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农作物残体还田是保持土壤有机质平衡、改善土壤有机质状况、培肥土壤的重要手段.为了确定不同地区条件下每年能还田的农作物残体数量及适宜的还田措施,必须掌握农作物残体在土壤中的分解速率和残留数量.然而,直到目前为止,黄淮海平原农田缺少这方面的资料.我们试图用砂滤管法进行试验,逐步摸清黄淮海平原不同气候、不同土壤类型和不同耕作制度条件下的不同种类物料在土壤中的分解速率及腐殖化系数,为今后制定黄淮海乎原农田土壤培肥措施,保持和提高土壤有机质平衡,提供科学依据.
It is an important means to maintain the balance of soil organic matter, improve the status of soil organic matter and fertilize the soil.In order to determine the amount of crop residues that can be returned to the soil in different areas and suitable measures for returning to the soil, it is necessary to know the residues of crop residues However, till now, the farmland in the Huang-Huai-Hai Plain lacks the information in this area.We tried to test with the sand filter tube method to find out the different climate, soil type and different The decomposition rate and humification coefficient of different kinds of materials under the tillage system in the soil will provide a scientific basis for the future development of soil fertility control measures in the Huanghuaihaihe farmland so as to maintain and improve the soil organic matter balance.