摘要
概述了东北玉米生长发育对低温环境的反应,分析了玉米冷害致灾的因素、机理及指标。用变异系数、概率分布函数等方法分析了玉米冷害风险的地域分布,对玉米冷害经济损失风险进行了讨论。结果表明,东北北部、东部冷害风险较大,中、西、南部较小,严重冷害年东北区玉米损失达600多万t,折合人民币60多亿元。
Response of corn growing to low temperature was summarized and cold damage-causing factors, mecha-
nism and the damage indices were analyzed. The geographical distribution of the cold damage risk were analyzed by
using variance coefficient and probability distribution function. Economic loss of corn by cold damage were analyzed
too. The result indicates that the risk of cold damage in north and east areas of Northeast China is larger than that
of its west, middle and south area and in serious cold damage years, grain loss has been about 6. 0×10~9kg corre-
sponding to over 6. 0×10~9 yuan RMB.
出处
《自然灾害学报》
CSCD
北大核心
2003年第3期137-141,共5页
Journal of Natural Disasters
基金
国家"十五"科技攻关项目(2001 BA509B14)
关键词
东北地区
玉米
低温冷害
风险评估
corn
cold damage
risk evaluation
Northeast China
