黔东南州气象灾害对水稻损失量的评估

Assessment of Rice Yield Loss Affected by Meteorological Disasters in Qiandongnan of Guizhou

以无气象灾害时水稻生产应当达到的理想产量为基础 ,根据影响水稻产量形成的因素 ,利用一种评估气象灾害造成粮食损失量的方法 ,对黔东南州 80年代以来气象灾害造成的水稻损失量进行了评估。结果 :影响黔东南州水稻生长的气象灾害主要是干旱和洪涝 ,干旱造成的损失量大于洪涝 ;在 1981～ 1997年间 ,因气象灾害造成的水稻损失量年平均为 8.1万 t,损失率年平均为12 .1%

Based on the ideal rice yield without meteorological disasters and in the light of factors affecting the rice yield, the rice yield loss affected by meteorological disasters has been assessed by using the method of estimating the grain loss affected by meteorological disasters in Qiandongnan prefecture of Guizhou province since 1980s. The results show that the meteorological disasters of affecting the rice production are drought and flood, the yield loss affected by drought is higher than that by flood, the annual average loss affected by meteorological disasters is about 0.081 million ton and the annual average loss rate is up to 12.1%.