安徽査湾甜槠林林隙及林下土壤养分对比  

Soil Nutrients in Forest Gaps and Understory in Castanopsis eyrei Stands in Zhawan Nature Reserve of Anhui Province

作　　者：江国华 吴泽民[2] 

机构地区：[1]安徽宣城职业技术学院,宣城242000 [2]安徽农业大学

出　　处：《东北林业大学学报》2012年第10期89-92,130,共5页Journal of Northeast Forestry University

基　　金：国家“十一五”科技支撑项目(2006BAD03A06)资助

摘　　要：对安徽査湾甜槠林林隙与林下土壤水分和养分进行了对比研究。结果表明:林隙土壤含水量垂直方向上随土层深度增加而递减;水平方向上,由林隙中心区往林下,土壤含水量呈递减趋势,说明林隙土壤的保水能力加强。林隙内外土壤pH值差异不大,林隙内pH值均略高于非林隙林分下相应各层;除表层外,土壤pH值在垂直方向上随土层深度的增加而增加;但土壤养分在垂直方向上分布规律差异较大,除了全钾质量分数由表层依次向下逐渐递增以外,其它各种养分均为逐渐递减,而且其它各养分在表层的含量明显高于其它土层的含量。林下土壤的有机质、全氮、碱解氮、速效磷、速效钾质量分数均高于林隙,而全磷、全钾质量分数是林隙高于林下。An experiment was conducted to study the soil water content and nutrients in forest gaps and understory in Castanopsis eyrei stands in Zhawan Nature Reserve of Anhui Province. Results showed that soil water content decreased with soil depth, and it decreased from the center of forest gap to the understory, indicating that the soil in forest gap had better water holding capability. Soil pH in the forest gap was slightly higher than that in corresponding layer of understory, and soil pH increased with soil depth except for litter layer. The distribution of soil nutrients in vertical direction was different, that is, the content of total potassium increased with soil depth, while the contents of other nutrients decreased with soil depth, and the nutrient contents in the surface layer were obviously higher than those in other layers. The contents of soil organic mat- ter, total nitrogen, alkaline hydrolytic nitrogen, available phosphorus and available potassium under the canopy were high- er than those in the forest gap, while the contents of total phosphorus and total potassium were higher in the forest gap com- pared with the understory.

关 键 词：甜槠林 林隙 土壤养分 安徽查湾 

分 类 号：S757[农业科学—森林经理学]