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本文研究了辽宁省分布最广泛的棕壤和草甸土的不同肥力的耕地土壤有机质氧化稳定性和有机磷组分.肥地棕黄土(发育于黄土状母质的中壤质耕作棕壤)比瘦地棕黄土易氧化有机碳量高,氧化稳定系数低,冲积性壤质草甸土的情况亦相同.连续施用农肥可提高有机碳和易氧化有机碳含量,降低氧化稳定系数,从而改善土壤有机质的品质和土壤肥力.按Bowman和Cole法将土壤有机磷,分为活性有机磷、中等活性有机磷、中等抗分解有机磷、和抗分解有机磷四组,它们在棕黄土和草甸土中的比例一致,其次序是中等活性有机磷>中等抗分解有机磷>抗分解有机磷>活性有机磷.无论从绝对含量还是从组分占有机磷的百分比看,肥地的活性有机磷和中等活性有机磷都比瘦地高.由此可以看出土壤中活性有机磷和中等活性有机磷含量是衡量土壤有机质及土壤供应磷素丰缺的一项重要指标.
In this paper, the soil organic matter oxidative stability and organic phosphorus fractions of cultivated soils with different fertility levels in the most widely distributed brown earth and meadow soil in Liaoning Province were studied. The ratio of brown soil to loamy soil (medium loamy brown soil developed in loessial parent material) Oxidation of thin brown loess is characterized by high content of organic carbon, low oxidation stability coefficient, and alluvial loamy meadow soil. Continuous application of agricultural fertilizer can increase the content of organic carbon and organic carbon, decrease the oxidation stability coefficient and improve soil Organic matter and soil fertility.According to Bowman and Cole method, soil organic phosphorus was divided into four groups: active organophosphorus, moderately active organophosphorus, moderately decomposing organophosphorus and anti-decomposing organophosphorus, In the order of moderately active organic phosphorus> moderately decomposing organic phosphorus> anti-decomposing organic phosphorus> reactive organic phosphorus.In terms of the absolute content or the percentage of organic phosphorus in the component, the active organic phosphorus and Moderate activity of organic phosphorus than lean to high.Thus we can see that active organic phosphorus and soil active organic phosphorus content is a measure of soil organic matter and soil phosphorus supply and demand an important indicator of abundance Standard.