岩溶山区石漠化与耕地压力和粮食安全问题的耦合分析  

Coupling Analysis on Cultivated Land Pressure,Food Security and the Rocky Desertification of the Karst Mountain Areas

作　　者：贺祥[1] 熊康宁[2] 

机构地区：[1]凯里学院旅游学院,贵州凯里556011 [2]贵州师范大学中国南方喀斯特研究院,贵州贵阳550001

出　　处：《贵州农业科学》2014年第2期177-181,共5页Guizhou Agricultural Sciences

基　　金：国家"十二五"科技支撑计划重大课题"喀斯特高原峡谷石漠化综合治理技术与示范"(2011BAC09B01);贵州省教育厅自然科学基金青年项目"喀斯特石漠化治理土壤环境效应研究"(黔教科20090083);凯里学院规划项目"旅游活动对民族村寨景区影响的效应研究"(S1116)

摘　　要：为了探明岩溶山区土地石漠化与耕地压力、粮食产量及粮食安全问题之间的关系,采用构建耕地石漠化压力指数(IRDPC),引用耕地压力指数(ICP)、粮食平衡系数(ECF)、耕地标准系数(SCC)等指标与模型,对2005年贵州省各地市的石漠化、耕地压力与粮食安全等问题进行分析。结果表明:1)遵义市和黔东南州的耕地石漠化压力指数低于1,其余各地市的耕地石漠化压力指数很高、石漠化严重;2)除遵义市外,其余各地市耕地压力指数均>1,人均耕地面积严重不足,耕地压力大;3)全省耕地标准系数在0.5左右,其耕地质量整体较差;4)除遵义市外,其余各地市粮食平衡系数<1,粮食产量存在较大缺口,粮食安全问题突出;5)耕地石漠化压力指数与粮食播种地人口密度、耕地压力指数、农村贫困率等指标呈正相关性,与耕地生产力、耕地标准系数、粮食平衡系数等指标呈负相关性。结论:贵州岩溶山区石漠化环境问题的治理是能否改善土地质量、提高耕地粮食产量、降低耕地压力、解决粮食安全等问题的关键因素。For understanding the relations among the rocky desertification,the pressure of cultivated land,the yield of food and the question of food security,IRDPC,ICP,ECF and SCC were used to analyze rocky desertification,pressure of cultivated land and food security in various cities in Guizhou in 2005. Results：1）the IRDPC is lower than 1 of Zunyi City and southeast Guizhou.The IRDPC are more than 1 in other cities in Guizhou.So its rocky desertification is very serious.2）excepting for Zunyi City,the ICP are more than 1 of other cities of Guizhou.So its per cultivated land area are seriously insufficient and the cultivate pressure are high.3）the SCC is at 0.5 or so of all city of Guizhou.So its cultivated quality is poor.4）excepting for Zunyi City,the ECF are lower than 1 of other cities of Guizhou.So there are short-commons and food safety problem of Guizhou.5）IRDPC have positive correlations with population density of food sow seed areas,ICP and incidence of poverty,And negative correlations with cultivated land productivity,SCC and ECF.Therefore,management of the karst rocky desertification of Guizhou are the critical factors to improve the land quality,raise food output of cultivated land and solve the food security questions.

关 键 词：耕地石漠化 耕地压力 粮食安全 耦合分析 贵州 

分 类 号：S666.1[农业科学—果树学]