhejiang Province is also the first province in the country to carry out agricultural geological work in the form of provincial-ministerial cooperation. The project united 18 units (departments) inside and outside the province, gathered more than 180 experts from multiple disciplines and professions, invested a huge amount of physical work, obtained more than 1.26 million high-precision measured data, and compiled thousands of Various drawings. Through the implementation of this project, the new situation of land quality in the main agricultural economic zones of our province was identified, the new advantages of certain land resources were basically grasped, the new trend of changes in the agricultural geological environment was initially revealed, and the province's agricultural geology was established for the first time. The new platform supported by environmental technology has expanded the new field of shallow beach geological environmental quality investigation.

1 Overview of results

The total survey area actually completed by the Zhejiang Province Agricultural Geological Environment Survey Project is 43,613km2, of which the land survey area is

37,737km2, and the coastal beach And the offshore shallow sea survey area is 5876km2.

A huge amount of physical work was invested in this work. 408 soil geological columnar profiles and 1,354km of soil geochemical profiles were measured and 66,554 samples of soil, shallow sea sediments, shallow groundwater, crops, etc. were collected, and 70 tests were carried out on the total amount of soil elements, available forms, and persistent organic pollutants. Analysis and testing of multiple indicators, 24 indicators of shallow groundwater, and more than 20 indicators of agricultural products; approximately 1.26 million various test analysis data were obtained, and more than 450 basic maps were compiled.

There are 29 survey and research reports formed by the Zhejiang Province Agricultural Geological Environment Survey, including 5 comprehensive results reports of the total project, 4 basic survey reports, 7 special research reports, and special topic reports. 6 research reports and 7 demonstration area survey reports. 5 sets of atlases: one set each of "Geochemical Atlas" for three regions in northern Zhejiang, central Zhejiang and eastern Zhejiang, "Zhejiang Province Agricultural Geology and Environment Atlas", "Zhejiang Province Ecological Geology and Geochemistry Atlas".

2 Investigation results

2.1 A large amount of high-quality measured data of multiple media, multiple elements, and multiple indicators were obtained, and a series of basic geochemical maps were compiled, which were comprehensively updated and enriched. Zhejiang regional geochemical data constitutes a basic information platform for multi-sector and multi-disciplinary applications

By analyzing three key agricultural planting areas in the plain area of ??northern Zhejiang, the hilly basin area in central Zhejiang and the coastal area in eastern Zhejiang The multi-objective geochemical survey has obtained more than 1.26 million multi-media elemental geochemical analysis and test data, mainly including:

(1) Main soils and soil parent materials Cd, Hg, Cr, Pb in Zhejiang Province Analysis data of 52 elements including Fe, Mn, Cu, Zn and other elements, as well as organic carbon and pH value;

(2) Effective amount analysis data of 12 elements such as Fe, Mn, Cu and Zn in the main soil of Zhejiang Province;

(3) Analytical data of major soil organochlorine (666, DDT) pesticide residues in Zhejiang Province;

(4) Analytical data of major soil organic pollutants (polychlorinated biphenyls, PCBs) in Zhejiang Province;

(5) 24 water quality analysis data such as NO3, NO2, NH4 and other shallow groundwater in the main farmland soil in Zhejiang Province;

(6) Zhejiang Province’s coastal shallow sea and tidal flat sediments Analysis data of 52 elements, organic carbon and pH value.

Using the measured data obtained from regional surveys and in accordance with the requirements of technical specifications, we compiled geochemical maps of 52 elements, distribution maps of effective forms (leachable amounts) of 11 elements, and persistent organic pollutants A large number of basic maps such as distribution maps provide a basis for agricultural geological environment assessment and comprehensive research. On the basis of regional assessment and comprehensive research, the "Zhejiang Province Agricultural Geological Environment Atlas" and "Zhejiang Province Ecological Geochemistry Atlas" were compiled for the first time; these results were obtained since the second agricultural census and the second national geochemical scan. The most systematic, reliable, and latest basic results and massive basic data obtained since then are important data sources for "Digital Zhejiang" and have long-term application value in multiple departments, disciplines, and fields.

