水土保持学报2011，Vol.25Issue(1)：64-69,91,7.
缙云山不同植被类型林下土壤养分含量及物理性质研究
Investigation of Nutrients and Physical Properties of the Soil under Different Types of Forest Vegetation in Jinyun Mountain
摘要
Abstract
The nutrient content, physical properties of the soil under various plants communities in the Jinyun mountain were studied by means of field survey and laboratory analysis. The results showed that:(1) pH value increased with soil depth, while the amount of organic matter and soil organic carbon decreased gradually; Soil total nutrients, without total potassium in evergreen broadleaved forest, evergreen conifer and broad-leaved mixed forestand shrubs, also decreased with depth; (3)the greatest content of alkali-hydrolyzed nitrogen and available P was in shrubs,and rapidly available potassium in evergreen broadleaved forest. The soil texture is light clay in shrubs, mixed forest and cultivated land and loam in evergreen broadleaved forest,phyllostachys edulis forest, physical clay content (＜0.01 mm) appeared in the sequence of cultivated land (68.34％)＞ shrubs(62.38％)＞ mixed forest(56.82％)＞ evergreen broadleaved forest(51.78％)＞ phyllostachys edulis forest(24.52％)in A layers. The soil porosity was 56.82％～78.23％, and noncapillary porosity, appeared in the sequence of shrubs＞ mixed forest ＞ phyllostachys edulis forest ＞ evergreen broadleaved forest ＞ cultivated land, was 11.31 ％～16.21％. Soil micro-aggregates mainly distributed in the layer of 0.01～0.5 mm, and the aggregation in A layers was made as follows: shrubs(57. 45％)＞cultivated land (53.85 ％) ＞mixed forest (50. 16 ％) ＞ evergreen broadleaved forest (31.46 ％) ＞ phyllostachys edulis forest (6.4 ％), and the order of the dispersion coefficient was shrubs(15. 82 ％)＜cultivated land (21.02 ％)＜mixed forest (36.43 ％) ＜evergreen broadleaved forest (42.74 ％) ＜phyllostachys edulis forest (43.17 ％). This paper provides theory for utilization of forest and eco-environment construction in three gorge reservoir area.关键词
森林土壤/机械组成/微团聚体/土壤肥力/缙云山Key words
forest soil/ mechanical composition/ micro-aggregates/ soil fertility/ Jinyun mountain分类
农业科技引用本文复制引用
罗歆,代数,何丙辉,刘秀华,唐寅..缙云山不同植被类型林下土壤养分含量及物理性质研究[J].水土保持学报,2011,25(1):64-69,91,7.基金项目
国家自然科学基金(40971166) （40971166）
重庆市科技攻关重点项目(CSTC2009AB1115) （CSTC2009AB1115）
国家科技重大专项子课题(2009ZX07104-002-06) （2009ZX07104-002-06）
西南大学生态学重点学科"211工程"建设项目 （）
