干旱区生态环境知识资源中心(Arid): 陇东黄土高原农牧交错带土地荒漠化驱动因子的定量分析

Arid

	陇东黄土高原农牧交错带土地荒漠化驱动因子的定量分析
其他题名	Quantitative Analysis of Driving Factors on Desertification in Agriculture Pasture Ecotone of Longdong Region of Loess Plateau of China
	张希彪 1; 王东 2
来源期刊	土壤通报
ISSN	0564-3945
出版年	2013
卷号	44 期号:2 页码:296-301
中文摘要	以农牧交错带南部的甘肃省环县为研究对象,以1949~2010年共61年的16个自然和社会经济统计数据为样本,采用主成分分析法,对引起土地荒漠化的自然因子与人为因子进行了定量分析。结果表明:(1)在环县土地荒漠化发展过程中,人为因素的贡献率为53.77%,自然因素的贡献率为21.79%,自然与人为因素共同作用的贡献率为6.76%。在环县60年的荒漠化发展过程中,人为因子的影响处于较高水平,单独的自然因素以及自然和人为因素共同的作用强度较低;(2)在环县荒漠化发生发展过程中起决定作用的是人类活动,气候条件对于荒漠化的发展只起影响作用而不是决定作用。其中自然因子的影响主要是气温持续升高、降雨量减少、空气相对湿度下降、蒸发量增大导致干旱和土壤干层的发育,抑制了植物的生长,降低了植被覆盖度及土壤的抗冲蚀能力。而较强的风力及暴雨量的增加加速了土壤侵蚀;人为因子的影响主要是人口急剧增长、农业人口过大、大面积垦殖导致不合理的土地利用,以及超载放牧引起草场大面积退化直接导致了环县土地荒漠化扩展。
英文摘要	Taking Huan County of Gansu province located in the south part of agriculture pasture ecotone as a research subject, a quantitative analysis on the natural factor and anthropogenic factor of desertification are investigated by principal component analysis with 16 sets of data as sample, which including social (natural factor) and economic (anthropogenic factor) data from 1949 to 2010. Results show that: 1) During the process of desertification in Huan County, natural and human factors contribution rates are 53.77% and 21.79%, respectively, and their combined contribution rate is up to 6.76%. In this process, the impacts of anthropogenic human factor are relatively strong while the solo natural factor or natural-anthropogenic interaction is relatively weak; 2) during the process of desertification, human activity plays a decisive role while climate condition affects the desertification process to a lesser extent. The impacts of natural factors include drought and development of soil dried layers, inhibition of crop’s growth, decreases of vegetation fraction and soil erosion resistance ability caused by continuous rise of temperature, rainfall decrease and low air moisture, as well as higher evaporation discharge. And the strong wind and torrential rain accelerate soil erosion. Anthropogenic factors include rapid increment of population and excess of agricultural population, large acreage of soil exploitation resulting irrational land usage, and large area of grassland deterioration caused by overgraze, which directly bringing about the extension of desertification of Huan County.
中文关键词	土地荒漠化 ; 自然因素 ; 人为因素 ; 定量分析 ; 黄土丘陵沟壑区 ; 农牧交错带
英文关键词	Soil desertification Natural factor Anthropogenic factor Quantitative analysis Hilly and gully region of the Loess plateau Agriculture pasture ecotone
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURAL ECONOMICS POLICY
WOS研究方向	Agriculture
CSCD记录号	CSCD:4794206
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230239
作者单位	1.陇东学院, 甘肃省高校陇东生物资源保护与利用省级重点实验室;;黄土高原土壤侵蚀与旱地农业国家重点实验室, 庆阳, 甘肃 745000, 中国; 2.陇东学院, 甘肃省高校陇东生物资源保护与利用省级重点实验室, 庆阳, 甘肃 745000, 中国
推荐引用方式 GB/T 7714	张希彪,王东. 陇东黄土高原农牧交错带土地荒漠化驱动因子的定量分析[J],2013,44(2):296-301.
APA	张希彪,&王东.(2013).陇东黄土高原农牧交错带土地荒漠化驱动因子的定量分析.土壤通报,44(2),296-301.
MLA	张希彪,et al."陇东黄土高原农牧交错带土地荒漠化驱动因子的定量分析".土壤通报 44.2(2013):296-301.