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土壤有机质含量是土壤肥力高低和质地优劣的重要标志。不断提高土壤有机质含量,则是培肥土壤、增加作物产量的重要措施。据在新集、正定。晋县、栾城四个县32块麦田的调查统计,土壤有机质每增加0.1％,小麦单产可增加26公斤。提高土壤有机质含量,主要靠投入有机肥料,其中以秸秆直接还田具有省工、易行、效果好等优点。现以秸秆还田为例.介绍土壤有机质定量调控与计算的方法。一、土壤有机质年积累量的计算有机质进入土壤后,经过一年的腐解,保留在土壤中的鹰殖质数量与原进入土壤的有机质数量的比值,叫腐殖化系数。有机物质的腐殖化系数一般在0.2—0.5之间。如玉米秸秆的腐殖化系数为0.2,
Soil organic matter content is an important indicator of soil fertility and texture. Continuous improvement of soil organic matter content is an important measure to fertilize soil and increase crop yield. According to the new episode, positive. Jin County, Luancheng four counties 32 wheat fields survey statistics, 0.1% increase in soil organic matter, wheat yield can increase 26 kg. Improve soil organic matter content, mainly by input organic fertilizer, straw directly back to the province with workers, easy, good effect. Here is an example of returning straw to soil. The method of quantitative regulation and calculation of soil organic matter is introduced. First, the calculation of soil organic matter annual accumulation Organic matter into the soil, after a year of decomposition, retained in the soil in the amount of eagles and the amount of organic matter into the soil before the ratio, called humification coefficient. Humicrobial coefficient of organic matter is generally between 0.2-0.5. Such as corn stalk humus coefficient of 0.2,