We all know that the most prominent advantage of organic fertilizer is to improve soil organic matter, and at the same time, it can activate soil, enhance water conservation and improve fertilizer supply capacity. However, excessive application of organic fertilizer will cause soil salt accumulation, affect soil physical and chemical properties and affect the normal growth of crops.
Moreover, excessive application of organic fertilizer will also cause nitrate to accumulate in vegetables. More seriously, excessive application of organic fertilizers such as municipal refuse contaminated by heavy metals will also cause heavy metal pollution in soil and vegetables.
First, choose high-quality organic fertilizer:
Not all organic fertilizers are high-quality organic fertilizers, especially those used in recent years. Most of them are processed commercial organic fertilizers with low quality. Unlike pure farmyard manure at home when I was a child, sheep manure and feces were decomposed and directly applied to the ground. Organic fertilizer is high in content and rich in nutrition, which has a certain remediation effect on improving soil.
Really high-quality organic fertilizer is the basis of high yield of crops. However, most of the organic fertilizers we plant and apply now are commercial fertilizers, which are generally of low quality and not as pure as farmyard manure when I was a child. At present, the quality of commercial fertilizers is low, and some of them are even mixed with municipal sludge and domestic garbage, which can not meet the standard of organic matter content at all. Even the so-called farm organic fertilizer we buy now has been mixed with caustic soda by some vendors, and the effect of inferior organic fertilizer applied to the soil can be imagined. So when choosing organic fertilizer, we must look at the content of organic matter, or choose some reputable formal factories.
Second, strictly control the application amount of organic fertilizer:
Because excessive application of organic fertilizer is harmful, we should control its dosage in future production. Pure chicken manure 15 ~ 20 cubic meters, rice husk fertilizer 35 ~ 40 cubic meters are suitable for each mu of vegetable field, and tomato and fruit fertilizer vegetables need more fertilizer, so the upper limit can be taken. The fertilizer demand of leafy vegetables is slightly small, so the lower limit can be taken.
Third, with the application of biological fertilizer:
Organic fertilizer, whether base fertilizer or flushing application, is best used in combination with biological fertilizer. Why should it be combined with biological fertilizer? Because the biological bacteria in the biological fertilizer can accelerate the decomposition of organic matter in the organic fertilizer after the combination of organic fertilizer and biological fertilizer, which is more conducive to crop absorption, and at the same time, it can decompose and transform some harmful substances in the organic fertilizer to avoid damage to vegetables. Therefore, when applying organic fertilizer in the base, it is suggested to use green bag fertilizer, traditional Chinese medicine and biological bacterial fertilizer to protect leaves, soil and roots, and the effect will be doubled.