中文摘要：

为了分析不同生育期微咸水灌溉对玉米生长的影响，在玉米4个生育期（苗期、拔节期、抽穗期和灌浆期）进行不同矿化度微咸水灌溉（1．75、3、4、5g／L）试验。试验结果表明：玉米株高随着播种后天数增大而增大，随时间的变化符合Logistic生长函数，在同一生育期，灌溉水矿化度越高，株高越低；玉米叶面积随着播种后天数呈先增大而后减小的变化规律，且符合负指数函数，在同一生育期，灌溉水矿化度越高，玉米叶面积最大值越小；玉米同一生育期的灌溉水矿化度越高，干物质量和产量越低，各生育期微咸水灌溉水矿化度与玉米产量符合线性关系。各生育期微咸水灌溉对玉米产量影响的顺序为：拔节期〉苗期〉抽穗期〉灌浆期；苗期和拔节期适宜采用的灌溉水矿化度较低。抽穗期和灌浆期适宜的灌溉水矿化度较高。

英文摘要：

In order to study the effects of brackish water irrigation on the growth of maize, the experiment of brackish water irrigation with different salinity （1.75, 3, 4, 5 g/L） in four maize growth periods （seedling period, jointing period, heading period and filling period） is conducted. The experimental results show that the plant height of maize increases with time, and the variation function between plant height and time accords with Logistic function. In the same growth period, the higher the salinity of irrigation water, the lower the plant height; with the increase of the days after sowing, the leaf area of maize increases first and decrease later. Negative exponential function can be used to describe the ration between leaf area and time. In the same growth period, the higher the salinity of irrigation water, the smaller the maximum leaf area of maize; also, the higher the salinity, the lower the dry weight and yield. In each growth period, the relation between the salinity of brackish water and maize yield is linear. And the order from large to small of the influence of the brackish water irrigation on maize yield in different growth periods is as follows： jointing period, seedling period, heading period, filling period; in seedling period and jointing period, irrigation water with low salinity is suitable, but in heading period and filling period, irrigation water with high salinity is needed.