典型文献
A New Indicator for Global Food Security Assessment:Harvested Area Rather Than Cropland Area
文献摘要：
Cropland area has long been used as a key indicator of food security.However,grain yield is not solely controlled by the area of the cropland.Therefore,we proposed a new indicator to assess food security.Results show that from 1992 to 2004,the global crop-land area increased by 840 200 km2(99.4％),but the grain yield increased only by 310 million t(29.1％);and from 2004 to 2015,the cropland area decreased by 39 000 km2(4.64％),but the grain yield increased by 370 million t(70.84％).This result showed that grain yield was not linearly correlated with cropland area,and delimiting the threshold of cropland protection may not guarantee food security.Combined with further correlation analysis,we found that the increase in the global grain yield was more closely related to the harves-ted area(R2=0.94),which indicated that the harvested area is a more scientific and accurate indicator than cropland area in terms of guaranteeing food security.Therefore,if governments want to ensure the food security,they should choose a new and more accurate in-dicator:harvested area rather than cropland area.
文献关键词：
中图分类号：
作者姓名：
SONG Fengjiao;WANG Shijie;BAI Xiaoyong;WU Luhua;WANG Jinfeng;LI Chaojun;CHEN Huan;LUO Xuling;XI Huipeng;ZHANG Sirui;LUO Guofeng;YAN Mengqi;ZHEN Qingqing
作者机构：
State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry,Chinese Academy of Sciences,Guiyang 550081,China;University of Chinese Academy of Sciences,Beijing 100049,China;Puding Karst Ecosystem Observation and Research Station,Chinese Academy of Sciences,Puding 562100,China;CAS Center for Excellence in Quaternary Science and Global Change,Xi'an 710061,China;Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed,Guizhou Education Uni-versity,Guiyang 550018,China;The third Institute of Surveying and Mapping of Guizhou Provincial,Guiyang 550004,China;The first Institute of Surveying and Mapping of Guizhou Provincial,Guiyang 550025,China
文献出处：
引用格式：
[1]SONG Fengjiao;WANG Shijie;BAI Xiaoyong;WU Luhua;WANG Jinfeng;LI Chaojun;CHEN Huan;LUO Xuling;XI Huipeng;ZHANG Sirui;LUO Guofeng;YAN Mengqi;ZHEN Qingqing-.A New Indicator for Global Food Security Assessment:Harvested Area Rather Than Cropland Area)[J].中国地理科学（英文版）,2022(02):204-217
A类：
Harvested,harves,dicator
B类：
New,Indicator,Global,Food,Security,Assessment,Area,Rather,Than,Cropland,area,has,long,been,used,key,indicator,food,security,However,grain,yield,not,solely,controlled,by,cropland,Therefore,proposed,new,assess,Results,that,from,global,increased,km2,but,only,million,decreased,This,result,showed,was,linearly,correlated,delimiting,threshold,protection,may,Combined,further,correlation,analysis,found,more,closely,which,indicated,harvested,scientific,accurate,than,terms,guaranteeing,governments,want,ensure,they,should,choose,rather
AB值：
0.450999
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