摘要
以早熟杂交棉石杂2号为材料,在花铃期进行了7个水分处理和4个氮素处理的水氮互作对杂交棉花产量和水分利用效率影响的大田试验。研究结果表明,在不施氮(N0)情况下,花铃期轻旱和中旱显著降低了棉花产量。在低频小灌量(5 d-18 mm)条件下,施氮籽棉产量差异不显著;在高频大灌量(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;在对照(75%FC),高频小灌量(3 d-18 mm)和低频大灌量(5 d-30 mm)三个水分处理中,水氮互作显著提高了棉花的产量和水分利用效率。综合考虑产量和水分利用效率,在杂交棉花花铃期以低频高灌量和高频低灌量(日耗水量6 mm)两个水分处理在施N 300 kg/hm2时为北疆杂交棉花较适宜的灌溉策略和施氮量。
A field experiment,including seven water treatments and four nitrogen treatments,was conducted to evaluate the effects of interaction of water management and nitrogen fertilizer on yield and water use efficiency during flowering-bolling stage of hybrid cotton Shiza No.2 in Shihezi in 2008.The results showed that cotton yield decreased significantly under mild water stress and moderate water stress during flowering-bolling stage under the condition of no-nitrogen treatment but insignificantly compared with 5 d-18 mm irrigation in each level of N-application.With nitrogen increasing,the cotton yield decreased significantly in 3 d-30 mm water treatment.The cotton yield and water use efficiency increased significantly under 75% FC and 3 d-18 mm and 5 d-30 mm irrigation conditions.Therefore,it could be concluded from the comprehensive effect of interactions of water and nitrogen of cotton yield and water use efficiency that 5 d30 mm and 3 d-18 mm water treatments with 300 kg/hm^2 nitrogen rate were the optimal irrigation strategy and nitrogen application for hybrid cotton in Northern Xingjiang.
出处
《干旱地区农业研究》
CSCD
北大核心
2010年第3期19-26,共8页
Agricultural Research in the Arid Areas
基金
国家科技支撑计划项目(2007BAD44B07)
国家高技术研究发展计划(863计划)项目(2006AA100218-6)
兵团科技型中小企业创新计划(2006YD43)
新疆自治区农业科技成果转化项目(2008GB2G410378)
关键词
杂交棉花
水氮互作
产量
水分利用效率
北疆
hybrid cotton
water and nitrogen
interaction
yield
water use efficiency
Northern Xinjiang
