涝渍对夏玉米生长发育及产量的影响试验

Experimental Study on Effects of Waterlogging on Growth and Yield for Summer Maize

通过测坑夏玉米不同生育期不同淹水天数的淹涝试验,探讨了夏玉米各生育阶段不同淹水历时对作物长势变化、产量形成因素和产量的影响。结果表明:夏玉米在苗期和拔节期淹水超过4 d,叶面积指数显著降低;百粒重和穗粒数在苗期淹水超过8 d、拔节期淹水超过4 d时均明显下降;在苗期淹水6 d以上、拔节期淹水4 d以上、抽雄期淹水6 d以上时,对经济产量均产生明显影响。

The paper imposed different flood submergence duration on summer maize grown in the pits at different growth stage to explore the effects for summer maize in the crop growth change, the crop yield formation factors and yield. The results show that when the flooding duration of summer maize at the seedling stage and jointing stage is over four days, there is a significant reduction in leaf area index（LAI） ; hundred kernel weight and grains per spike are significantly decreased in the seedling stage flooded duration over eight days and in the jointing stage flooded more than 4 days; it will produce a significant effect on economic output that flooded duration for more than six days of summer corn in the seedling stage, jointing stage of flooding duration for more than four days, tasseling stage of flooding duration for more than six days.