摘要
耕地产能核算是耕地分等的深化和延续,对于落实严格保护耕地的战略目标具有重要意义。基于耕地分等成果,该文采用耕地分等与农业统计结合的产能核算方法,对江苏省耕地产能进行了核算,分析了江苏省省域尺度下耕地产能的空间格局及其分异规律,并探讨了各因素指标区耕地产能的主导影响因子。结果表明:江苏省不同层次耕地产能总产分异规律基本一致,总产大小表现出苏北>苏中>苏南的格局,这主要受耕地面积分布格局的影响,因此,耕地面积是粮食安全的重要保证,合理开发耕地后备资源是未来挖掘耕地产能的一个重要途径;从耕地单产分异规律来看,理论单产与可实现单产的空间分异规律基本一致,表现出南北高,中间低的分布格局,耕地实际单产的分布格局较为复杂,呈现出岛状分布的特点,高值岛出现在里下河平原区;有机质、农业灌排条件和利用系数是影响省域尺度耕地单产的主导因子。通过分析,全面掌握了江苏省耕地产能的空间分异状况,为区域性土地资源宏观调控与调整提供依据;同时,各指标区尺度的主导因子有所差异,今后可根据不同指标区的主导影响因子,采取针对措施,以有效提高各指标区的耕地产能。
Account of agricultural production capacity is the deepening and extension of cultivated land classification and gradation,which is very important for the implementation of the strategic objectives of cultivated land protection. On the basis of cultivated land classification and gradation results,through investigating supplementary sampling points, this paper carries out the accounting of agricultural production capacity in Jiangsu Province,and analyzes its spatial pattern and variation under the province-scale,and explores its impact factors.The results showed that the spatial variation law of agricultural production capacity at different levels could be basically same.The size of production capacity showed the features of northern partmiddle partsouthern part in Jiangsu Province,which was mainly affected by the distribution pattern of arable land area,therefore,cultivated land area was an important guarantee of food security,and the rational development of cultivated land reserve resources was an important way to increase cultivated land production capacity in the future.From the distribution law of cultivated land yield per unit,it showed that the spatial distribution of the theoretical yield per unit could be the same as the realizable yield per unit.It was larger in the northern and southern part than in middle part.The spatial distribution of the actual yield per unit was more complicated, which was showing a distribution of the characteristics of island,and island of the most high-value areas was in the Lixiahe Plain District;organic matter,agricultural irrigation and drainage conditions and the utilization factor were province-scale leading factors affecting the yield of cultivated land.The difference of the impact factors of cultivated land production capacity in all districts was obvious.By taking correct measures,the status of the production capacity can be completely control of Jiangsu Province,and the basis for macro-controlling and adjusting the regional land resources can be provide.Meanwhile,according to different indicators of the dominant impact factors in different districts,cultivated land production capacity can be increased in the future.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2010年第8期308-314,共7页
Transactions of the Chinese Society of Agricultural Engineering
基金
江苏省农用地质量动态监测研究
江苏省农用地产能核算
关键词
土地利用
空间变异控制
区域规划
耕地产能
影响因子
江苏省
land use
spatial variables control
regional planning
cultivated land production capacity
impact factors
Jiangsu Province
