摘要
在宁夏南部半干旱黄土丘陵区，选择具有典型代表性的人工草地和天然草地，采用野外调查采样与室内分析相结合法，分析在植被生态恢复过程中土壤水分特征的变化．结果表明：土壤容质量人工草地〉天然草地，饱和含水量、田间持水量和毛管持水量等天然草地〉人工草地；在土壤蓄水性能方面表现为天然草地在涵蓄降水量、有效涵蓄量2方面优于人工草地；用O～100cm土壤水分无论人工草地还是天然草地（1—10月）都表现有亏缺状态．
Soil water physical characteristics were studied during the vegetation restoration period in the southern semi-arid region of Ningxia, and differences of soil water physical properties under different vegetation types were observed. The bulk density of artificial grassland was higher than that of nature grassland; however, soil saturation supporting water capacity, soil field water capacity and soil capillary supporting water capacity of nature grassland were lower than that of artificial grassland. But 0-100 cm soil saturation water storage of artificial grassland was higher than that of nature grassland, while the available soil water storage of nature grassland was higher than that of artificial grassland . The change of soil precipitation storage was similar with the change of the available soil water storage. 0-100 cm soil profile, there exist soil water deficits not only in artificial grassland but also in nature grassland （from January to October）. The deficit value of soil water in the nature grassland is larger than that of the artificial grassland.
出处
《农业科学研究》
2007年第3期5-9,共5页
Journal of Agricultural Sciences
基金
国家"十五"科技攻关计划重大项目(2004BA606-04)资助
关键词
黄土丘陵半干旱区
草地
土壤水分物理特征
土壤蓄水性能
水分亏缺
semi-arid region of loess plateau
grassland
soil water physical properties
soil water storagecapacity characteristics
soil water deficits
