滇西北亚高山地区黄背栎林植被演替过程中的林地土壤化学响应  

Response of Soil Chemical Properties to Vegetation Succession of Quercus pannosa Forest in Subalpine Area of Northwest Yunnan

作　　者：宋洪涛[1] 张劲峰[2] 田昆[1] 郭华 陈华丽 刘忠杰 薛阳富 

机构地区：[1]西南林学院,云南昆明650224 [2]云南省林业科学院,云南昆明650204 [3]迪庆州林业科学研究所,云南香格里拉674400 [4]云南省林业技工学校,云南昆明650213

出　　处：《西部林业科学》2007年第2期65-70,共6页Journal of West China Forestry Science

基　　金：云南省十五科技攻关(2003NG14);国家自然科学基金项目(30460035);国家科技部十五科技攻关项目(2002BA901A42)共同资助

摘　　要：探讨了滇西北亚高山地区黄背栎林植被演替过程中林地土壤化学性质的变化。研究结果表明:在该植物群落不同的植被演替阶段,其林地土壤的化学性质与之相响应。随着其植被的正向演替,林地土壤各项化学指标均向良性发展:土壤的pH值逐渐降低;土壤有机质、全N及水解N含量均呈上升趋势;速效K含量在演替顶极前期达最大含量,到演替顶极期有所下降;速效P含量在演替过程中有所变化,但随其植被演替的变化不明显,没有一定的规律性;林地上层土壤养分增加较之下层土壤增加率要大。该地区土壤化学性质变化与其群落的良性发展呈正相关。The change of soil chemical properties of Quercus pannosa forest in subalpine area of northwest Yunnan was explored. The results indicated that the soil chemical properties were correlated with the different stages of vegetation succession. All the indexes of soil chemical properties showed the tendency to sound development as the progress of positive succession. The specific performance were decrease of pH value, increase of organic matter, total N and hydrolytic N. The content of available K achieved the maximum value before the climax vegetation, and slightly decreased at the climax vegetation. The change of P did not show obvious regular during the course of succession. As the succession of vegetation, the nutrient contents in the upper layer were higher than the lower layer. It is concluded that the soil chemical properties of the studied area are positively correlated with the sound development of plant community.

关 键 词：滇西北亚高山地区 黄背栎林 植被演替过程 林地土壤化学性质 

分 类 号：S714[农业科学—林学]