膜上灌玉米节水灌溉参数与氮磷比最优配比的研究

Study on water-saving irrigation practices parameter and the optimal proportion of nitrogen and phosphorus of corn irrigation on film

为了确定影响膜上灌玉米生长发育的主要因素,采用正交试验研究单种玉米小畦膜上灌条件下,不同灌水定额、灌水次数和氮磷配比对玉米生长发育和产量的影响.根据极差法对试验数据分析得出——灌水次数为4次,灌水定额为600m 3/hm 2,N/P为2.5时产量最高;分别以玉米株高和叶面积指数为指标进行极差分析,得出——灌水定额是主要影响因素,灌水次数和氮磷比是次要影响因素,方差分析不显著.

Take orthogonal experiment to study the yields and growth of corn under the condition of different irrigation frequency, different irrigation water quota, different N/P and irrigation on film. Through range and covariance analysis, the result showed that the irrigation on film corn method reached higher yields when the irrigation frequency was 4, the irrigation water quota was 600 m^3/hm^2 and N/P was 2.5. The results of stem height and LAI of corn were analysed. A conclusion has been made that the irrigation water quota is the most influential factor among the above three factors, but the results of covariance analysis is not clear.