【摘要】 为定量探求洪涝灾害对玉米生长及产量的影响,于2008和2009年在河南省驻马店地区进行以淹水日数和淹水发育期为试验因素的模拟试验。结过表明:淹水1 d对玉米产量影响甚微,淹水3 d以上减产率40%以上,拔节期淹水5～7 d,抽雄期淹水7 d夏玉米基本绝收。淹水对夏玉米植株死亡率、果穗成穗率、单株籽粒重影响明显;对株高、果穗长、粗、百粒重和秃尖率影响较小。拔节期的淹水危害重于抽雄期。讨论了淹水日数与淹水发育期对玉米产量影响的交互作用。初步建立了淹水的玉米产量损失率评估模型。更多还原

【Abstract】 To quantitatively explore the effect of flooding on the growth and yield of corn,a simulation test was carried out in Zhumadian areas,Henan Province in 2008 and 2009,which accounted for a number of factors,especially the waterlogging time and the development stage.The results of the test suggest that: 1 d flooding has little effect on corn production,while more than 3 d flooding leads to over 40% reduction.During the jointing stage,5-7 d flooding results in a total failure for summer corn.This is also the case for 7 d flooding during the heading stage.Flooding has significant effect on mortality,spike rate,and grain weight per plant for summer corn,while the plant height,ear length,diameter,weight and bald rate are less affected.Flooding in the jointing stage results in more damage than in the heading stage.In this paper,we discuss the interaction between the waterlogging time and the development stage.A preliminary loss assessment model for flooded corn has been established.更多还原