玉米苗期干旱拔节期复水补偿效应试验研究

采用盆栽试验方法，研究了玉米苗期在不同干旱程度下生长, 并在拔节期复水，分析复水后株高的动态变化及对干物质、根冠比的影响。结果表明：苗期亏水抑制了株高、叶面积和干物质积累的增长, 轻度干旱和适氮条件下复水后补偿效应明显，出现超补偿效应； 重度干旱条件下复水后虽然有所恢复,但很难恢复到正常水平；在轻度干旱和中度干旱下适当的增加施氮量可以提高干旱复水的补偿效果。

Study on compensation effect of rewatering during jointing stage after soil drought at seedling stage

There was a study on the maize grown at the seeding stage under different levels of soil drought and re-watering during the jointing stage through the pot experiment.Analyzing the dynamic changes of plant height and the effect of root shoot ratio and dry matter after re-watering. The results shows that: Deficit irrigation at seeding stage could restrained the growth of plant height、leaf area and dry matter accumulation, it was apparent compensation effect after re-watering under mild drought and appropriate nitrogen fertilizer,while the Over-compensation effect will appear; Although severe drought conditions after re-watering could get some recovery, but it was difficult to return the normal levels;Increasing the nitrogen fertilizer appropriately can improve the compensation effect of re-watering under moderate and mild drought.