摘要
为了给石漠化地区的治理提供依据,采用测定土壤理化指标和植被样方调查相结合的方法对具有代表性的晴隆县孟寨小流域的21个村39个样方进行土壤特征分析。结果表明:1)人工种草可以增加土壤养分,提高土壤有效磷的含量。2)植被盖度,人工草丛>天然灌丛>土壤草丛;植被鲜重,人工草丛>土壤草丛>天然灌丛。其中,人工草丛的植被盖度与鲜重远远超过天然草丛和天然灌丛。3)该地区植被生长不受土壤养分的限制。结论:在人工种草时,应适当增大种植密度,可以获得较高的生产力。
In order to provide a basis for the management of rock desertification, soil indexes and quadrat survey were combined to investigate Qinglong County with typical rock desertification. 39 quadrats from 29 villages in Mengzhai watershed within the county were investigated. The results showed that： 1） soil nutrient contents and effective phosphorus content were increased by cultivating grass. 2） Vegetation coverage, artificial grass）natural grass） bushes; Fresh weight, artificial grass）bushes）natural grass. The vegetation coverage and fresh weight of artificial grass were far beyond that of natural grass and bushes. 3） The soil nutrient contents did not limit the growth of vegetation. Therefore, properly increasing plant density could obtain more biomass during the process of cultivating glass.
出处
《贵州农业科学》
CAS
北大核心
2013年第2期127-130,共4页
Guizhou Agricultural Sciences
基金
贵州省发展和改革委员会项目"贵州省石漠化综合治理重点小流域监测"
关键词
草地植被
喀斯特
土壤养分
石漠化
人工种草
生产力
贵州
grassland vegetation karst
soil nutrient rock desertifcation artificial planting
productivity
Guizhou
