Difference of Excised-leaf Water Loss Rate of Different Winter Wheat Cultivars and Response to Water Supply

doi:10.7668/hbnxb.2009.06.030

Abstract

Abstract: It is accepted that low excisedleaf water loss rate (RWL) is related to drought resistence.Responses and characteristics of RWL to water regimes of 8 winterwheat cultivars at different growth stages were studied under conditions of drought (no irrigation),watersaving (irrigations) and well water (4 irrigations).The results showed that there was no remakable difference in RWL among cultivars.RWL of Heng7228 showed best under drought,also Ji5579 and Shimai16.The lowest RWL was Shimai16 for irrigation treatment followed by Ji5579 and Shimai14.Under 4 irrigation,RWL of Shixin618 was lowest,and Shimai14 and Heng7228 was followed.Thus,Shimai 16,Ji5579 and Shimai14 performed good water saving by lower RWL under irrigation condition.RWL was lower at jointing stage of winter wheat,reached highest at heading stage,and then fell sharply until maturity.It was profitable to bring down RWL of wheat by early water stress to raise traits of drought resistance and water saving of winter wheat

Key words: Winter wheat, Cultivars, Excised -leaf water loss rate, Irrigation, Development stages

CLC Number:

S12.01

ZHAO Hong-liang, MA Rui-kun, JIA Xiu-ling, HOU Li-bai, LIU En-cai. Difference of Excised-leaf Water Loss Rate of Different Winter Wheat Cultivars and Response to Water Supply[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2009, 24(6): 153-157. doi: 10.7668/hbnxb.2009.06.030.

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