We all know that compound fertilizers are used in the cultivation of crops, and there are many types of compound fertilizers on the market, which can be freely chosen. However, sometimes we do not know the quality of the compound fertilizer, or there are some misunderstandings about the compound fertilizer, which leads to the application of the compound fertilizer bought on the crops, but the effect is not obvious. Today, Hui Nong.com Xiaobian came to tell you about the misunderstandings in the choice of compound fertilizer.
1. Judging compound fertilizer only by the size of the particle surface
Many people think that as long as the granular fertilizer is compound fertilizer, this method of judgment is actually wrong. Because in addition to compound fertilizer, there are large-grain urea, large-particle ammonium bicarbonate, nitrogen-containing formula fertilizer, large-particle ammonium sulfate and other single-element fertilizers. When purchasing, you must look at the active ingredients marked on the packaging bag to determine.
2, the faster the dissolution rate, is a good compound fertilizer
In general, nitrogen fertilizer is the most soluble, phosphorus and potassium fertilizer dissolves slowly, and the compound fertilizer with good granulation hardness dissolves slowly, and the granulation hardness is poor or the powdery compound fertilizer dissolves faster. Generally, the dissolution is fast, and it is easy to lose. Therefore, the type of fertilizer to be purchased should be determined according to the needs of fertilization.
3, the effect of high concentration compound fertilizer is much better than low concentration compound fertilizer
Although the content of nitrogen, phosphorus and potassium in the high-concentration compound fertilizer is high, the proportion of the corresponding medium elements such as calcium, magnesium and sulfur will be reduced, which is not suitable for long-term use. The most important thing is to purchase according to the demand of the crop for nutrition. A compound fertilizer suitable for it.
4. Judging whether the particles of the compound fertilizer are white or not
Many farmers' friends say that the granular white compound fertilizer is a good compound fertilizer. In fact, the color of the compound fertilizer (complex fertilizer) is not necessarily related to the quality of the compound fertilizer. What really needs to be watched is the compound fertilizer that is too white, maybe just a single element fertilizer.
In addition to the above misunderstandings, there are farmers who think that the compound fertilizer imported from abroad is very expensive, but it is much better than the compound fertilizer produced in their own country. Although there is no shortage of good compound fertilizer in imported compound fertilizer, from the perspective of the overall price and effect, there are many domestic compound fertilizers. In short, everyone must recognize the misunderstanding in the choice of compound fertilizer, in order to be able to select the most suitable compound fertilizer for crop growth.
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