Studies on Waterlogging of Corn and Protectiion Meossures-I.Effects of Waterlogging at Bud Bursting Stoge on the Emergenee and Early Csrowth of Seedlings of Cron

doi:10.3321/j.issn:1000-7091.1988.02.003

Abstract

Abstract: A simulation study was carried out in pot planting conditions to determine the effects of waterlogging at the seedling stage on summer corn,growth.The results indicated that the most sensitive period of corn to waterlogging occurred from the inhibition (seed swellind),stage to the enlongation stage of radicles(2-3)days afterafter planting).During this period,the germination rate decreased by more than 50% after 2 days of flooding.The resistance of corn to waterlogging increased grasually after emergence,but the retarding effect on seedling growth still remained significant.It mainly resulted in decreases of the length,volume aid weight of roots,and the deal'area and dry weight per plant,and in increases of the number of witherod and yellow leaves.Flooding also promote the early growth of secondary roots and enlarged the air space inside roots.The adverse effects of waterlogging on corn became greaxer and greater z.s the depth and duration of flooding increased.Flooded seedlings died 2 days after the whole plant was kept under water.Seedlings with leaves above water survived even after 3 days of flooding.It was found that high temperature during flooding could result in a more serious damage.

Key words: Maize, Waterlogging at bud bersting stage, Root air space

Chen Guoping, Zhao Shixiao, Yang Hongyou, He Chengri. Studies on Waterlogging of Corn and Protectiion Meossures-I.Effects of Waterlogging at Bud Bursting Stoge on the Emergenee and Early Csrowth of Seedlings of Cron[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1988, 3(2): 12-17. doi: 10.3321/j.issn:1000-7091.1988.02.003.

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