东北地区耕地变化对粮食生产能力的影响评价
收稿日期: 2007-06-25
修回日期: 2007-10-31
网络出版日期: 2008-06-25
基金资助
科技部科研院所社会公益研究专项(2004DIB3J092)
Impact Assessment of Cultivated Land Change upon Gr ain Productive Capacity in Nor theast China
Received date: 2007-06-25
Revised date: 2007-10-31
Online published: 2008-06-25
Supported by
Special Social Commonweal Research Programs of MOST, No.2004DIB3J092
分析研究当前区域性耕地资源数量与质量的变化格局和态势, 研究其耕地资源变化对粮食生产能力的影响, 具有重要的理论和现实意义。以东北地区为例, 利用“3S”技术, 着 重应用GIS 空间分析优势, 首先分层次开展耕地自然质量评价、耕地利用质量评价与耕地综 合质量评价, 分析耕地自然质量、耕地利用质量与粮食单产的关系, 研究区域耕地数量变化 引起的耕地综合质量空间分布变化; 然后从耕地数量、耕地质量、作物种植制度等方面, 探 讨东北地区耕地变化对粮食生产能力的影响。为本地区耕地资源可持续利用与管理, 制定科学合理的粮食生产发展规划提供借鉴, 为其他地区开展类似研究提供参考。
石淑芹, 陈佑启, 姚艳敏, 李志斌, 何英彬 . 东北地区耕地变化对粮食生产能力的影响评价[J]. 地理学报, 2008 , 63(6) : 574 -586 . DOI: 10.11821/xb200806002
It is of great significance to research the changing patterns of current regional cultivated land and explore its impact on grain productivity. "3S" technology can not only improve precision, speed and efficiency of data collection, but also obtain and manage various kinds of agricultural resource information with spatial attributes effectively, and monitor and assess the cultivated land dynamic change. This research is innovative in such aspects as research content, method and so on. Firstly, taking Northeast China as a study area, with the help of "3S" technology and on the basis of spatial and temporal land resource data, agricultural statistics data and considering the natural and socio-economic factors, this paper analyzed the impact of cultivated land change on the grain production capacity within this region in terms of cultivated land quantity, cultivated land quality, crop structure etc. Secondly, since the soil nutrient data obtained from field survey in 2005 differ greatly from the data obtained at the time of the second soil survey in the 1980s on the aspect of sample position, quantity, time and soil analytical method, this paper did not carry out comparative research with the cultivated land quality of the period of the second soil survey, but analyzed the spatial distribution of the change of the cultivated land quality caused by the change of cultivated land quantity. Thirdly, considering cultivated land quality is the comprehensive reflection of different properties of cultivated land, the elements of cultivated land quality include the natural factors and social-economic factors mainly. And the natural resources, cultural structure and social-economic conditions among different regions may vary greatly, thus the natural and social-economic factors will exert different effects on grain production in different regions, and this proves that it is important to manage cultivated land resources based on regionalization. In recent years, the peasants have increased the input amount on the cultivated land, such as fertilizer and mulch film, which resulted in different effects on cultivated land quality in Northeast China. Under the above-mentioned background, this paper analyzed cultivated land quality information in the concerned region. The method was to explore natural quality grading and utilizing quality grading on cultivated land respectively through natural quality grading and utilizing quality grading indicator systems. And then we divided the whole region into high-yield cultivated land, medium-yield cultivated land and low-yield cultivated land based on per unit area grain yield, and the correlation was analyzed between natural quality grading of land and per unit area grain yield as well as between utilizing quality grading of land and grain yield per unit area through GIS method. In a word, this paper can provide some help to sustainable utilization and management of cultivated land resource in the study and offer useful reference for the similar research in other regions.
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