2.2 The current status of the geological environment of the main agricultural and economic natural areas in Zhejiang Province was identified, and "finding out the situation" provided scientific basis for the government's macro decision-making

2.2.1 Soil environmental quality Evaluation

The evaluation results show that the soil environmental quality of the three main agricultural planting areas in the northern Zhejiang plain, the eastern Zhejiang coast and the central Zhejiang basin is generally good. The results of the comprehensive evaluation of functional types show that within an area of ??approximately 37,000 km2 in the three investigated areas, Class I soils account for 21.14%, Class II soils account for 61.04%, Class III and Super III soils account for 16.63% and 1.19% respectively. .

Based on the Ministry of Agriculture’s soil environmental quality standards for green food production areas and combined with the province’s land use status data in 1999, the planting suitability evaluation of the soil environmental quality of agricultural land shows that in northern Zhejiang, eastern Zhejiang and central Zhejiang Among the 2.365 million hectares of agricultural land in the three survey areas, the area of ??agricultural land that can meet the soil environmental quality requirements for safe agricultural product production is 1.798 million hectares, accounting for 76.0% of the agricultural land area in the three regions. Among them, 1.479 million hectares of paddy fields are used, accounting for 76.0% of the agricultural land area in the three regions. 74.9% of paddy fields; 257,000 hectares of dry land, accounting for 86.7% of the total dry land area in the three regions; 73,000 hectares of garden land, accounting for 78.6% of the total garden area of ??the three regions. The area of ??non-green agricultural land that is not suitable for growing green agricultural products is 472,000 hectares, accounting for 20.0% of the agricultural land area in the three regions.

2.2.2 Evaluation of Soil Pollution Degree

Affected by industry, agriculture, and cities, the soil in our province has been polluted by heavy metal elements to varying degrees. Statistics from the survey and evaluation results show that in the three coastal areas of northern Zhejiang, central Zhejiang and eastern Zhejiang, the lightly polluted area accounts for 38.1% of the total area of ??the survey area, the moderate pollution accounts for 9.0%, and the severely polluted area accounts for 1.61%.

Research shows that in the process of rapid industrialization, the changes in the content of heavy metal elements in the soil have greatly exceeded the changes in natural processes. In just 12 years, the average content of Cd, Cu, As, S and other elements has The relative accumulation rate reached more than 15%, and elements such as Hg, Cd, Pb, Zn, Cu, and As were enriched in the surface soil of the three regions of the northern Zhejiang plain, the eastern Zhejiang coastal plain, and the central Zhejiang basin. The survey shows that heavy metal pollution is mainly caused by industrial "three wastes" (waste water, waste gas, waste residue), agricultural chemicals such as fertilizers and pesticides, and other man-made effects. It widely enters the soil environment through atmospheric dustfall, irrigation, fertilization, infiltration, etc. .

2.2.3 Evaluation of the Current Situation of Soil Organic Pollution

The survey shows that organochlorine pesticides such as 666 and DDT are still widely remaining in the soil nearly 30 years after they were stopped. Generally speaking, it does not exceed the national environmental quality standards.

2.2.4 Assessment of farmland shallow groundwater environmental quality

The survey showed that the water quality of farmland shallow groundwater in the three key survey areas was mainly Class IV and Class V, among which Class IV water was Accounting for 42.0%, Class V water accounts for 49.2%; Class V water in the coastal areas of eastern Zhejiang reaches 65.7%.

The heavy metal pollution of shallow groundwater is not prominent and is mainly concentrated in indicators such as iron, manganese and nitrite. Among them, the proportion of iron exceeding the standard is 61.8%, manganese is 73.3%, and nitrite is 25.2%.

2.2.5 Evaluation of the abundance and deficiency of nutrients and trace elements in farmland soil

The evaluation results of soil fertility and abundance and deficiency of trace nutrients in the three regions of northern Zhejiang, eastern Zhejiang and central Zhejiang show that the soil nutrients The problem of imbalance between countries is still very prominent. The area of ??soil with poor soil fertility and nutrient richness or balance is close to 50%, with the problem most prominent in central Zhejiang; the proportion of soil with better balance is smaller. In reclamation areas along rivers and seas, soils are generally deficient in Zn, Mo, Cu and other elements; B deficiency is widespread and regional, with 92.2% of soils suffering from B deficiency.

2.2.6 Environmental Quality Assessment of Tidal Flats and Nearshore Shallow Sea Sediments

The survey shows that, except for Ni element which exceeds the standard in the Yueqing Bay area, no obvious heavy metal pollution has been found on the coastal tidal flats. .

