Efficient and rational application of organic fertilizer

The application of organic fertilizer plays an important role in improving crop yield and quality. However, with the progress of science and technology and the continuous improvement of soil fertility, it has been found that excessive application of organic fertilizer has produced many adverse consequences, not only resulting in the increase of soil salt accumulation. and it has adverse effects on soil bulk density, organic matter, aggregates and microorganisms, which is not conducive to the normal growth of crops. In order to apply organic fertilizer efficiently and reasonably, experts remind us to pay attention to the following three points: first, we should choose high-quality organic fertilizer. At present, more and more commercial organic fertilizers are applied, but the quality of commercial organic fertilizers is generally low, and some of them are even mixed with municipal sludge and domestic waste, which can not reach the standard of organic matter content at all. Even some of the bought chicken droppings are mixed with soil. Therefore, the production must accumulate and select high-quality, pollution-free organic fertilizer, and fully mature. If you need to buy commercial organic fertilizer, you should choose the one produced by regular large manufacturers. Second, the amount of fertilizer application should be strictly controlled. In general, the control amount of vegetable land per mu per season is 1500000 kg of pure chicken manure or 50kg of high-quality cake fertilizer, and 3500kg of fully mature high-quality human and animal manure or soil fertilizer. The fertilizer requirement of fruit and tuber vegetable crops is larger, and the upper limit can be taken, while the fertilizer requirement of green leafy vegetables is relatively small, and the lower limit can be taken. The third is to cooperate with the application of biological fertilizer. The biological bacteria in biological fertilizer can accelerate the decomposition of organic matter in organic fertilizer, make it more beneficial to crop absorption, and at the same time decompose and transform some harmful substances in organic fertilizer to avoid damage to crops. Generally, in the basic application of organic fertilizer, 150-200 kg of biological fertilizer can be applied per mu, and 20-25 kg of biological fertilizer can be applied every time when topdressing.