VARIATIONS

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Variations of Frost-free Period and Its Impact on Grain Yields in Henan Province during 1961-2013被引量：4
《Agricultural Science & Technology》2015年第8期1588-1591,1692,共5页闫军辉 傅辉 周红升 徐新创 
Funded by"Strategic Priority Research Program"of the Chinese Academy of Sciences(XDA05090101,XDA05090104);China Global Change Research Program(2010CB950101,2012CB955403);Basic Research Project of the Ministry of Science and Technology(2011FY120300);Doctor Foundation of Xinyang Normal University(0201403);National Natural Science Foundation of China(41271124,41101549)~~
The aim of this study was to investigate the responses of frost dates to global warming and its influences on grain yields. In this study, based on the frost date series defined by daily minimum ground temperature, th...
关键词：Daily minimum ground temperature Frost-free period Grain yield Henan province 1961-2013 
Grain Production Driven by Variations in Farmland Use in China:An Analysis of Security Patterns被引量：6
《Journal of Resources and Ecology》2010年第1期60-67,共8页龙花楼 邹健 
the Ministry of Science and Technology of China(Grant NO.2007BAC03A 11-01);the Knowledge Innovation Program of the Chinese Academy of Sciences(Grant NO.KZCX2-YW-QN304);the National Natural Science Foundation of China(Grant NOS.40771014 and 40635029)
自从1978年改革开放以来,随着经济的迅速发展,中国的耕地利用格局发生了很大的变化。耕地数量和质量的变化直接导致粮食生产的变动。本文利用来自政府部门的农业统计数据,分析了1978-2004年间中国耕地利用水平的时空动态格局,并通过构建...
关键词：farmland quality land use farmland-grain elasticity coefficient grain production security pattern 
Variations of population structure and important value of the main edificators along the elevation gradient on the northern slope of Changbai Mountain被引量：1
《Journal of Forestry Research》2003年第2期117-121,共5页姜萍 叶吉 郝占庆 邓红兵 
This research was supported by Chinese Academy of Sciences '100 people'project; National Natural Science Foundation of China (39970123); and Changbai Mountain Open Research Station.
From 700 m to 1900 m on the northern slope of Changbai Mountain, 13 plots with an interval of 100 m in elevation were investigated to study the variations of population structure and important value of the main edific...
关键词：Edificator POPULATION Important value STRUCTURE Elevation gradient Changbai Mountain 
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