施氮量和滴灌施肥频率对杂交棉氮素吸收和产量的影响  

Effects of Nitrogen Rate and Fertigation Frequency on Nitrogen Uptake and Yield of Hybrid Cotton

作　　者：祁通[1] 侯振安[1] 冶军[1] 阮明艳[2] 吕新[1] 郝志永[1] 时利尚[1] 

机构地区：[1]石河子大学农学院,石河子832003 [2]新疆天业集团农业研究所,石河子832000

出　　处：《棉花学报》2009年第5期378-382,共5页Cotton Science

基　　金：国家科技支撑计划课题(2006BAD21B02-2)

摘　　要：在滴灌条件下进行了不同氮肥用量和滴灌施肥频率对杂交棉氮素吸收和产量影响的大田试验研究,试验中设置3个施氮(N)(270、360和450 kg.hm-2)水平和2种滴灌施肥频率(5和10 d)。研究结果表明,不同氮肥用量和施肥频率显著影响杂交棉的干物质重、氮素积累量和子棉产量。在中氮(360 kg.hm-2)和低氮(270 kg.hm-2)水平下,增加滴灌施肥频率可显著促进杂交棉生长,增加干物质和氮素积累量;但是氮肥用量较大(450 kg.hm-2)时,滴灌施肥频率对棉花的生长影响不大。因此,在杂交棉的水肥关键时期,适当地提高滴灌施肥频率可以提高棉花产量。Effects of nitrogen rate and fertigation frequency on nitrogen uptake and yield of hybrid cotton were investigated through field experiment under drip irrigation conditions.The experiment comprised six treatments,with three nitrogen(N) rates(270,360 and 450 kg·hm-2) and two fertigation frequencies(5 and 10 d).It was found that nitrogen rate and fertigation frequency significantly influenced nitrogen accumulation,dry mass and yield of hybrid cotton.Under 360 and 270 kg·hm-2 of N rates,fertigation frequency w...

关 键 词：施氮量 滴灌施肥频率 杂交棉 产量 

分 类 号：S562.052[农业科学—作物学]