各土类腐殖质组成性质垂直变化明显。
The variation of composition and nature of every soil type humus vertical distribution is obvious.
与腐殖质组成成分最为密切的农化性状是全氮和碱解氮，其次是速效磷；
It was found that chemical properties closely related to humus compositions were the total and arailable nitrogen, and fast phosphorus.
在杏园和苹果园覆盖麦草，研究其对土壤腐殖质组成、微生物区系及土壤酶活性变化的影响。
The experiment was carried out to evaluate effects of covering wheat straw in apple orchard and apricot orchard on soil humus composition, microflora and soil enzyme activities.
本文在腐殖质组成研究基础上，提出了HM组成概念和研究方法，并比较了不同类型土壤腐殖质组成、HM组成及光学性质。
This paper presented the conception and studying methods of HM, and compared the composition and optical property of Humus and HM in different soils.
本文对黑钙土、黑土中各种作物根茬留茬与否对土壤腐殖质、土壤重组有机质的组成、结合形态及某些光学性质进行了测定。
There are few studies on the effect of crop root systems on the composition, particularly on the heavy fraction of soil humus.
结果表明，长期施肥不仅影响土壤腐殖质的含量与组成，还影响腐殖质的理化性质。
The results showed that long term fertilization affected not only the content and composition of soil humus, but also the physicochemical property of the soil humus.
研究了川中丘陵区紫色水稻土土壤腐殖质碳的剖面分布及其组成特征，探讨了土壤腐殖质与活性有机碳、土壤全氮含量的关系。
The paper studied the distribution of humus carbon in soils sections and the characteristics of humus carbon fraction of purple paddy in Mid-Sichuan Hilly Region.
研究了川中丘陵区紫色水稻土土壤腐殖质碳的剖面分布及其组成特征，探讨了土壤腐殖质与活性有机碳、土壤全氮含量的关系。
The distribution of organic carbon and labile organic carbon along soil profile in swamp soil and peat soil in Ruoergai alpine wetland were studied.
研究了川中丘陵区紫色水稻土土壤腐殖质碳的剖面分布及其组成特征，探讨了土壤腐殖质与活性有机碳、土壤全氮含量的关系。
The distribution of organic carbon and labile organic carbon along soil profile in swamp soil and peat soil in Ruoergai alpine wetland were studied.
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