Agricultural production is a complex ecosystem that is affected by various factors. Under certain climate and cultivation conditions, the basic yield (the yield without fertilizer area) is an important index reflecting the soil fertility, and the relationship between soil agrochemical traits and the yield of non-fertilizer area is primary and secondary, and some of them are more important factors. There is a dominant and restrictive effect on the yield in the non-fertilized areas, and there is a functional relationship between crop yields, which is reflected in the quantitative relationship between these factors and yield.
The soil nutrient detection instrument found that, in a certain range, the soil organic matter is similar, the total amount of nitrogen is low in silting silting soil, and generally the soil with high nitrogen activity ratio is usually high in the terrain, and the water injection and drainage are convenient. Good permeability, mostly high-yield perennial early or three-round rotation field (rice early morning rotation); on the contrary, soils with higher total nitrogen and lower activity generally have low topography and poor drainage conditions. For the annual paddy field to change early or second round of field (rice-dry rotation), the output is not high.
The higher the soil fertility, the higher the basic yield, and the smaller the dependence on a fertilizer. The lower the soil fertility, the opposite is true. About 61% of the nutrients needed for wheat production in high-yielding fields come from the soil, and only 39% come from fertilizers; while only 3s% of the nutrients needed for wheat production in low-yield fields come from the soil, and 62% depend on the fertilizer supply. From this we can see that maintaining and improving the nutrient supply capacity of soil is very important for stable production and high yield of wheat.
The soil nutrient fastness tester measures the nutrient of different fertility soils, and determines the specific fertilization amount according to the soil fertility level, which not only saves chemical fertilizers, but also improves economic benefits. The best fertilization amount of wheat is in high fertility soil N, Pz0. They are 13 to 14 kilograms and the output is about 450 kilograms; the medium fertility soil is 10 to 16 kilograms, the yield is about 400 kilograms, and the low fertility soils are 16 to 18 kilograms respectively, and the yield is similar to or slightly lower than that of the intermediate fertility soil.
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