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土壤是人类生产的重要资源,是生态系统的重要环节,它支持着天然植物和栽培植物的生产,也繁衍了动物和人类。做为我们这个农业大国,土地更有其独特的重要性。可是我们的耕地面积不大,这就要求我们提高现有土壤的生产力。随着科学的发展,施用化肥使土地的单位面积产量有了很大提高,可是化肥又有它的局限性,施用不当,反而会使土壤逐年变坏,产量也会随之而降低,这样就有必要要求我们培肥土壤,使土壤肥沃度达到一定水平,满足作物对养分的需要,满足
Soil is an important resource for human production and an important part of the ecosystem. It supports the production of natural plants and cultivated plants and also breeds animals and humans. As our agricultural power, land has its own unique importance. However, our cultivated area is small, which requires us to increase the productivity of the existing soil. With the development of science, the application of chemical fertilizers has greatly improved the yield per unit area of land. However, chemical fertilizers have their own limitations. Improper application of such fertilizers can deteriorate the soil year by year and reduce the yield. Thus, It is necessary to ask us to fertilize the soil so that the fertility of the soil will reach a certain level and meet the needs of crops for nutrients to meet