Comprehensive development and utilization of crop straw Abstract: Crop straw is the main by-product of agricultural production, and it is also an important resource of industrial and agricultural production. This paper introduces the general situation of comprehensive utilization of crop straw, discusses the technical methods of comprehensive utilization of crop straw at present, and puts forward the basic ways of comprehensive development and utilization of crop straw in the future. Keywords: crop straw; All-round development; Use; In recent years, in order to realize the comprehensive utilization of crop straw, straw processing and utilization technologies such as combined harvest, straw returning to field, silage ammonification, straw processing pellet feed, and straw breeding earthworm have been vigorously promoted all over the country, and good results have been achieved. In particular, the comprehensive utilization level of straw has been improved by returning straw to the field, prohibiting incineration and carrying out comprehensive utilization. However, at present, there are not many technologies for comprehensive development and utilization, and most crop straws (about 500 million tons in China) have not been rationally utilized. Only relying on single technology and small-scale production and processing methods can not make full use of all straw, and the economic and social benefits are very low. There is still a lot of room for comprehensive utilization of straw. 2.3 scientifically adjust the agricultural structure and improve the quality of crop straw. At present, various measures and technologies are adopted to solve the problem of straw utilization at the existing level. However, to fundamentally solve the problem of straw, we must strive to reduce the production of straw, reduce the output of straw, and control it from the source. First, speed up the adjustment of planting structure, establish a complete and applicable ternary planting structure of grain, economy and feed, and reduce the planting area of crops with low nutritional value and relatively high straw yield on the premise of maintaining stable grain and oil output. The second is to start with crop breeding and select new varieties with high seed yield, good quality and high straw feeding value. According to the fact that autumn crops, especially corn, are mostly used as feed in China, the planting and popularization of feed-specific corn can be accelerated according to local conditions. In areas where herbivores, such as cattle and sheep, are concentrated, whole-plant silage of corn with ears can be adopted, so that no waste straw can be produced in corn planting areas. Third, we should accelerate the development of herbivores (cattle, sheep, horses, etc.). ) Straw can be used to cultivate excellent livestock and poultry varieties with high fecundity, rough feeding tolerance and fast growth, and expand the breeding scale. By returning straw to the field, the virtuous cycle of "land-crop straw-livestock" and the improvement of the output system will be accelerated, and the economic and social benefits will be improved. Reference 1 sheet. Comprehensive utilization of crop straw to protect ecological environment [J]. Agricultural mechanization in Shandong, 2005 Geng Liping. The development of straw feed is promising [J]. Guangdong Feed, 2005 (2): 17 ~ 193 Kong Fanzhen. Straw feed processing technology [J]. Contemporary 2004 (9): 37 ~ 394 weeks. Illustration of straw feed processing application technology [M]. Zhengzhou: Henan Science and Technology Press, 20035, Zhou Enfang. Complete Collection of Feed and Utilization [M]. Beijing: China Agricultural Publishing House, 20036 Dong, Yue. Efficient production technology of non-grain feed [M].