Recently, during an interview with a reporter in Huxian County in Shaanxi, Xing Yaodong, a senior agronomist, said that many farmers' friends do not know much about the characteristics of fertilizers. He said that there is an "association" relationship between fertilizers, and there is also a contradiction between "g". For example, if more phosphate fertilizers are used, the excess available phosphorus will combine with the available zinc in the soil to form insoluble zinc phosphate precipitates, which will cause the lack of effective zinc in the soil.
Therefore, to prevent fertilizers from "fighting" with each other, the following actions can be taken:
As far as possible to achieve balanced fertilization on the crop or partial application of fertilizer, not only wasted fertilizer, increased production costs, but also easily lead to the lack of certain nutrients. When fertilizing, according to the different fertilizers required by the structure of the crop and the size of the soil's fertilizing capacity, it is necessary to measure the amount of fertilizer, not biased, and strive to balance the nutrient elements.
According to the proportion of demand for various nutrients in different crops, the proportion of nutrients in compound fertilizers or compound fertilizers should be appropriately increased and harmonized. Therefore, fertilizers should be dominated by compound fertilizers, supplemented by simple fertilizers. For example, crops with high potassium content, such as tubers and tubers, can be added appropriately on the basis of sulfur-based compound fertilizers. Potassium sulfate is a simple fertilizer.
If the zinc fertilizer and the phosphate fertilizer are mixed during the staggered application period or application site, "phase gram" will occur. Therefore, phosphate fertilizer should be used as base fertilizer or basal fertilizer, and zinc fertilizer should be used as top dressing. Nitrogen, phosphorus, potassium and other macronutrient fertilizers should be dominated by rhizosphere topdressing, and microfertilizers should be foliar sprayed.
To narrow the contact range, nitrogen and potassium fertilizers can be used as a means of spreading; the phosphate fertilizer can be used as a method of concentrated fertilization; the micro-fertilizer can be seed dressing, soaking, and rooting, so that the trace elements are confined to the smaller range of the root. Not in contact with a large number of elements.
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