水土保持学报2012，Vol.26Issue(4)：194-198,220,6.
甘南尕海不同湿地类型土壤物理特性及其水源涵养功能
Soil Physical Characteristics and Water Conservation Function for Four Main Wetland Types in Gahai of Gannan
摘要
Abstract
The soil physical properties and water conservation function of 4 types of wetland were studied in Gahai, Gannan. Results indicate that there are great differences in soil particle composition, soil bulk density and soil porosity for the different wetland types, and they are fluctuating changes with the increase in soil depth~ the average level of thick sand of soil for herbaceous peats, permanent marsh wetlands and mountain wetlands is 63.00~, 46.47% and 37.60~ respectively; fine sand for mountain wetlands, permanent marsh and herbaceous peats is 62.40~, 53.53~ and 33.63~; the average soil bulk density of permanent marsh wetlands（0.49 g/cm~）, mountain wetlands（0.90 g/cma） and subalpine meadows（1.29 g/cm3） is about 2, 4, 6 times that of herbaceous peats（0.22 g/em3） ; the total soil porosity is shown as： Herbaceous peats 〉per- manent marsh wetlands 〉mountain wetlands 〉subalpine meadows~ the non-capillary porosity is shown as： Herbaceous peats 〉subalpine meadows 〉mountain wetlands 〉permanent marsh wetlands~ the average level of maximum water holding quantity of soil for herbaceous peats, permanent marsh wetlands, mountain wet- lands and subalpine meadows is 13 143.94 t/hm2 , 11 640.19 t/hm2 , 9 060.79 t/hm2 and 7 391.80 t/hm2 re- spectively; non-capillary water holding quantity of soil for herbaceous peats, subalpine meadows, mountain wetlands and permanent marsh wetlands is 937.67 t/hm2, 598.50 t/hm2, 594.67 t/hm2 and 325.13 t/hm2 respectively the average water draught capacity of soil for subalpine meadows, permanent marsh wetlands, mountain wetlands and herbaceous peats is 51.49 mm, 49.66 mm, 43.42 mm and 22.45 mm respectively. The function of water conservation for herbaceous peats is the best and the function of water draught for subalpine meadows is the best in Gahai of Gannan.关键词
甘南尕海/湿地类型/土壤物理特性/水源涵养功能Key words
Gahai of Gannan wetland types soil physical properties/water conservation function分类
农业科技引用本文复制引用
马维伟,王辉,王修华,王元峰,赵赫然..甘南尕海不同湿地类型土壤物理特性及其水源涵养功能[J].水土保持学报,2012,26(4):194-198,220,6.基金项目
甘肃省教育厅项目 （）
甘肃农业大学盛彤笙科技创新项目 （）
