干旱区生态环境知识资源中心(Arid): 呼伦贝尔天然草地地貌部位对土层厚度和土壤水分的影响

Arid

	呼伦贝尔天然草地地貌部位对土层厚度和土壤水分的影响
其他题名	Effects of slope position on soil water content and soil depth in the Hulunbeier grassland
	徐学军 1; 刘洪鹄 2; 张平仓 2
来源期刊	干旱区资源与环境
ISSN	1003-7578
出版年	2010
卷号	24 期号:4 页码:180-184
中文摘要	草原开垦破坏草地植被,并且破坏了整个草原的生态环境,这已取得共识. 然而,目前还有人想开垦呼伦贝尔天然草地来追求短期的利益. 通过调查一个天然草地坡面的土层厚度和土壤水分,分析天然草地地貌部位对土层厚度和土壤水分的影响,以此为根据来阐述开垦天然草地的利害. 结果表明:上部样点含水量低,坡脚和坡底样点含水量依次增加;黑土层保水性好,黄粘土层透水性差,砂土层保水性很差;坡面80%的面积黑土层小于或等于30cm,开垦压实以后厚度只能满足暂时耕作的需要. 呼伦贝尔草原地形起伏较大,干旱且多大风,易发生土壤侵蚀. 开垦以后将会失去保水性好的黑土层,那时,呼伦贝尔草原前景甚忧. 因此,建议不应开垦呼伦贝尔草原,并给与适当保护.
英文摘要	Hulunbeier grassland is very important for china’s non-pollution animal food. Additionally, it is a ecological barrier for Northeast China and North China. If it was destroyed, environment in Northeast and North China would be in danger. It is well known that cultivated grassland destroys vegetation, and damages the ecological environment of the grassland. However, currently some people always want to cultivate natural grassland for short-term economical profit. The purpose of this study is to analyze the character of soil water content and soil depth along a slope, and simply describe the advantages and disadvantages of cultivated grassland. The soil water content and soil depth of a slope was surveyed in Chenbaerhu County. The results showed: black soil layer (surface layer) has the high capacity holding water, yellow clay soil layer has the low permeability, and sand layer has the low capacity for holding water; soil depth is less than or equal to 30 cm in 80% of the slope, which is only adapted for the current tillage depth after reclamation and compaction. Hulunbeier grassland has a rolling relief and highintensity winds. Thus, soil erosion often appears and results in a lot of soil loss. If black soil layer was eroded, soil water content and nutrients would not be enough to support plant growth. At last, desertification might be serious in the hulunbeier grassland. Thus, it is suggested that grassland should be not cultivated.
中文关键词	呼伦贝尔 ; 天然草地 ; 土层厚度 ; 土壤水分 ; 土壤侵蚀
英文关键词	Hulunbeier natural grassland soil layer depth soil water content soil erosion
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:3920475
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/225130
作者单位	1.长江水利委员会长江勘测规划设计研究院, 武汉, 湖北 430010, 中国; 2.长江水利委员会长江科学院, 武汉, 湖北 430010, 中国
推荐引用方式 GB/T 7714	徐学军,刘洪鹄,张平仓. 呼伦贝尔天然草地地貌部位对土层厚度和土壤水分的影响[J],2010,24(4):180-184.
APA	徐学军,刘洪鹄,&张平仓.(2010).呼伦贝尔天然草地地貌部位对土层厚度和土壤水分的影响.干旱区资源与环境,24(4),180-184.
MLA	徐学军,et al."呼伦贝尔天然草地地貌部位对土层厚度和土壤水分的影响".干旱区资源与环境 24.4(2010):180-184.