The frequent use of chemical fertilizers has led to the weakening of soil fertility, which has caused great changes in the soil structure of farmland in Taining County. Soil is the base on which crops grow. High-fertility soils must have good agglomerate structure and regulate suitable water for crops. , fertilizer, gas, heat, for the crop to transform, preserve and continue to provide the required nutrients. This mainly depends on the role of hundreds of millions of micro-organisms per gram of soil living in the soil, while microbial life is mainly maintained by organic matter. In natural ecosystems, plants are producers, animals are consumers, and microorganisms are decomposers. The limited nutrients on the surface of the earth depend on the decomposer of microorganisms for recycling.
This decomposition is mainly carried out in soil and water. Therefore, the most reasonable measure is to put animal and plant waste into the soil as much as possible to promote the proliferation of microorganisms. Microorganisms decompose organic matter and release nutrients for plant growth and utilization, forming high fertility. At the same time, they also synthesize their own cells, which preserve nutrients in the cells without being lost. After the microbes die, nutrients can be mineralized for use by plants. On the other hand, microorganisms continue to convert organic matter into humus. Together with the macromolecular substances secreted by microorganisms, humus condenses soil mineral particles into agglomerate structure, creating a growth environment suitable for plant water retention, fertilizer retention, temperature regulation, and aeration. Therefore, the content of soil humus is often used as an indicator to measure soil fertility.
The most important thing is that the use of organic fertilizer can reduce fertilizer dependence and is an effective way to cultivate high-fertility soil. If the waste produced by the seed and the nourishment industry can be turned into an organic fertilizer, it can not only raise the land but also reduce the pollution. It is an important measure to achieve green agriculture, which is also in line with the laws of the small cycle of elemental organisms in nature. At present, some problems existing in the no-tillage of straw need to be further studied and solved in the process of agricultural modernization. Soil is a precious resource that cannot be regenerated. It must not only pay attention to the quantity but also the quality, that is, maintain its fertility level.
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