2.3 Through investigation, selenium-rich soil in Zhejiang was discovered and evaluated for the first time. This result not only has important scientific research value, but also has resource development value

2.3.1 Selenium-rich soil and evaluation

Through the research, for the first time, it was proposed that the selenium content and selenium content of the soil should be determined based on the selenium content of the soil. The comprehensive evaluation method of selenium-rich soil resources based on indicators such as reactivity, area of ??selenium-rich soil, degree of selenium enrichment in the soil, availability of selenium, soil environmental quality and biological effects, divides selenium-rich soil into higher enrichment ( There are three levels: Level I), moderate enrichment (Level II), and general enrichment (Level III). After evaluation, 29 selenium-rich soil areas of approximately 7,654 km2 were identified in three areas: the North Zhejiang Plain, the East Zhejiang Coastal Plain, and the Central Zhejiang Basin; including 5 Level I areas, 15 Level II areas, and 9 Level III areas. at.

2.3.2 Survey on selenium-rich agricultural products

Through the field investigation and verification of agricultural products in selenium-rich areas, it was newly discovered that rice from Haining, Pinghu, and Zhuji, grapes from Jinhua, Quzhou, Kaihua, and Cixi The selenium content of tea, Longyou Zhitang White Lotus, Ruian Horseshoe Bamboo Shoots, Tianmu Mountain Bamboo Shoots and other agricultural products has reached the standard for labeling selenium-rich agricultural products.

3 Evaluation results

3.1 Soil geology research

Based on geoscience, the new concept of "soil geological unit" was proposed, and the pedogenesis of Zhejiang was systematically divided The parent material type realizes the organic combination of earth science and soil science, which greatly improves the level of soil geology research in Zhejiang.

Taking the geological and geochemical correlation study of "parent rock-parent material-soil" as the starting point, using soil geological profile research and soil parent material chemical classification as the basic method, through systematic research on the agricultural geological background , proposed a new concept of "soil geological unit". Since geological work can accurately determine the spatial distribution of various rocks and strata, and describe in detail the geological environment and geochemical characteristics of their formation, the classification of soil parent material based on geoscience will be more accurate.

Based on the classification principles, 36 soil parent material types were established, 118 soil geological units were divided, and a new Zhejiang soil parent material map was compiled; soil mineralogy, soil magnetism and other aspects were studied for different soil types, starting from soil formation. This article systematically summarizes the geological-geochemical characteristics of soil in Zhejiang Province in terms of parent rock, soil parent material and different pedogenic environments, enriches the basic data of agricultural environment, and is highly scientific and practical.

3.2 Research on the suitable geology and geochemical environment of specialty agricultural products

Based on the investigation and research, a geological and geochemical model of suitable agricultural products in Zhejiang was established to provide scientific guidance. The structural adjustment of specialty agricultural products and regional layout planning provide geological support.

This work conducted a study on the site geological background of seven special agricultural products, including Zhejiang famous tea, bamboo shoots, Lin'an pecans, Zhuji torreya, Changshan pomelo, Yuhuan pomelo, and Changxing ginkgo. The study concluded that: In addition to topography, slope aspect and microclimate conditions, the distribution and quality of specialty agricultural products are obviously restricted and affected by the geological and geochemical background. The research revealed the fitness rules of this type of agricultural products, established a geological-geochemical model of fitness, and followed the epistemology of known to unknown. With the support of information technology, the planting suitability zoning was carried out. The results showed that Zhejiang Province’s high-quality famous The most suitable area for tea planting is 10,803km2 (Figure 1), accounting for 10.2% of the province’s land area; the sub-suitable area is 51,621km2, accounting for 49%; the suitable area for moso bamboo and bamboo shoots is 18,814.28km2, accounting for the province’s area 18.47% of the area, and the sub-suitable area is 55330.96km2, accounting for 54.32%; the suitable pecan planting area in Lin'an City accounts for 17.2% of the county's area; the suitable and relatively suitable area for planting pomelo in Changshan County is about 400km2; the suitable and suitable area for ginkgo in Changxing County The area of ??the more suitable planting area is about 154km2; the area of ??the suitable and more suitable planting areas of Zhuji torreya is about 306km2; the area of ??the suitable and more suitable areas of Yuhuan pomelo planting is about 188km2. This achievement provides scientific basis and technical support for the planting layout planning of characteristic and advantageous agricultural products.

