南疆灌淤土区冬小麦水肥耦合效应研究

根据水肥耦合效应确定水肥管理方案是解决小麦生产中水肥管理联系不紧密、水肥利用效率不高的重要方法。采用正交旋转组合设计在南疆小麦主产区进行水肥耦合效应研究。结果表明:灌淤土上小麦水肥交互效应明显,灌水、氮肥、钾肥对小麦产量的影响均是正效应,磷肥对小麦产量的影响是负效应,但是灌水与氮肥和磷肥的交互作用是协同效应,与钾肥的交互作用是拮抗效应。根据水肥交互效应确定了不同条件下灌溉量、氮肥、磷肥、钾肥用量的阈值,并提出了冬小麦产量最高的水肥管理方案。

Effects of Water- fertilizer Coupling of Winter Wheat in Irrigating Warped Soil Region of South Xinjiang

It is an important method to make up management scheme of irrigating and fertilzation based on water-fertilizer coupling effects.The paper studied effects of water-fertilizer coupling of winter wheat in irrigating warped soil region of south Xinjiang.Results showed that the effects of water-fertilizer coupling were very significant in irrigating warped soil,effects of irrigation water amount,nitrogen and potassium on the wheat yield was positive,and phosphate was negtive,the interaction between irrigation water amount and nitrogen,between water and phosphorous was synergism,but interaction between water and potassium was antagonistic.Based on water fertilizer coupling effects,the regional value for management of irrigation water amount,nitrogen,phosphate and potanssiumin amound were determined.At the same time,the optimum irrigation and fertilization management cheme for the winter wheat were suggested.