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Organic fertilizer combined with chemical fertilizer has a multiplying effect, so some commercial organic fertilizers add some nitrogen fertilizers, such as urea, ammonium sulfate or ammonium chloride, and the total nitrogen content is 6%~10%, or even higher, but some enterprises have not It is clearly marked in the bag. If these commercial organic fertilizers are still applied in accordance with the application rate of about 1% of the nitrogen fertilizer in general, it will inevitably cause the crop to burn and burn. Therefore, some experts suggest that the application of commercial organic fertilizer must know the nitrogen content, and should apply the fertilizer with higher nitrogen content based on a small number of multiple fertilization principles.
Applying organic fertilizers to know the nitrogen content
The application of organic fertilizer can increase the organic matter content of cultivated land, and the benefits are many. The author here is to remind farmers that the nutrient content, especially the nitrogen content, should be identified when applying commercial organic fertilizer. In general, in addition to individual cake fertilizers and human excrement, the total nutrient content of nitrogen, phosphorus and potassium is generally not more than 6%, and the total nitrogen content is generally not more than 3%. Under normal circumstances, the total nitrogen content of most composts is less than 1%, the total nitrogen content of pigs, sheep and sheep is not more than 1.5%, and the nitrogen in these farmyard manures is mostly organic, which can be released by decomposition and transformation in the soil. Absorbed by crops. According to the 1% nitrogen content of common organic fertilizer, 6-8 tons of farmyard manure per acre, and appropriate reduction of fertilizer application, will not be a problem.
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