When planting crops, organic fertilizer over fertilization will bring what harm?

Organic fertilizer is now more and more application of a fertilizer. What are the common misunderstandings in the application of organic fertilizer? Here is a brief introduction to the misunderstanding of organic fertilizer application.

First, direct application of raw manure fertilizer

Second, excessive application of organic fertilizer

Organic fertilizer is low in nutrient content, and has no significant effect on crop growth. Unlike chemical fertilizers, it is easy to burn seedlings, the organic matter accumulated in the soil can significantly improve the soil. Some people mistakenly think that the more organic fertilizer used, the better. Excessive application of organic fertilizer, like chemical fertilizer, can cause harm. Harm is mainly manifested in the following points.

Over-application of organic fertilizer leads to burn seedlings. The application of a large amount of organic fertilizer leads to the accumulation of phosphorus, potassium and other nutrients in the soil, resulting in an imbalance of soil nutrients. The application of a large amount of organic fertilizer, the accumulation of a large number of nitrate ions in the soil, resulting in excessive nitrates in the crops.

Third, insufficient organic and inorganic cooperation

Organic fertilizers are nutritionally comprehensive but low in content. In order to fully meet the nutritional needs of crops during the vigorous growth period, should be based on the use of organic fertilizers, the appropriate amount of chemical fertilizers added. Some manufacturers exaggerate the role of organic fertilizers one-sidedly, only organic fertilizers, can not meet the nutrient needs of crops at the critical moment of growth, resulting in crop yield reduction.

Fourth, I like to apply a large amount of low-priced organic fertilizer

There are many types of organic fertilizers, different raw materials and methods of organic fertilizer processed out of the quality of the difference is great: such as farmers in the field of organic fertilizer naturally piled up, although after a long time of pile rot, the bacteria inside has been killed, but due to the long fermentation process 7 and rainwater solubilization effect, inside the A large portion of the nutrients have been lost.

In addition, some impurities such as soil are inevitably brought in during the processing, and there is no drying process, so the moisture content in the fertilizer is relatively high. So although this organic fertilizer is large and heavy, it does provide very little organic matter and nutrients to the soil. In the case of chicken manure, for example, fresh manure has a high water content, usually 70%, and the dry matter only accounts for a small portion, most of which is water. Therefore, 1 ton of dry organic fertilizer with a water content of less than 20% can be processed from about 3.5m3 of fresh manure.