在石羊河流域开展微咸水灌溉试验,综合考虑水分与盐分因素对春玉米生长的影响,以国际上通用的水分生产函数Blank模型和Jensen模型为基础进行作物水盐模型的构建,通过引入盐分胁迫因子,将水分生产函数转变为水盐生产函数.通过2009年和2010年春玉米不同矿化度微咸水灌溉试验,结合函数求解,探求春玉米各生育阶段的盐分敏感指数,得出春玉米的盐分敏感程度顺序为苗期＞拔节期＞抽雄灌浆期＞成熟期.同时以交替灌溉试验进行验证,结果表明微咸永安排在盐分敏感程度小的生育阶段更有利于作物的生长.%Plot experiments were carried out under irrigation with water of different salinity in the Shiyang River Basin to study the effect of water and salt factors on the growth of spring corn. Based on Blank model and Jensen model which were generally used in the world, crop water-salt model was built. And then salinity stress factor was used to transform water production function into water-salt production function. Through tests of irrigation with water of different salinity in 2009 and 2010 and function solutions, the salt sensitive index in different growth stage of spring com was sought. The results showed that the salt sensitive degree sequence was seedling stage > jointing stage > tasseling-grouting stage > maturity stage. The result was verified by alternative saline water irrigation, and it showed that the crop would grow better if the irrigation happened in the growth stage with little salt sensitive degree.
展开▼
