限制灌水对玉米品种叶片、根系等的影响

Effect of Limited Irrigation to Leaves and Roots of Maize

利用盆栽通过设置限制灌水和充足灌水对23个玉米品种进行限制灌水处理,主要对玉米品种叶片、株高、根冠比等方面的影响方面作了部分探讨。结果表明:干旱会易导致植株生长不良,植株矮小。自身株高越矮的品种,受干旱影响的程度越小。限制性灌水一般会导致玉米单株叶面积急剧下降。抽雄吐丝期和成熟期的根冠比变化强度小于叶面积的变化。多数情况下限制灌水有助于根冠比的加大,但根冠比大的品种不一定就是抗旱的品种。成熟期限制灌水处理较抽雄吐丝期限制灌水根冠比减低幅度可能对鉴定品种抗旱性有较大意义。

Drought led to Small plants,but there were one or two exceptions.And leaf area decreased,But contributed to increase ratio of leaf and root.But large ratio of leaf and root didn t predicate good for drought resistance of maize.Small plant contributed to drought resistance.The decrease of ratio of leaf and root of limited irrigation of mature stage and flowering stage was greater significance of identification of drought resistance.