Comparison of the Capacities of Waterlogging and Drought Tolerances among Winter Cereals

Japanese Journal of Crop Science

Akira YAMAUCHI¹  Yasuhiro KONO¹  Noritaka INAGAKI¹  Jiro TATSUMI¹ 

关键词: Drought tolerance;    乾物生産;    Dry matter production;    根系;    Root system;    蒸散係数;    Transpiration coefficient;    耐早性;    Waterlogging tolerance;    耐湿性;    Winter cereal;    冬作イネ科作物;   

DOI  :  10.1626/jcs.57.163

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Winter cereals (hulled barley, naked barley, wheat, rye and oat) were grown under waterlogged (W) and drought (D) conditions from seven weeks after sowing up to maturity. Their growth, dry matter production and transpiration coefficients were compared with those grown under moderate soil moisture (M) conditions in order to quantitatively evaluate their waterlogging and drought tolerances. Plant growth was relatively depressed under both W- and D-conditions as compared with that under M-conditions. Naked barley, wheat, rye and oat produced more dry matter of a whole plant under D-conditions than W-conditions, while hulled barley produced more dry matter under W-conditions than D-conditions. We evaluated that the former crops had relatively large drought tolerance capacities (RLDTC) and the latter crops had relatively large waterlogging tolerance capacities (RLWTC). We considered that a crop is stable to W- or D-conditions when the ratio of its transpiration coefficient under W- and D-conditions to that under M-conditions is close to or below 1.0, and is susceptible when the ratio is above 1.0. Among the crops with RLDTC, rye and oat were very susceptible, and naked barley and wheat were relatively susceptible, while hulled barley, which had RLWTC, were stable to W-conditions. All of the crops were stable to D-conditions. The waterlogging and drought tolerances of these cereals were discussed in relation to the growth and function of their root systems under W- and D-conditions.

【 授权许可】

Unknown