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土壤有机质与矿物质一样,同是土壤固体的重要组成部份,它是一个复杂的物质系统,包括有机肥料和动植物残体、微生物及其分解合成阶段的产物(如有机化合物和腐殖质等)。这些有机质在土壤肥力中起着重要作用。一般说来,土壤有机质含量高低是衡量土壤肥力水平的一个重要标志。一、土壤有机质的作用土壤有机质在耕作土壤中的作用是多方面的。除了代换、缓冲、刺激等作用外,主要还有以下几点; 1.有机质是作物养分的给源,能改善土壤供肥状况。土壤有机质含有氮、磷、硫、铁、钙、镁、等营养元素。它们都是作物所需
Soil organic matter, like minerals, is also an important part of soil solids. It is a complex material system that includes organic fertilizers and animal and plant debris, microorganisms and their decomposition and synthesis products (such as organic compounds and humus) . These organic matter play an important role in soil fertility. In general, the level of soil organic matter is an important indicator of soil fertility level. First, the role of soil organic matter Soil organic matter in the role of farming soil is multifaceted. In addition to substitution, buffering, stimulation and other effects, the main points are as follows: 1. Organic matter is the source of crop nutrients to improve soil fertility. Soil organic matter contains nitrogen, phosphorus, sulfur, iron, calcium, magnesium, and other nutrients. They are all crop needs