三峡库区茶树土壤理化特性的变化  

Changes of Soil Physical and Chemical Properties of Tea Trees in Three Gorges Reservoir Areas

作　　者：贾国梅[1] 武振汝[1] 陈菽[1] 央金措[1] 张宝林[1] 

机构地区：[1]三峡大学化学与生命科学学院,湖北宜昌443002

出　　处：《安徽农业科学》2010年第4期1832-1833,1836,共3页Journal of Anhui Agricultural Sciences

基　　金：湖北省教育厅重点项目;三峡大学博士科研启动金项目;三峡大学预研基金项目

摘　　要：土壤利用和植被覆盖对生态环境有重要的影响,改善土壤物理化学特性有利于退化土地的恢复。研究发现,随着茶树生长年限的延长,0～20cm土壤含水量、阳离子代换量逐渐提高,>2.0mm水稳性团聚体数量也逐渐增多,但pH值逐渐降低;相关性分析也表明,植被恢复年限与土壤含水量(P<0.01)、阳离子交换量(P<0.05)和>2.0mm水稳性团聚体数量(P<0.01)呈显著的正相关,与pH值呈显著的负相关(P<0.01)。由此可以说明,耕地退耕后种植茶树,随着时间的延长,土壤结构得到改善,有利于减缓水土流失。Land use and vegetation coverage had important effects on the ecological environment.It was propitious to the restoration of degraded soil for improving the physical and chemical properties of soil.It was found that the water content,the positive ion exchange capacity of 0-20 cm soil increased gradually with the prolonging of the growing years of tea trees. 2.0 mm water-stable aggregates content gradually increased,whereas pH gradually decreased during the growth of tea trees.The correlation analysis also showed that the restoration years of vegetation had a significant positive correlation with soil water content（P 0.01）,positive ion exchange capacity（P 0.05） and 2.0 mm water-stable aggregates（P 0.01）.And the restoration years of vegetation had a significant negative relationship with pH value.After the cultivated land was returned to plant tea trees,the soil structure was improved with the prolonging of time,which was favorable for alleviating the soil and water loss.

关 键 词：茶树 土壤物理特性 土壤化学特性 秭归县 

分 类 号：S153[农业科学—土壤学]