Application of organic fertilizer and inorganic fertilizer
It is best to use refined organic fertilizer for organic fertilizer. The average crop is applied for about 200 kg per mu per season, and the application time is 7 to 15 days before crop planting or transplanting. There are two main methods for applying organic fertilizer and inorganic fertilizer: the first one is organic fertilizer as base fertilizer, chemical fertilizer is used as top dressing or seed fertilizer application; the second is direct mixed application of organic fertilizer and chemical fertilizer, it is necessary to pay attention to both Can not be mixed arbitrarily, some mixing to improve fertilizer efficiency, and some to reduce fertilizer efficiency, such as nitrate nitrogen fertilizer and unfertilized organic fertilizer mixed together, under anaerobic conditions, due to denitrification, easy to cause nitrate nitrogen to run away And loss of nutrients.
Rational fertilization and full play of the fertilizer production increase effect is an important measure to achieve high yield, stable production and low cost. First, reasonable cooperation, mutual promotion of organic fertilizers and fertilizers, nitrogen and phosphorus, is an important principle of rational fertilization.
The organic fertilizer has comprehensive nutrient and slow fertilizer efficiency; the fertilizer has a large concentration of fertilizer and has quick effect. In particular, organic fertilizer contains a large amount of organic matter, which forms a humus through microbial action, which can improve the soil structure, make it loose and soft, and has good ventilation. It is not only beneficial to the growth and development of crop roots, but also helps to improve soil water retention and protection. Fertility. Fertilizer can supply the available nutrients needed for microbial activities, accelerate microbial reproduction and activities, promote the decomposition of organic fertilizers, and release a large amount of carbon dioxide and organic acids, which is beneficial to the dissolution of poorly soluble nutrients in the soil. Therefore, organic fertilizers and chemical fertilizers are combined and applied to make up for each other, and to make full use of these two fertilizers.
Organic fertilizers generally have less nitrogen and less phosphorus, and generally have a good reaction with nitrogen fertilizer. When combined with phosphate fertilizer, it is necessary to affect the effect of phosphate fertilizer. Therefore, in addition to the soil is particularly deficient in phosphorus, the amount of organic fertilizer is small, and a small amount of phosphate fertilizer can be applied. Under normal circumstances, organic fertilizer and phosphate fertilizer are preferably applied to different fields in order to fully exert the effect of fertilizer.