Prevent soil deterioration caused by excessive use of organic fertilizer in vegetables

Everyone thinks that excessive use of chemical fertilizer will have an impact on the soil, but it is not known that excessive use of organic fertilizer will also cause soil deterioration. As it has always been believed that organic fertilizer has no great effect on the soil, the application of more organic fertilizer will help to increase soil fertility. In recent years, many vegetable farmers have increased the use of organic fertilizer. However, excessive application of organic fertilizer will also affect the physical and chemical properties of soil, serious will cause soil salt accumulation, affecting crop growth. And excessive input of organic fertilizer will also cause nitrate accumulation in vegetables. More seriously, excessive application of organic fertilizers such as municipal solid waste polluted by heavy metals will also cause heavy metal pollution in soil and vegetables. The rational use of organic fertilizer in vegetable fields should start from the following aspects.

First, choose high-quality organic fertilizer

High-quality organic fertilizer is the basis of high quality and high yield of vegetables, but now most of the organic fertilizers used by vegetable farmers are bought commercial fertilizers, which are generally of low quality, and some are even mixed with municipal sludge and domestic waste, which can not reach the standard of organic matter content at all. Even some bought chicken manure is mixed with soil, or has been mixed with fire alkali by some illegal traders (to increase the volume). After these inferior organic fertilizers are applied to the soil, the effect can be imagined. Therefore, high-quality organic fertilizer must be selected in production, and it is best to choose the one produced by regular large manufacturers when selecting commercial organic fertilizer.

Second, strictly control the amount of fertilizer application

Since more application of organic fertilizer is harmful than beneficial, we should control its dosage in the future production, so how much per mu of vegetable field can we apply to meet the needs of vegetable production? The author thinks that, in general, it is suitable to apply 1520 square meters of pure chicken manure and 3540 square meters of rice husk manure per mu of vegetable land, and the fertilizer amount of eggplant fruit manure vegetables can be taken as the upper limit. The amount of fertilizer required for leafy vegetables is slightly smaller, and its lower limit can be taken.

Third, the application effect of biological fertilizer is good.

No matter basic application or flushing application, organic fertilizer had better be used with biological fertilizer. Why cooperate with biological fertilizer? Because after the application of organic fertilizer in combination with 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 causing harm to vegetables. Therefore, in the basic application of organic fertilizer, the combined application of biological fertilizer can be 150 kg / mu and 200 kg / mu, and the combined application of biological fertilizer 20 kg / mu and 25 kg / mu can achieve better results.