相对蒸散在冬小麦干旱宏观评估中的应用

APPLICATION OF RELATIVE EVAPOTRANSPIRATION IN MACROSCALE ASSESSMENTS OF WINTER WHEAT DROUGHT

中文关键词:  相对蒸散  冬小麦  干旱评估

英文关键词:Relative evapotranspiration  Winter wheat  Drought assessments

中文摘要:

      利用最新的Penman-Monteith参考蒸散估算方法,计算了华北各地历年小麦各发育阶段的相对蒸散。根据水分亏缺引起的不同减产程度,确定冬小麦各发育阶段干旱指标,并据此分析了小麦干旱程度及发生概率。建立了冬小麦干旱影响综合评估模式。结果表明,干旱指标农业意义明确,分析评估符合实际。利用综合考虑冬季严寒和生育期内各阶段水分状况的模式进行农业干旱影响评估的尝试取得了较好的效果。

英文摘要:

      Based on the updated operational estimates of reference evapotranspiration by Penman-Monteith the relative evapotranspiration in various development stages of winter wheatin North China were calculated.The results sho w thatthe proposed dro ughtindexes have agricultural meaning,the analysis and assessments well fit to facts.The agricultural drought impact assessmentusing integrated model in consideration of winter cold status and water condition in various stages of winter wheat got good results.