Fertilization must be targeted
In the course of crop growth, if one or more essential nutrients are insufficient, the most important deficiency is the nutrient minimum nutrient. This minimum nutrient will affect crop growth and limit yield. When the minimum nutrient is increased to meet crop needs, the element that was originally the smallest nutrient is replaced by another element that has the least amount, and the new minimum nutrient, the smallest nutrient appear. It is not static.
Fertilization practices have shown that soil nutrient balance is relative and temporary, while nutrient imbalance is regular. We must continue to discover new problems in fertilization and solve them through scientific fertilization to increase production.
To supplement the minimum nutrients to emphasize the targeted, the minimum nutrients can be nitrogen, phosphorus, potassium, trace elements, therefore, fertilizer should be targeted. Supplementing nutrients other than the minimum nutrients will have no effect on production increase, but will reduce its utilization rate and cause waste of resources. For example, in the absence of phosphorus in the soil, it is impossible to increase nitrogen fertilizer by increasing nitrogen fertilizer, but it can only reduce the nitrogen fertilizer utilization rate and increase production costs. For example, some corns have “white seedling disease†and the disease disappears after applying zinc fertilizers, indicating that the minimum nutrient is zinc. In some soils, due to low boron content and wheat infestation, the yield of wheat was significantly increased by applying boron fertilizer, which also indicated that the minimum nutrient content was boron.
Illustrated with a storage bucket, the bucket is composed of wooden planks representing different nutrient contents. The amount of water storage, that is, the level of the water level indicates the level of crop yield, that is, the level of crop yield depends on the height of the shortest plank representing the smallest nutrient. First, make up for the short, the water is more loaded, and continue to make the barrel bigger and bigger, so that the output can be higher and higher. Therefore, first of all, grasp the most "short" constraints, the so-called barrel theory.
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