Formulation based on fertilization

1. Equally important laws There are 16 chemical elements known to be necessary for plant growth. Among them, carbon, hydrogen and oxygen are present in the atmosphere and water. The 13 elements from the soil can be divided into two categories: nitrogen, phosphorus, potassium, calcium, magnesium and sulfur are more abundant in the crops and more absorbed. It accounts for a few to a few thousandths of dry matter, and is called a large number of elements. Among them, nitrogen, phosphorus and potassium are the most important. They are called “three elements”; iron, manganese, zinc, molybdenum, boron, copper and chlorine. The demand for crops is very small, accounting for a few tenths of a million to a few hundred thousand parts of dry matter, called trace elements. Whether it is a large number of elements or trace elements, it is equally important for crops and is indispensable. The lack of a certain trace element, although its demand is only a few parts per million, will lead to micronutrient deficiency and lead to reduced production. For example, the lack of boron in rape can cause flowers to be unreal. Therefore, its importance is the same as a large number of elements, and it is not negligible because of the small amount of demand, so it is called the "equal importance law."
2, irreplaceable to the various nutrients required by the law crops, they have certain functions in the crop body, and can not replace each other. In the absence of any nutrients, it is necessary to apply fertilizers containing this nutrient. This is called “irreplaceable law”.
3, the minimum nutrient law to ensure the normal development of the crop to obtain high yield, must meet all the nutrients it needs. One of them does not reach the required amount, growth is affected, and yield is limited by this minimal nutrient.
4, nutrient return theory test results show that 55-80% of the crop yield of nutrients are absorbed in the soil, we can not regard the soil as an inexhaustible "nutrient pool", it must rely on fertilization In the form of “returning” the nutrients absorbed by the crops to the soil in order to maintain the original productivity of the soil.
5. Fertilizer effect diminishing law Under the condition that other conditions are relatively stable, with the gradual increase of fertilization amount, the crop yield will also increase, but the crop yield increase will show a decreasing trend. That is to say, with the increase of fertilization amount, the economic benefit of fertilization is gradually reduced, and if this fertilizer is excessively invested, it will lead to a reduction in production.
6. The comprehensive effect of production factors The yield of crops is not only related to fertilization, but also related to other environmental factors such as water, temperature, CO2 concentration and illumination that affect crop growth. In order for fertilizer to fully exert its potential for increasing production, other environmental factors must be considered. It can be said that scientific fertilization requires a systematic engineering perspective.
The characteristic formula of formula fertilization is characterized by “pre-natal fattening”. In other words, before farmers plant a certain crop, know what fertilizer should be applied in their own land? How much is the best dosage? It is impossible to achieve the required output because of less application, and it is not possible to cause unnecessary waste or even reduce production due to multiple application. Therefore, the central problem to be solved by formula fertilization is to decide the problem of using fertilizer before birth.

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