摘要
在浑善达克沙地南缘,以围封7年的沙化草地以及围栏外周围不同地段作为研究对象,通过对比分析围栏外不同地段,草地群落特征及土壤根系含量,并以围栏内草地作对照,对围封沙化草地的“种子岛”效应进行了尝试性研究。结果表明:围封沙化草地有显著的“种子岛”效应,且这一效应约在围栏500 m外逐渐消失。另外,这一效应还显示出,围封沙化草地具有以围栏为中心,成辐射状促进周边草地植被恢复的作用。
In the south edge of Hunshandake sand, the seed source effect of enclosed sandy grassland is tentatively researched by contrasting the grassland community＇s characteristics and grass root content in different places grassland out of fence and the grassland which was enclosed for 7 years as contrast. The results show that the seed source effect of enclosed sandy grassland is dramatic, and the effect is fade-away out of fence for 500 m. In addition, the seed source effect also indicates that enclosed sandy grassland can restore radially the vegetation around.
出处
《水土保持研究》
CSCD
北大核心
2006年第3期255-257,261,共4页
Research of Soil and Water Conservation
基金
十五"国家科技攻关课题"沙区农田
草地土壤风蚀防治技术研究(2002BA517A-10)
