干旱区生态环境知识资源中心(Arid): 半干旱区气候变化背景下近20年内蒙古武川县耕地质量变化

Arid

	半干旱区气候变化背景下近20年内蒙古武川县耕地质量变化
其他题名	Cultivated land quality change of Wuchuan county in Inner Mongolia under background of climate change in semi-arid regions during recent 20 years
	王立为 1; 安萍莉 2; 潘志华 1; 赫迪 1; 董智强 1
来源期刊	农业工程学报
ISSN	1002-6819
出版年	2013
卷号	29 期号:11 页码:224-231
中文摘要	耕地质量是国家经济和社会可持续发展的关键因素,气候变化引起的耕地质量变化已成为全球变化研究的热点问题之一。该文以我国北方典型半干旱气候敏感区武川县为例,利用19892009年历史气候数据和土地利用资料,研究了气候变化对生产潜力、标准耕作制度和产量的影响,在此基础上进一步研究了武川县耕地自然质量等指数和土地利用等指数的变化情况。结果表明:武川县气候呈显著干暖化趋势,在其影响下,武川县耕地自然质量等指数呈下降趋势,水分是制约自然质量等指数的关键因素;旱地土地利用等指数呈下降趋势,水浇地土地利用等指数则呈上升趋势。该研究能够为气候变化背景下制定土地利用制度,保护和提高耕地质量提供科学依据。
英文摘要	Cultivated land quality is a key factor of national economic and social sustainable development. The change of cultivated land quality with climate change has become one of the hot research areas in global change in recent years. Based on the meteorological data, soil information and field experimental data were used, utilizing the Wageninngen method recommended by the Food and Agriculture Organization (FAO) to calculate the potential productivity of potato and spring wheat from 1989 to 2009 in Wuchuan County, Inner Mongolia, a typical semi-arid climate-sensitive area in North China. We examined the influence of climate change on production potential, the standard cropping system, and the yield. Further, by the method of regulations of Farmland classification, we used the data of potential productivity and land use to analyze the changes of natural quality grades and utilization grades under climate change. The results showed that: (1) The annual temperature of Wuchuan County increased at an average rate of 0.57℃/10a during 1967-2009. The precipitation varied greatly among the years, and the annual precipitation declined slightly over time. The soil relative humidity in soil layers 0-10 cm and 10-20 cm depth in crop growing season (April-September) in the period 1989-2009 had a decreasing trend with an average rate of 1.8%/a and 1.5%/a, respectively. Drought index increased noticeably. In conclusion, Wuchuan County was getting warmer and dryer under climate change. (2) Most of the cultivated lands were the dry lands in Wuchuan county (accounting for more than 90%), but the irrigated lands increased in recent years. The main crop in Wuchuan county was potatoes in 2009 instead of spring wheat in 1989. The planting area of potatoes increased from 8.4% to 39.8%, while spring wheat planting area decreasing from 52.1% to 17.1% in the period 1989-2009. (3) The production potential of the potatoes and spring wheat showed a declining trend under the dry warming climate in Wuchuan county. The production potential of potatoes decreased more obviously than spring wheat. Precipitation was the main factor affecting the production potential of potatoes and spring wheat. The natural quality grade index of dry land and irrigated land in the period 1989-2009 had anobviously decreasing trend with an average rate of 2.1/a and 0.5/a, respectively. The natural quality index of irrigated land was significantly higher than that of dry land. The dry land utilization grade index showed a descending trend, but the irrigated land utilization grade index showed a rising trend. The utilization grade index of the irrigated land was also significantly higher than that of the dry land, and the influence of climate change in the dry land was greater than in the irrigated land. However, the effect of land utilization by human activities in the irrigated land was greater. Therefore, as a comparative system between dry land quality and irrigated land quality, water is the major constraint to the cultivated land quality grade. This research can provide the scientific basis for formulation of the land-use system, protection and improvement of the quality of cultivated land under the background of climate change.
中文关键词	气候变化 ; 土地利用 ; 干旱区 ; 耕地质量 ; 自然质量等指数 ; 土地利用等指数
英文关键词	climate change land use arid regions cultivated land quality natural quality grade index utilization grade index
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:4852649
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/229887
作者单位	1.中国农业大学资源与环境学院, 北京 100193, 中国; 2.中国农业大学资源与环境学院, 国土资源部农用地质量与监控重点实验室, 北京 100193, 中国
推荐引用方式 GB/T 7714	王立为,安萍莉,潘志华,等. 半干旱区气候变化背景下近20年内蒙古武川县耕地质量变化[J]. 中国农业大学,2013,29(11):224-231.
APA	王立为,安萍莉,潘志华,赫迪,&董智强.(2013).半干旱区气候变化背景下近20年内蒙古武川县耕地质量变化.农业工程学报,29(11),224-231.
MLA	王立为,et al."半干旱区气候变化背景下近20年内蒙古武川县耕地质量变化".农业工程学报 29.11(2013):224-231.