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一般说来,土壤有机质含量与土壤肥力高低成正相关,但是,并不是所有土壤都是这样的。上海郊区的青紫泥,有机质含量达44％以上,但它的供肥能力却不如有机质含量为2～3％的黄泥头土壤。这就说明,有的土壤其肥力的高低,不单决定于有机质的多寡,而与有机质的质量密切相关。目前,土壤有机质质量评价和分级已成为人们比较关注的问题。本文试图通过测定易氧化有机质的量来评价土壤有机质的质量。试验方法我们采用不同浓度重铬酸钾(0.2N,0.4N)和硫酸(1:3、1:1),在不同温度下
In general, soil organic matter content is positively correlated with soil fertility, but not all soils are. Purple suburbs in Shanghai, the organic matter content of 44% or more, but its ability to supply fat as organic matter content of 2 to 3% of Wong Nai Tau soil. This shows that some soil fertility level, not only depends on the amount of organic matter, but with the quality of organic matter is closely related. At present, the evaluation and classification of soil organic matter quality has become a concern of people. This article attempts to assess the quality of soil organic matter by measuring the amount of readily oxidizable organic matter. Test Methods We used different concentrations of potassium dichromate (0.2N, 0.4N) and sulfuric acid (1: 3, 1: 1) at different temperatures