摘要
对阿拉善荒漠草地恢复初期(1998—2001)植被特征和土壤养分的变化进行了研究。结果表明:草地恢复过程中,植被的盖度和生物量比封育前分别增加272%～536%和44 39%～305 3%。植被的恢复使土壤理化性质发生了变化,与封育前相比土壤中有机质、全N、速效K以及细砂、特别细砂和粘粒含量显著增加;速效N、速效P降低。土壤有机质、全N和全P的含量与土壤中<0 05mm颗粒和速效K含量呈极显著正相关,并且前三者之间也呈极显著正相关(P<0 01)。
In this paper, vegetation change and soil nutrition in the early period of restoration of desert grassland in Alxa were studied. The results showed that vegetation coverage and biomass of enclosed desert grassland increased by 272%～536% and 44\^39%～305\^5% respectively compared to those of unenclosed desert grassland under the similar environments. Vegetation restoration also resulted in the changes of soil physicochemistry properties including the significant increase in contents of organic matter, total nitrogen, available potassium, fine sand, very fine sand and clay, and the decrease in available nitrogen, phosphorus. Significantly, positive correlations were found between soil contents of organic matter, total N, total P and \{<0\^05\} mm clay particle, available K, and between contents of organic matter, total N and total P.
出处
《中国沙漠》
CSCD
北大核心
2003年第6期661-664,共4页
Journal of Desert Research
基金
国家自然科学基金西部环境生态科学研究计划(90102011)及重点项目(39730100)
国家科技部重点基础研究发展规划项目(G2000048704)共同资助
关键词
荒漠草地
植被恢复
土壤环境
土壤理化性质
desert grassland
restoration
vegetation
soil physicochemical properties
Alxa
