Compound fertilizer has the advantages of high nutrient content, few by-products and good physical properties, which plays a very important role in balancing fertilization, improving fertilizer utilization rate and promoting high and stable yield of crops. In the production of compound fertilizer, soil testing formula is often used to determine soil nutrients. Formula fertilization by soil testing is based on formula fertilization by soil testing and fertilizer field experiment, according to the law of crop fertilizer demand, soil fertilizer supply performance and fertilizer effect.
However, it also has some shortcomings, such as its nutrient ratio is always fixed, while the types, quantities and proportions of nutrient elements needed by different soils and crops are diverse. Therefore, it is best to test the soil before use to understand the texture and nutritional status of the soil in the field, and at the same time, pay attention to the application with unit fertilizer, and the effect is better.
Introduction of fertilizer
Fertilizer refers to a substance that can supply nutrients needed for crop growth and development, improve soil properties and improve crop yield and quality. It is an important means of production in agricultural production, generally divided into organic fertilizer, inorganic fertilizer and biological fertilizer. According to the source, it can be divided into agricultural fertilizer and chemical fertilizer, and according to the amount of nutrients contained, it can be divided into complete fertilizer and incomplete fertilizer. According to the characteristics of fertilizer supply, it is divided into direct fertilization and indirect fertilization. It is divided into nitrogen fertilizer, potassium fertilizer, trace element fertilizer and rare earth element fertilizer according to the components.
The development of planting industry in agricultural production is inseparable from fertilizer. Agriculture in China has a long history of100000 years. Ancient fertilizer was called manure, and fertilization became a manure field. Farmland fertilization in China began in the Yin and Shang Dynasties, mainly based on the cultural relics unearthed at that time, wooden tools with mud in the river, and the records in Oracle Bone Inscriptions during the Yin and Shang Dynasties, indicating the characteristics of excrement and sculling. It is predicted that fertilization can increase yield.