干旱区生态环境知识资源中心(Arid): 北方农牧交错带土地利用现状对生态环境变化的影响以内蒙古多伦县为例

Arid

	北方农牧交错带土地利用现状对生态环境变化的影响以内蒙古多伦县为例
其他题名	The effects of land use change on the eco-environmental evolution of farming-pastoral region in Northern China: With an emphasis on Duolun County in Inner Mongolia
	刘全友; 童依平
来源期刊	生态学报
ISSN	1000-0933
出版年	2003
卷号	23 期号:5 页码:1025-1030
中文摘要	主要研究内蒙古典型地区多伦县土地利用现状对生态环境变化的影响，主要包括土地利用方式、程度和效率等.研究表明：在近一个时期，该地区人口在不断增长，土地利用结构在不断变化，如自1983年到1999年期间，其耕地由原来的18.83%上升到32.09%，增长了13.26%；而草地由原来的51.79%降到36.13%,消减了15.66%；林业用地由原来的4.16%降到2.87%，下降了1.29%，这种结构性的变化，致使植被、林地在减少，草原在退化。如20世纪50年代最高产草量（鲜重)可达7500kg/hm~2，到1983年下降到3000kg/hm~2，而现在只有1500kg/hm~2；而这种草场退化结果又导致农田沙化，肥力下降，如农田比草地土壤有机质低50%左右,而N、P、Zn等其他元素在30%左右；草地与沙化草地相比，有机质、N、P、Zn的含量普遍低20%～50%。为此，在本区必须进行土地分类和土地潜力分类为主的土地利用评价，以满足土地得以合理利用和自然保护等现代土地利用规划的需要，使生态环境得以良性循环。
英文摘要	The north farming-pastoral region is the most sensitive eco-environmental area in China. Land use changes play important roles in eco-environmental evolution in this area. Understanding how land use changes influence the eco-environmental evolution will help China to improve the eco-environmental quality of this area and it’s neighboring areas. In this paper we use Duolun County as an example to investigate how land use changed in the past 50 years, and how these changes affected the quality of eco-environmental system in this area. Duolun County is a typical region in the north farming-pastoral region, it locates in the south of the Inner Mongolia, and about 400 km from north of Beijing. Duolun County occupies 3873 km2 land, the annual average temperature is 1. 5°C, and the annual average rainfall is about 385. 5mm. Our study suggests that the land use has greatly changed since 1950s, especially after 1980 in Duolun County. From the beginning of 1980s to present, the arable land area increased from 18. 8% to 32. 1% of the total land area, grassland area decreased from 51. 8% to 36. 1%, forest area decreased from 4. 2% to 2. 2%. The land use changes, the long term low input and overuse of arable land and grassland resulted in the degradation of soils and deterioration of eco-environment. Data from 60 soil samples around Duolun county show that most of the arable land and grassland are deficient in N> P, Zn; Mn, B. and Mo, low input and overuse of soil resources resulted in desertification of large area of cropland and grassland, and reduced soil organic matter and available N, P, Zn content by 20%~50%. As a result of soil degradation, the crop and grass yields are very low. For example, the maximum grass yield (fresh weight) was 7500. 3000 and 1500 kg/hm2 in 1950s, 1983 and present respectively. The low yields require more grassland to be cultivated to meet the growing requirement of food and feedstuff, and further deteriorate the eco-environment. To stop the deterioration of the eco-environment, and improve the quality of the eco-system, land potentials evaluation, and land use classifying are urgently needed.
中文关键词	北方农牧交错带 ; 土地利用 ; 生态环境变化
英文关键词	the transitional agro-pasture area land use change eco-environmental evolution
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:1259976
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204280
作者单位	中国科学院生态环境研究中心, 北京 100085, 中国
推荐引用方式 GB/T 7714	刘全友,童依平. 北方农牧交错带土地利用现状对生态环境变化的影响以内蒙古多伦县为例[J],2003,23(5):1025-1030.
APA	刘全友,&童依平.(2003).北方农牧交错带土地利用现状对生态环境变化的影响以内蒙古多伦县为例.生态学报,23(5),1025-1030.
MLA	刘全友,et al."北方农牧交错带土地利用现状对生态环境变化的影响以内蒙古多伦县为例".生态学报 23.5(2003):1025-1030.