退耕还林还草地区土壤有效水含量及蓄水性能研究——以陕西省吴旗县柴沟流域为例  

Study on Soil Water Availability and Water Storage Capacity in the Area of Upland Conversion Program——Case Study in Chaigou Watershed of Wuqi County,ShaanXi Province

作　　者：程婕[1] 白翠霞[1] 梁伟[1] 孙保平[1] 

机构地区：[1]北京林业大学水土保持学院,北京100083

出　　处：《陕西林业科技》2005年第4期1-3,26,共4页Shaanxi Forest Science and Technology

摘　　要：对陕西省吴旗县黄土丘陵沟壑区退耕还林工程区的乔木(山杏和刺槐)、灌木(荆条、沙棘)及对照农田的土壤水分有效性和蓄水能力进行了比较研究。结果表明,不同植被类型的土壤有效水含量为1.92%～15.73%,林地比农田增加约75.31%;0～40cm 土层土壤蓄水量为228.30～251.07t/hm^2,林地比农田增加约8%;刺槐林地的蓄水性能好于山杏林地。结果对于科学地评价退耕还林工程的土壤改良效益、水源涵养效益具有重要的意义。Soil water availability and water storage capacity were comparatively studied under such vegetation types as arbor （Prunus sibirica and Robinia pseudoacacia） and shrub （Vitex negundo var. heterophylla （Franch.） Reh and Hippohae rhamnoides I., with the farmland as the control. It was found that the soil water availability of different vegetations ranges from 1.92 percent to 15.73 percent, with 75.31 percent over farmland in the soil water availability for woodland. The total soil water storage within 40 cm depth ranges from 228.30 t/hm^2 to 251.07 t/hm^2, with the woodland about 8 percent over farmland in this regard. The soil water capacity of the woodland of Robinia pseudoacacia is larger than that of Prunus sibirica. The findings are of importance to the effectiveness assessment of soil improvement and water conservation in the regions of upland conversion program.

关 键 词：退耕还林工程 土壤有效水分 土壤蓄水量 

分 类 号：S714.7[农业科学—林学]