Organic manure application favours the formation of Fe-humus complexes in purple paddy soils under water-dry rotation.

在水旱轮作下，施用有机肥有利于紫色水稻土铁—腐殖质复合的形成。

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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。

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Available si content, its affecting factors and effect of si fertilization in paddy soils from purple soil in Sichuan province were studied by using fields experiments and soil incubation experiments.

通过田间试验和土壤培养试验研究了紫色水稻上有效硅含量的概况，影响因素及施硅效应。

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