不同灌水时期对旱地成龄扁桃抗旱性和生长发育的影响

EFFECT OF DIFFERENT IRRIGATION PERIOD ON DROUGHT RESISTANCE AND GROWTH OF ADLUT ALMOND UNDER DROUGHT CONDITION

在干旱条件下,以成龄扁桃为试材,进行了一定量水(100mm±),在不同时期(5月底、7月中旬和9月初)灌溉对提高其抗旱性和生长发育影响的研究。结果表明,早期灌水处理,生长季中叶片水势低,树冠温度高,水势日变化大,果实性状表现差,单位果枝上花量少,座果率低,尚不及全年不灌者;中期灌溉处理上述各指标优于不灌和早期灌水处理;以中、晚期各灌一次(总水量150mm±)处理表现最好,对树体抗旱性的提高和生长发育有利。

Effect of different irrigationperiod(late May,mid July and early Sep.)on drought resist ance and growth of adlut almond was studied under drought condition during 1991-1992. The result showed that: in the early irrigation treatment the leaf water potential.The member of flower buds on 50cm fruit shoot and the rate of set nuts were lower, canopy temperature and the daily change of leaf water potential were higher and the characters of nuts were worse. All these indexes were not desirable as those of no irrigation treatmant in whole year. The middle irrigation treatment was better than no irrigation and early irrigation treatment in every aspect.The middle and late irrigation treatment was the best, for increasing drought resistance and growth of almond trees.