青海湖南侧江西沟土壤水分研究  

Soil Moisture Status in Jiangxigou in the South of Qinghai Lake

作　　者：成爱芳[1] 赵景波[1,2] 曹军骥[2] 胡健[1] 侯雨乐[1] 阴雷鹏[1] 

机构地区：[1]陕西师范大学旅游与环境学院,陕西西安710062 [2]中国科学院地球环境研究所黄土与第四纪地质国家重点实验室,陕西西安710075

出　　处：《水土保持通报》2011年第3期75-80,共6页Bulletin of Soil and Water Conservation

基　　金：陕西师范大学研究生创新基金项目"青海湖周边土壤水环境研究"(2010CXS014);国家科技支撑计划项目"青海湖流域生态和环境综合监测与评估技术"(2007BAC30B01)

摘　　要：根据含水量和粒度测定,对青藏高原东部的青海湖南侧土壤水分含量特征、土壤干层与草原发育的适宜性和土壤水库等问题进行了研究。结果表明,青海湖南侧土壤含水量随深度增加呈现减小的趋势,在土壤1.0 m左右深度以下有长期性土壤干层发育;从上向下土壤干层发育强度呈现加重趋势,由轻度干层变为中度干层,这主要与气候暖干化和降水量少有关。虽然该区丰水年土壤剖面上部的水分明显升高,但还没有使土壤干层中的水分得到全部恢复。青海湖南侧土壤是与黄土相似的粉沙土,但该区土层较薄,土壤水库的调蓄能力较小。土壤干层的发育和较弱的土壤蓄水能力指示该区不适于植树造林,适宜发展消耗水分较少的草原植被。Based on determinations of soil moisture content and particle size,the features of soil moisture content,dried soil layer,the suitability of grassland development,soil reservoir and so on were studied in the south of the Qinghai Lake in the Eastern Tibetan Plateau.The results indicate that the soil moisture content increased with depth.Permanently dried soil layer developed at the depth of about 1 m.Soil layers were increasingly dry with depth;weakly dried soil layer shifted to moderately dried soil layer from upper to lower parts of soil profiles,which could be related to the warming and drying climate and low precipitation.Although during rainy year the moisture contents of the upper soil profile were significantly higher,the dried soil layers could not receive enough water to restore in this area.The soil texture of the South Qinghai Lake was similar to silty soils found in the Loess Plateau.However,the soil was shallow,resulting in soil reservoir of poor adjustment ability.The dried soil layer and poor soil reservoir suggested that grassland vegetation consuming less moisture are more preferable than forests in this area.

关 键 词：土壤含水量 土壤干层 土壤水库 丰水年 青海湖南部 

分 类 号：S152.7[农业科学—土壤学]