摘要
以粮食产量计算模型为基础,将粮食生产分解成耕地利用的数量、结构、强度、广度4个因子。以江苏省为例,从省域—分区域—地市等不同空间尺度,分析粮食生产的耕地因子过程,比较各地粮食生产变化的差异及其耕地利用变化的成因。结果显示:1990年代中期以来,江苏粮食生产区域分化显著,南部耕地大幅减少、有限耕地的生产功能减退,导致粮食生产全面萎缩;中北部耕地利用集约度提升,粮食生产功能总体趋于强化。影响各地市粮食生产变化的主导因子各有不同:粮食单产是连云港、盐城、宿迁、扬州、泰州5市粮食增产的主导因子,结构调整是南京、徐州、南通粮食减产、淮安粮食增产的主导因素;复种指数调减是苏州、无锡粮食生产衰退的首要因子。
Based on the total grain yield computation model,grain production could be decomposed by 4 factors of cultivated land use,including the scale and the scope of utilization,the use structure and intensity change in cultivated land use.As a case study,the dynamics of Jiangsu＇s grain production are identified at provincialregional-city level respectively.The results show that： Since mid-1990s,the grain production of South Jiangsu shrinks due to decrease in sum and decay in yield function of cultivated land,whereas Central and North Jiangsu become granary because of increase in intensity of cultivated land use.The dominant contributing factor to the grain production differs in different cities： the intensive cultivation is the most remarkable factor in 5 cities in Central and North Jiangsu such as Lianyungang,the structure adjustment has the greatest impact on the change of grain production in Nanjing,Xuzhou,Nantong and Huaian,Suzhou and Wuxi mainly due to multiple-crop index.
出处
《经济地理》
CSSCI
北大核心
2011年第11期1886-1890,共5页
Economic Geography
基金
江苏高校优势学科建设工程资助项目(PAPD)
扬州大学博士后科学基金项目联合资助
关键词
粮食生产
区域分化
耕地变化
因素分解
grain production
regional disparity
change of cultivated land use
factor decomposition
