黑龙江半干旱区玉米膜下滴灌水肥耦合效应试验研究

Coupling Effects of Water and Fertilizer on Drip Irrigation of Corns under Plastic Mulches in Semi-arid Areas in Heilongjiang Province

以玉米为研究对象,在黑龙江省大庆市杜蒙县进行了玉米膜下滴灌水肥耦合效应试验研究,目的在于寻求膜下滴灌最优水肥配施方案。本实验采用二因素二次饱和D-最优设计(206),建立了水氮回归数学模型。结果表明:该地区灌水量、施氮量对玉米产量的影响都为正效应,玉米产量的主要影响因素是氮肥用量。从产量角度评价,以高氮和中水为水肥调控的最佳组合,水肥调控的最佳组合获得最高产量为12 333.33 kg/hm2。所需施氮量为375 kg/hm2,全生育期补充灌溉量为538.7 m3/hm2。

In this paper,corn is the object of our research.The experiments on coupling effects of water and fertilizer are carried out under the condition of film mulches and drip irrigation in Dumeng County of Heilongjiang Province.The aim is to seek the best plan for irrigation and fertilization By.using two factors,two saturations D-Optimum Design（206）,the regressive mathematical model is set up.Analyses show that the factors of irrigation and fertilization are the positive effects on the corn yield.It also shows that the dosage of N fertilizer has influenced the yield of corn.significantly.From the viewpoint of corn output,higher level of N and the moderate water is the best combination.The best combination of water and fertilizer regulation of the highest yield is 12 333.33 kg/hm2.The optimum combination of N is 369.45 kg/hm2 with moderate irrigation limit of 538.7 m3/hm2 under the condition of this experiment.