紫色水稻土有机无机复合与土粒团聚的关系  

REIATIONSHIP BETWEEN ORGANO-MINERAL COMPLEXING AND SOIL PARTICLE AGGREGATION IN PADDY SOILS DEVELOPED FROM PURPLE SOILS

作　　者：魏朝富[1] 谢德体[1] 陈世正[1] 

机构地区：[1]西南农业大学土化系

出　　处：《土壤学报》1996年第1期70-77,共8页Acta Pedologica Sinica

摘　　要：紫色水稻土的原土复合量（重组腐殖质）为中性土＞钙质土＞酸性土，同一土壤剖面中其含量是随土层深度下降；而有机无机复合度为钙质土＞中性、酸性土，在土壤剖面中是随土层深度增加。＜０．０１ｍｍ土粒团聚量和＜０．０１ｍｍ土粒团聚度为钙质土＞中性土＞酸性土。原土复合量和有机质含量，物理性粘粒含量、铁氧化物含量与＜０．０１ｍｍ土粒团聚量呈显著正相关；而有机无机复合度与有机质含量呈显著负相关，与腐殖质结合状态，物理性粘粒含量和＜０．０１ｍｍ土粒团聚度间无显著相关性。土壤有机质在上粒团聚中，是与矿物质呈复合状态的腐殖质（原土复合量）起作用，而原上复合量的多少很大程度上决定了＜０．０１ｍｍ土粒团聚量。有机无机复合和土粒团聚的关系是通过原土复合量和＜０．０１ｍｍ土粒团聚量间的关系来体现的。The content of soil complexing in paddy soils developed from purple soils appears in the sequence of neutral soils>calcareous soils>acid soils and decreases with depth of soil layer,while the degree of organo-mineral complexing is in the order of calcareous soils>neutral and acid soils and increases with the depth of soil layer.content and degree of <0.01mm soil particle aggregation are in the sequence of calcareous soil > neutral soils>acid soils.The content of soil complexing is positively related with the contents of organic matter,physical clay,Fe oxide and <0.01mm soil particle aggregation.But the degree of organo-mineral complexing is negatively related to content of organic matter,but insigificantly related to the combined forms of humus,the content of physical clay and the degree of<0.01mm soil particle aggregation.The complexing humus with mineral(content of soil complexing) in soil organic matter plays an important role.in soil particle aggregation.The content of<0.01mm soil particle aggregation depends on the content of soil complexing to a great extent. The relationship between complexing of organo-mineral and aggregation of soil particle is reflected by the relationship between the content of soil complexing and the content of <0.01mm soil particle aggregation.

关 键 词：有机无机复合 土粒团聚 紫色水稻土 

分 类 号：S152.482[农业科学—土壤学] S155.32[农业科学—农业基础科学]