黄土丘陵区坡面林—草边界土壤养分特征  

Soil Nutrient Characteristics Across Forest-grassland Landscape Boundary in Slope Forest of Loess Plateau

作　　者：云丽丽[1] 尤文忠[1] 

机构地区：[1]辽宁省林业科学研究院,沈阳110032

出　　处：《林业科技》2009年第6期17-20,共4页Forestry Science & Technology

基　　金：国家重点基础研究发展规划资助项目(2002CB111506)

摘　　要：应用定位、连续观测的方法,对黄土丘陵区刺槐林-草地复合系统景观边界不同季节时期土壤养分因子进行测定和分析的结果表明,林-草边界土壤有机质、有效P、有效K含量在生长季末期含量最高,而土壤有效N含量在生长季前期含量最高。应用主成分分析的方法,对3个时期的边界土壤养分综合影响边缘效应的位置与宽度进行了判定,结果表明:林-草边界土壤养分综合因子具有较明显的边缘效应位置与宽度,生长季、生长季末期土壤养分综合影响边缘效应的位置都为从林内8m到林外4m、宽度12m,生长季前期土壤养分综合影响边缘效应的位置为从林内4m到林外8m、宽度12m。By making settled plot and continuous observauon, grassland landscape boundary in hilly area of loess plateau in different seasons were measured. The contents of soil organic matter, available P and available K across boundary showed bigger in the stage after growing season. On the other hand, the content of available N across boundary showed bigger in the stage before growing season. By the method of principal component analysis, quantitation determinations of the location and the depth of edge effect for soil nutrient were obtained in 3 seasons. The results showed that the location of thc edge effect of soil nutrient lied in 8 m exterior to 4 m in the stages of growing season and after growing season, and the depth of edge effect was 12 m. In the stage of before growing season, the location of the edge effect of soil nutrient lied in 4 m exterior to 8 m, and the depth of edge effect was also 12 m.

关 键 词：林-草 边界 土壤养分 边缘效应 

分 类 号：S714[农业科学—林学] S717.192