Figure 1 Suitable tea planting zone map in Zhejiang Province

3.3 Research on prediction and early warning of agricultural geological environment changes

Through "Research on Spatiotemporal Changes of Soil Heavy Metals", "Soil pH" "Research on value changes", "Research on the total amount, effective amount and morphological composition of elements", "Research on the correlation between heavy metals in soil and agricultural products", and obtained the following important understandings.

(1) Human activities, especially the process of urbanization and industrialization in the past 20 years, have caused significant changes in the agricultural geological environment, mainly manifested in soil pollution and acidification. Research shows that in the 12 years from 1990 to 2002, the contents and spatial distribution patterns of toxic and harmful elements in soil in three coastal areas of northern Zhejiang, central Zhejiang and eastern Zhejiang have changed significantly. Arsenic (As), cadmium (Cd), copper Elements such as (Cu) and fluorine (F) show high pollution accumulation rates. Among them, the average relative accumulation rate of seven elements including cadmium (Cd), copper (Cu), and sulfur (S) reaches more than 15%.

(2) The rapid accumulation of toxic and harmful elements has caused the degradation of land quality, which has lit up a red light and issued an alarm for land safety. For example, a comparison of the comprehensive evaluation of soil environmental quality in the plain area of ??northern Zhejiang in 1990 and 2002 showed that the area of ??Class II and Super III soils in this region increased by 1.5% in the past 12 years; the area of ??Class I soil decreased by 1.2%. The safety (or risk) evaluation of cultivated land (soil) supported by a large amount of measured data from this survey shows that within the three main survey areas, safe cultivated land accounts for 93.2%, potential risk (warning) cultivated land accounts for 5.8%, and hazardous cultivated land accounts for 5.8%. 1.0%.

(3) Research results show that heavy metal elements in soil undergo geochemical changes as the soil changes. For example, Cd and Hg, the two most threatening elements, decrease when the pH value decreases (acidification process) , when organic matter gradually decreases, it can increase the risk of its activation, spillage and entry into the biological food chain.

(4) Research shows that although the source, content and safety of heavy metals entering agricultural products are affected by many factors, the increase in the content of heavy metal elements in the soil environment will inevitably affect the quality of agricultural products. and security, there is an essential correlation between the two. In just 12 years, the accumulation trend of heavy metal elements in Zhejiang soil has increased the safety risks of agricultural products as a whole.

3.4 Research on soil pollution and ecological impacts around cities

The survey shows that soil pollution in cities and surrounding areas is the main regional characteristic of soil environmental problems in Zhejiang. Through investigation and research on soil environment problems in five large and medium-sized cities including Hangzhou and surrounding areas, the geographical distribution, main pollutants, and pollution sources of soil pollution were identified, and the degree of pollution and ecological impact were evaluated, providing information for the rational adjustment of suburban land use functions. basis.

For example, in the soil environment research in Hangzhou, the research focused on the safety of Hangzhou vegetable bases and the source of Pb pollution in West Lake Longjing tea. The conclusion was that heavy metal pollution in the soil environment of traditional vegetable bases has been It seriously affects the health and safety of vegetables. Considering urban development, it is recommended to re-plan. The application of Pb isotope tracing technology to track the source of lead (Pb) in West Lake Longjing tea shows that Longjing tea is mainly related to man-made pollution - atmospheric deposition of Pb pollution such as gasoline and coal burning. Therefore, it can be improved by controlling the emission of Pb-containing waste gas. Atmospheric environment and ecological environment quality solve the problem of Pb in tea.

3.5 Research on Land Environmental Quality and Safety Evaluation

As a natural resource, land is closely related to the human living environment, and is valuable and vulnerable to human activities. sex. The environmental quality and safety of land has become a resource and environmental issue that has attracted widespread attention today. It is related to food security and the sustainable development of society. Land safety evaluation is a new topic. Due to the complexity of the soil environment and the diversity of participating indicators, the evaluation work is very difficult. In order to make full use of the agricultural geological environment survey results in Zhejiang Province, explore methods for land security assessment and promote land security assessment work.

Figure 2 Agricultural land safety assessment map in the northern Zhejiang plains

Through research on the occurrence forms of heavy metals in soil, research on the correlation between agricultural products and heavy metal elements in soil, Cd in rice , Hg background value research and other work, a relatively clear evaluation idea has been formed, namely:

(1) In terms of evaluation objectives, the focus of cultivated land is highlighted, because cultivated land is the main place for agricultural production.

