Abstract: [Objective]A field experiment,which was conducted to evaluate the effects of interaction of water management and nitrogen fertilizer on yield and water use efficiency of hybrid cotton No. 2 Shiza during flowering-bolling stage in National Agricultural Science and Technology Area in Shihhotze in 2008,[Method]included seven water treatments (moderate drought 55; FC,55; field capacity of 0-60 cm profile under drip irrigation before irrigation),mid-drought (65; FC),contrast (75; FC),low irrigation quantity and high frequency (LH) (3 d 18 mm,irrigation with 18 mm every 3 days),high irrigation quantity and high frequency (HH) (3 d 30 mm),low irrigation quantity and low frequency (LL) (5 d 18 mm),high irrigation quantity and low frequency (HL) (5 d 30 mm)) and four nitrogen treatments (0,(fertilizing nitrogen with 0 kg/hm~2 ),150,300 and 450 kg/hm~2). [Result]The results showed that cotton yield decreased significantly under mid-water stress and moderate water stress during flowering-bolling stage under the condition of N0 N treatment and increased insignificantly with LL irrigation in each levels of N-application. The cotton yield with N450 kg/hm~2 N-application was the highest under 75;FC irrigation condition,and cotton yield under the irrigation with 3 d 18 mm and 5 d 30 mm.When N application,the highest yield of 300 kg/hm~2 was given,the seed cotton yield reached the highest level.With nitrogen increasing,the cotton yield decreased significantly in LH water treatment. Therefore,when treated with 5 d 30mm-N 300,the seed cotton had the highest yield,which was 7 426 kg/hm~2,the treatment of 3 d 18 mm-N300 with seed cotton yield 7 018 kg/hm~2 was the second selection of nitrogen and irrigation strategy. From the perspective of yield components of cotton,boll numbers per hectare,boll weight and lint were decreased significantly when drought or excessive water were used during flowering-bolling stage.[Conclusion]5 d 30 mm-N300 and 3 d 18 mm-N300 were the optimization irrigation strategy and nitrogen for hybrid cotton in Northern Xinjiang.

摘要： [目的]2008年在石河子国家农业科技园区,以早熟杂交棉花品系石杂2号为材料,在花铃期进行水氮互作对杂交棉花产量及其构成因素影响的大田试验.[方法]试验设置了7个水分处理,中度干旱(55;FC,灌前滴灌带正下方0～60 cm土层达到55;的田间持水量,下同),轻度干旱(65;FC),对照(75;FC);高频小灌量(3 d 18 mm,每3 d灌水一次,灌水量18 mm,下同),高频大灌量(3 d 30 mm),低频小灌量(5 d 18 mm),低频大灌量(5 d 30 mm);4个氮素处理(随水追施纯氮0 ,150,300,450 kg/hm~2).[结果]在不施氮(N0)情况下,棉花花铃期轻旱和中旱显著降低了产量.在低频小灌量(5 d 18 mm)条件下,施氮对籽棉产量增加差异不显著,在对照(75;FC),3 d 18 mm和 5 d 30 mm三个水分处理中,对照(75;FC)在施N 450 kg/hm~2籽棉产量达到最高,3 d 18 mm,5 d 30 mm处理灌水量超过对照(75;FC),在施N 300 kg/hm~2时籽棉产量达到最高;在3 d 30 mm水分处理中,随着施氮量的增加,籽棉产量显著下降.从水氮综合效应对籽棉产量的影响看,5 d 30 mm-N300处理籽棉产量最高,达7 426 kg/hm~2;其次是3 d 18 mm-N300处理,籽棉产量为7 018 kg/hm~2,二者无显著差异.从产量构成因子角度看,花铃期干旱和水肥过多均显著降低了杂交棉花单株铃数、单铃重和衣分,而水氮互作条件下3 d 18 mm-N300和5 d 30 mm-N300两个处理均能获得较好的单株铃数、单铃重和衣分.[结论]5 d 30 mm-N300和3 d 18 mm-N300两个水氮组合为北疆杂交棉花较适宜的灌溉策略和施氮量.