Change of Drought and Its Impact on Grain Production in China
L Yan-bin
WANG Yu-bin
Abstract：Through the study on the data of drought from 1950 to 2011 in China,this paper analyzed the law of drought changes.The results showed that the areas affected by drought accounted for about 52·53% of the total areas affected by natural disasters,which became the most severe natural disaster;the areas covered and areas affected by drought were highly correlated;the average cycle of drought was 14·25 years,and it presented a narrowing trend;the space of drought had been shifting,Northeast and North China being the most serious region, while Central and South China being the lightest.Finally,the regression equation of grain output and drought disaster areas were obtained by the statistical software.The proposals were put forward:giving priority to drought resistance as well as taking all factors into consideration, promoting the use of high-yielding and drought-resistant varieties,and increasing the research in water-saving irrigation measures.
Keywords：areas covered by droughtareas affected by droughtcorrelation coefficientgrain yield
Publication Date：2014-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：4( 19-22 )