摘要
采用野外定位观测法研究水蚀风蚀交错区苜蓿(Medicago sativa)草地土壤水分在天然降水作用下的恢复过程。结果显示:苜蓿地翻耕后,在降水作用下土壤水分有明显的恢复过程,第一年,150 cm以上土壤水分得到一定恢复,第二年深度达到300 cm,但上层土壤含水量并未增加;该地块植被大量消耗土壤储水导致土壤干燥化,高耗水植被消除后,土壤含水量逐渐增加。
By a field positioning observation, we studied soil moisture restoration after rainfalls in the cultivated alfalfa pasture of the wind-water erosion crisscross region of the Loess Plateau. Results show that following a rainfall the ploughed alfalfa land had obviously restored much water. In the year after the land plough, moisture of soil 150cm depth down 300cm depth from surface restored from surface restored considerably. after a rainfall, the upper soil water In the next year, though soil water of did not increase. The water consuming vegetation had ingested most of the soil water, leading to the aridity of the land. Removal of the water consuming vegetation would gradually restore the soil water.
出处
《草地学报》
CAS
CSCD
2006年第3期261-264,共4页
Acta Agrestia Sinica
基金
中国科学院水利部水土保持研究所知识创新前沿项目
关键词
水蚀风蚀交错区
苜蓿草地
土壤水分
恢复
wind-water erosion crisscross region
Cultivated alfalfa pasture
Soil moisture
Recovery