(2) In the evaluation indicators, highlight heavy metal elements. Investigations show that the residues of organic pollutants (666, DDT) in Zhejiang soil have degraded to a safe range. The application of chemical fertilizers is a controllable factor, and the treatment and restoration of heavy metal pollution are an international issue. Sexual Difficulties. Cd and Hg, especially Cd, are the main heavy metal pollutants affecting the agricultural geological environment in Zhejiang. Although elements such as Pb have a widespread impact on the safety of agricultural products, studies have shown that the effect characteristics of such elements in the soil-crop system are still unclear. It is not obvious that the pollution of Pb and F in agricultural products mainly comes from the atmospheric environment.

(3) In terms of evaluation standards, a method that combines national standards with agricultural product safety standards is adopted. The results of the evaluation are characterized by safety levels.

The comprehensive evaluation results found that 93.2% of the farmland soil in the three main agricultural areas of the northern Zhejiang plain area, the central Zhejiang hilly basin area and the eastern Zhejiang coastal hilly plain area is in a safe state (Figure 2, Figure 3, Figure 4), 5.8% are in the warning zone, and the danger zone only accounts for 1.0%. Agricultural land in warning zones and dangerous zones is mainly distributed around large and medium-sized cities.

Figure 3 Agricultural land safety assessment map in the central Zhejiang Basin

4 Demonstration and application results

4.1 County (city) level 1:50,000 Agricultural geological environment survey in demonstration areas

The establishment of agricultural geological environment survey demonstration areas within the administrative scope of cities and counties is a prominent feature of agricultural geological environment surveys in Zhejiang Province.

The agricultural geological environment investigation work carried out in seven demonstration areas including Xiaoshan District, Changxing County, Pinghu City, Cixi City, Ruian City, Longyou County, and Shangyu City in Hangzhou City has been characterized by pertinence, systematicness, and data integrity. , has been welcomed and supported by local governments at all levels, and has given full attention to the results obtained from the survey and research. Some of the results have been applied in the adjustment of agricultural industry structure, construction of agricultural information systems, development of specialty agricultural products, and preparation of the "Eleventh Five-Year Plan" among.

Figure 4 Agricultural land safety assessment map in the hilly and plain areas along the coast of eastern Zhejiang

Based on the evaluation results of the agricultural geological environment in the area, the Xiaoshan District Government of Hangzhou City proposed the "Bei Cai Bei" The industrial adjustment plan of "Miao Miao Migration South and Eastward Expansion" has improved the "Xiaoshan District Agricultural Industry Layout Plan"; the Cixi Municipal Government has adjusted the city's "Agricultural Breeding Zoning" based on the comprehensive research results of agricultural geological environment, promoting the development of industrial bases. Construction; Pinghu City has adopted measures such as balanced fertilization, reduction of acidic fertilizers, and control of sewage irrigation to address the soil acidification problem discovered during the investigation. Many cities and counties have made a fuss about the selenium-rich soil resources discovered in this survey. For example, Shangyu City, in the "Several Policy Opinions on Supporting the Development of Agricultural Industrialization", plans to allocate 600,000 yuan in funds to develop selenium-rich agricultural products; Ruian City has focused on the development of selenium-rich soil; the selenium-rich tea developed by Evolution Town in Xiaoshan District has been put on the market; Longyou County has established the "Longyou Zhitang Selenium-Rich Food Development Co., Ltd." According to the survey As a result, 6 selenium-rich food trademarks have been registered. The planting area of ??selenium-rich white lotus and rice has expanded by 20% compared with 2004. In 2005, the income from selenium-rich rice alone increased by 10.82 million yuan.

4.2 Research on the technical system of agricultural geological environment investigation methods

Through extensive practice, the agricultural geological background field investigation methods, multi-media sample field collection methods and analysis used in project implementation Testing methods, comprehensive research methods, evaluation methods, mapping methods and related technologies (such as "3S" technology, isotope tracing technology, information technology, etc.) were systematically summarized, and in practice, a system including evaluation objectives, evaluation methods, The agricultural geological environment evaluation system in four aspects including evaluation indicators and evaluation standards provides a model for similar projects carried out across the country.

