The amount of organic fertilizer is insufficient. With the improvement of rural conditions, peasants' enthusiasm for building farmyard fertilizers has decreased, and the aquaculture industry has gradually shifted from being farmer households to large-scale farming. The number of livestock and poultry manure has been reduced, and the utilization rate of large-scale livestock and poultry manure resources is not high. As a result, the amount of organic fertilizer is insufficient. Fertilizer application structure is irrational. The phenomenon of blind fertilization is quite serious among many farmers, resulting in increased ineffective delivery, weak stems, resistance to lodging, resistance to cold, and decreased resistance to diseases. They are often exposed to winter freeze damage and spring downswing cold. In the middle and later stages, diseases and pests are aggravated, and they are prone to lodging, which affects the yield. Straw returned to the field without adding nitrogen fertilizer. Straw returning to land is an effective measure to solve the problem of organic fertilizer shortage, but many farmers do not master the technology, and no nitrogen fertilizer is added after the straw is returned to the field. Fertilization method is not reasonable. Some low-yield fields or soil-poor areas in the winter wheat producing areas have a "one-shot" method of fertilization, that is, all the fertilizers are applied to the soil at one time during the sowing period, and the fertilization period is no longer applied. Improper dressing. Most spring winter wheat cultivation is carried out in the returning green period. Early spring is the key period for wheat spring tillering and basal internode elongation. Overhead fertilizer often leads to too many ineffective tillers. The wheat field is too large and the stalks are weak. Internodes are too long; it will also cause field closure of wheat in the middle and late growth period, poor ventilation and light transmission, powdery mildew and other diseases will increase, leading to easy lodging in the late period and affecting the yield and quality of wheat. New fertilizers are applied blindly. Some science and technology are not high enough and over-hype, resulting in unclear peasants, blind application in the direction of fertilizer is unknown, unclear application methods, resulting in reduced production and economic losses.
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