西南林业大学学报2016，Vol.36Issue(2)：25-30,6.DOI:10.11929/j.issn.2095-1914.2016.02.004
北京八达岭不同密度油松土壤团聚体特征研究
Effect of Stand Density on Characteristics of Soil Aggregates in Pinus tabuliformis Plantation in Badaling Area,Beijing
摘要
Abstract
To identify the effect of stand density on soil structure,fractal dimension,soil aggregate saving probability and aggregate stability index were analyzed based on field survey and sampling in three Pinus tabulifor-mis plantation with stand density of 500-800 trees/hm2 (Low density,LD),1 000 -1 200 trees/hm2 (Middle density,MD)and 1 400-1 600 trees/hm2 (High density,HD)respectively in Badaling area of Beijing.The re-sults showed that stand density had a significant influence on fractal dimension of soil aggregate (dry sieving),it was ranged from 2.62 to 2.76 with the largest in the HD Pinus tabuliformis plantations and the smallest in the LD plantations.The fractal dimension of water stable aggregate (wet sieving)was between 2.64 and 2.79 and positive-ly correlated with stand density.The smallest fractal dimension was found at the 0-10 cm layer in LD plantation and the largest one was found at the 20-30 cm depth in HD plantation.All the aggregate saving probability of the forest soil was >0.5 ,the soil aggregate of 0.5 -0.25 mm had the highest stability for the largest saving probability and soil aggregate of 1 -0.5 mm was the most unstable as it was the smallest saving probability.The aggregate sta-bility index ranged from 3.62 to 4.55 ,and decreased with the increasing of stand density.In general,Soil aggre-gate in the LD Pinus tabuliformis plantation was the most stable and was good for soil and water conservation. Therefore,we suggested stand density of 500-800 trees/hm2 of the Pinus tabuliformis plantation in the research ar-ea for improving soil aggregate structure.关键词
林分密度/团聚体特征/分形维数/油松/人工林Key words
Stand Density/characteristics of soil aggregate/fractal dimension/Pinus tabuliformis/plantation分类
农业科技引用本文复制引用
周娅,陈宇轩,邹瑞,周玮,查同刚..北京八达岭不同密度油松土壤团聚体特征研究[J].西南林业大学学报,2016,36(2):25-30,6.基金项目
林业公益性专项项目（201204102）资助；国际科技合作专项项目（2012DFA60830）资助。 （）