4.3 Agricultural development and agricultural division in Zhejiang Province

Based on the actual agricultural development and agricultural economic zoning characteristics of Zhejiang Province, combined with agricultural geological and environmental conditions, the province is divided into: Northeastern Zhejiang City There are three major agricultural functional zones and 13 functional sub-regions, including the suburban and export-oriented agricultural development zone in southeastern Zhejiang and the comprehensive and ecological agricultural development zone in central and southwestern Zhejiang (Figure 5). Suggestions on agricultural development and industrial layout in key areas were put forward, providing scientific basis for accelerating the adjustment of agricultural industrial structure, establishing regional agricultural development positioning, implementing classified guidance, and building regional advantageous agricultural industrial zones (belts).

Figure 5 Agricultural functional zoning map of Zhejiang Province

Figure 6 Comprehensive zoning map of green (pollution-free), selenium-rich grain and oil industry in Zhejiang Province

In the agricultural geological environment Based on the relevant research results obtained from the survey, based on the agricultural geological environment and agricultural natural ecological environment elements, with the crop planting adaptability evaluation and development potential evaluation as the core, and based on the principle of advantage comparison, the "Agricultural Comprehensive Zoning Method" was proposed It fully considers four factors, including the safety of the origin of agricultural products, effective utilization of characteristic agricultural resources, suitability of agricultural product planting and regional economic and social characteristics. It has distinctive characteristics and advanced nature, and is also a major breakthrough in traditional agricultural zoning work. Applying this method, the industrial layout and division of the province's four major crops including grains and oils (Figure 6), tea, vegetables, and fruits are conducive to ensuring the safety of agricultural products (green and pollution-free) and the effective use of resources. The layout of agricultural industry has good guiding significance.

4.4 Construction of Zhejiang Province Agricultural Geology and Environment Information System

The "Zhejiang Province Agricultural Geology and Environment Information System" for the first time truly combines the soil geology, geochemistry and hydrogeology obtained from the survey. , agricultural product safety, non-point source pollution, characteristic agricultural product site environment, remote sensing, agricultural resource environment, coastal environmental geochemistry and other massive data, as well as project document data, DEM and basic geographical information, interpretation and evaluation results, etc., are included in the agricultural geological database. Build massive spatial and non-spatial databases of different time periods, different structures, multiple sources, and multiple scales. It adopts key technologies such as massive terrain and image management technology, fast three-dimensional display technology, spatial data and non-spatial data integrated management technology, and component GIS (COMGIS) technology, and applies advanced pyramid models to manage data, basically realizing the integration with agricultural geology. With functions such as collection, storage, processing, use, dynamic update, statistical analysis, query, and output of environmental-related information, a comprehensive platform for sharing agricultural geological environment professional information and social public information has broad application prospects.

This project adheres to the combination of multiple systems and departments, and adheres to the geoscience-led multi-disciplinary and multi-professional combination, the combination of industry, academia and research, the combination of basic surveys and special research, the combination of survey research and application. In principle, the implementation of the project achieved the purpose of "finding out the family background" and obtained a batch of brand-new survey and research results that filled the gaps, providing important basic information and scientific basis for the preparation of Zhejiang's "11th Five-Year Plan". The agricultural geological environment survey in the demonstration area, which is targeted at cities and counties (districts), has attracted increasing attention from local governments. As a large-scale basic applied research project for public welfare, the role of its results has gradually emerged, and some of the results have begun to be tried out in some areas. , some strategic adjustment decisions have achieved good results. Some county and city-level governments and farmers in our province have begun to realize the potential of agricultural geological environmental surveys and have requested to carry out relevant survey work. The social and economic recognition and demand for agricultural geological work are increasingly emerging. The "Zhejiang Province Basic Farmland Quality Survey and Evaluation" project has been approved by the provincial government, and the overall plan for project implementation is under intense preparation.

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Review of Achievements of Agricultural Geological Environmental Investigation in Zhejiang Province

Wang Qinghua, Dong Yanxiang, Zheng Wen

(Zhejiang Institute of Geological Survey, Xiaoshan 311203)

Abstract: Agricultural geological environmental investigation, considering survey as base, evaluation as kernel and study as tache, studies and evaluates the agricultural geological environment in different aspects, degrees and scales, consequently obtaining some important ac

hievements. It enriches our agricultural basic data and increases agricultural geological technological reserve. They will supply the agricultural programming, structural adjustment and highly effective ecological agriculture with technological support and basic service for building ecological province and sustainable development stratagem.

Key words： Zhejiang Province; Agricultural geological environmental investigation; Achievements