几种绿篱梯田中紫色土有机质组分及其性质的研究

Study on the Components of Organic Matter and Its Properties of Purple Soil in Several Hedgerow Terraces

三峡库区紫色土分布地区土壤有机质含量较低。在该区种植新银合欢、马桑、黄荆等植物篱 5年后 ,土壤有机质的含量明显增加 ;腐殖酸品质有不同程度的提高 ,HA FA值增大 ;土壤的团粒结构也有一定的改善。

The contents of organic matter in purple soil are low in the Three Gorges Reservoir Region. After the contour hedgerow had been planted for five years, the contents of soil organic matter increased prominently. The HA/FA of humic acids added, the qualities of humic matters of the contour hedgerow of Leucaena leucocephala cv. salvador, Coriaria sinica and Vitex negundo raised, which resulted in the improvement of the granular structure of the soil in some degree.