摘要
以多伦县退化草地为研究对象,探讨围封措施对土壤化学性质及植被的影响。结果表明:随土层深度的增加,无论围封与否,各土壤养分指标均呈不同程度的下降;其中,围封地的有机质、pH值、全氮含量大于未围封地;而全磷、全钾含量则小于未围封地。同时,围封初期对植被盖度、高度、生物量的影响明显;但随着围封期的延长,植被盖度、草层高度、生物量的增加幅度开始下降。而围封对草地的植物种组成、种群密度和分布格局并未产生明显影响。
The influence of enclosure on soil fertility and vegetation character in the degenerative meadow is researched. The result shows： as the soil depth increasing, the soil nutrient decreases gradually, whether it is in enclosure or not. The organic matter, pH and total nitrogen in the soil which is in enclosure is more than that which is in non-enclosure. But the total phosphorus and total potassium have the opposite result. Enclosure is good for vegetation coverage, grass height and biomass at the early stage. As the enclosure time increasing, the increase degree begins to decrease. But enclosure has no marked effect on species composition, population density and spatial pattern.
出处
《内蒙古林业科技》
2008年第2期18-21,共4页
Journal of Inner Mongolia Forestry Science and Technology
基金
国家林业局中国荒漠化监测中心多伦定位站项目
关键词
围封
退化草地
土壤肥力
植被
enclosure
degenerative meadow
soil fertility
vegetation
