辽宁灯塔市玉米生育期旱涝评价

Drought and Flood Evaluation in the Growth Period of Maize in Dengta City of Liaoning

采用美国环境评价中心(NOAA/CEAS)产量水分指数、百分位方法,作为玉米生育期旱涝评价模型。统计分析了辽宁灯塔市玉米生育各阶段旱涝程度。分析结果表明,全生育期与各个生育阶段之间水分年际变化情况并不一致,全生育期的水分状况不能说明水分对玉米生长的影响,不同生育阶段的水分状况才是制约玉米生长和产量形成的重要因子。

The yield-water index and percentile method from U. S. Environmental Assessment Center （NOAA/CEAS） were used as the drought and flood evaluation model in the growth period of maize. The drought and flood degree in various growth stages of maize in Dengta City of Liaoning were analyzed. The analysis results showed that the annual change situations of water were not consistent between the whole growth period and each growth stage. The water situations in the whole growth period could not explain the effects of water on the growth of maize. While, the water situations in different growth stages were the important factors for restricting the growth and yield of maize.