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进入土壤的各种植物残体是培肥地力的主要物质,是土壤微生物生命活动的能量来源。秸秆、根茬、绿肥在土壤中的分解、转化对土壤肥力的形成和提高起着重要作用。我们通过近二年的研究,初步了解了12种植物残体在土壤中的转化规律及其培肥效应,对今后有机肥源的合理利用是一个启迪。 (一)进入土壤的植物残体种类不同,分解率及残留在土中的有机碳量亦不同。从第一年试验资料分析,豆秸、豆科绿肥及高粱秸、茬分解速度快,分解率达76—82％,残留的有机质数量在0.5克以下(原料3克)。
All kinds of plant residues entering the soil are the main substances that fertilize the soil fertility and are the energy source for the life activities of the soil microorganisms. Stalk, stubble, green manure decomposition in the soil, the transformation of soil fertility plays an important role in the formation and improvement. Through nearly two years of research, we have initially learned about the transformation rules of 12 kinds of plant residues in soils and their effects on fertilization. It is a revelation for the rational utilization of organic fertilizers in the future. (1) The types of plant residues entering the soil are different, and the decomposition rate and the amount of organic carbon remaining in the soil are also different. From the first year of experimental data analysis, soybean straw, legume green manure and sorghum straw, stubble decomposition speed, decomposition rate of 76-82%, the residual organic matter in the amount of 0.5 grams (3 grams of raw materials).