水氮耦合对北疆滴灌春小麦前期生长及产量的影响

Effects of Water-nitrogen Coupling on Early Growth and Yield of Spring Wheat under Drip Irrigation in North Xinjiang

为探究不同灌水施氮量对北疆大田滴灌春小麦前期生理指标、产量的影响及前期生理指标和产量的关系,选用新春6号,设置4个滴水处理(4 050、4 500、4 950和5 400m3/hm2,分别标记为W1、W2、W3、W4)和5个施氮水平(375、600、825、975和1 050kg/hm2,用N1、N2、N3、N4、N5),对小麦拔节期、孕穗期和扬花期相应指标进行分析。结果表明,随滴水或施氮量的增加,干物质、叶面积和产量表现出先增后减趋势;水、氮用量对春小麦前期生长指标的影响与产量影响规律相似;处理W2N4、W1N4水氮耦合较好,其中处理W2N4产量为各处理最大7 786.74kg/hm2。

In order to explore the effects of water-nitrogen coupling on early growth index and yield of spring wheat under drip irrigation in North Xinjiang,a field plot experiment with 4water treatments（W1：4 050、W2：4 500、W3：4 950、W4：5 400m3/hm2）and5nitrogen treatments（N1：375、N2：600、N3：825、N4：975、N5：1 050kg/hm2）with cultivar spring wheat Xinchun 6was carried out.The results showed that under the same water treatment matter,dry matter accumulation,leaf area and yield first increased and then decreased with the increase of nitrogen,while dry matter accumulation,leaf area and yield first increased and then decreased with the increase of water under the same nitrogen treatment.The effects of water-nitrogen coupling on early growth index was similar with that on wheat yield.Further,indexes under W2N4 and W1N4 treatment had greater value,and the maximum yield was7 786.74kg/hm2 under W2N4 treatment.