Soil fertility and fertilizer supply

Soil fertility refers to the absorption of soil nutrients (including physical, chemical and biological absorption) and conservation capacity. Soil fertility refers to the ability of the soil to release and supply crop nutrients. Therefore, the soil has fertilizer and fertility, because the soil can form a composite colloid. This colloid has a huge surface energy and charge, and plays a dominant role in the absorption and release of nutrients. Soil colloid is a complex composed of organic and inorganic colloids. The ability to absorb and release nutrients is not the same due to the composition of various soil colloids, which means that there are different fertilizer retention and fertilizer supply performances. This is closely related to fertilization. . A good soil should be in harmony with fertilization and fertilizer supply, absorb and release more freely, and be able to meet the soil needed for crop nutrients at any time. The soil with more viscous soil texture and more organic matter content has good fertilizer retention performance. The applied fertilizer is not easy to lose, and it is easily stored in the “warehouse” and ready for crop absorption. The sandy soil, soil with low organic matter content, it is not easy to preserve nutrients after fertilization, although the supply of fertilizer is good, but no stamina, nutrients easily lost, hair seedlings do not grow old seedlings. There are differences in the fertilization and fertilization on different soils. Soils with poor soil fertility and low organic matter content can be treated with organic fertilizers in the base fertilizer to increase fertility and fertilizer supply capacity. The application of chemical fertilizers should be “eat less meals” to prevent loss and pay attention to the phenomenon of late defertilization. appear. For clay soil with good fertilizer retention performance, or for soil with large organic matter, a large amount of fertilizer is not disturbed and will not be lost. This kind of soil is easy to grow old seedlings without sprouts. In the early stage, the seedling crops grew well through the application of seed fertilizers and topdressing fertilizers. During the middle and later periods, the soil nutrients were stably released and supplied, which was beneficial to the whole growth period.

The application of organic fertilizers to increase the accumulation of organic matter in the soil is conducive to the enhancement of fertility retention capacity; appropriate irrigation and suitable tillage are conducive to the improvement of soil fertility.

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Final Bulk

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