棉花膜下滴灌灌溉制度及水肥耦合技术研究

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1、中国农业大学硕士学位论文棉花膜下滴灌灌溉制度及水肥耦合技术研究姓名：柴付军申请学位级别：硕士专业：农业推广·种植业指导教师：李光永;李明思20051101中国农业大学硕士学位论文摘要本文针对新疆干旱荒漠地区棉花膜下滴灌技术特点，在对膜F滴灌条件下，不同土壤质地(沙壤土、中壤土和重壤)土壤水分入渗研究的基础上，进行了棉花膜下滴灌灌溉制度和水肥耦合技术试验研究。试验结果表明：(1)在相同的滴头流量和滴水量情况下，横向湿润锋宽度：重壤土>中壤土>砂十，纵向湿润锋宽度：重壤土<中壤^七<砂土：(2)在石河子地区

2、正常年份情况。r，膜下滴灌棉花整个生育期内耗水量为500mm～600mm之间，苗期日均耗水量2．Onun／d以下，花铃期9mm／d，叶絮期4．Omm／d左右，灌溉定额为3000m3／hm03300m3／hm2，整个生育期灌水次数10次左右，每次灌水定额为225m：l／hJ-375m。／h珂2，花铃期灌水周期为7天左右。(3)最佳的水肥耦台参数为灌溉定额3300m3／hm2，全生育期施纯氮肥180kg／hm2225kg／hm2，一水一肥，水肥同步。各生育期滴施量按苗期5％左右，现蕾至开花25％一30％，开

3、花至吐絮为60％一65％，吐絮～成熟为5％左右控制。、关键词：棉花膜F滴灌．湿润锋，灌溉制度，水肥耦合AbstractAccordingtotechnologyapplicationcharacteristicofcotlonmulcheddripirrigationinSinkiang，experimentswereconductedtotestirrigationscheduleofcottonundermulcheddripirrigationandcouplingeffectofsoilwate

4、randfertilizeronthebaseofresultsofwaterinfiltrationintosoil．Theresultsshowedthat：(I)Underconditionofequalirrigationquantity，thewidthofhorizontalwettededgeoftheheavyloamislargerthantheoneofmoderateloam，thenthelatterislargerthanlightloam．，butthewidthofvert

5、icaloneisopposite．Whenthefluxofemitteris4litersperhourandtotalquantityis41．5[[tars，thewidthofwettededgereachto1．4meters，whichmakelayoutofonedriplinewithfourrowcroppossible，(2)Underconditionofnormalyear,thecoRonwaterconsumptionundermulcheddripirrigationis

6、aboutbetween500and600millimeters，duringtheseedling，booming—boilingandopenbollisrespective2，9and4mm／day．Intotalgrowthperiodtotalirrigationquantityis3000—3300m’／hm2，irrigationtimesisabout10times．Comparedcottonundermulcheddripirrigationwithfurrowirrigation，

7、thelintoutputofdripirrigationincreasedby24％，andsavedwaterupto61％．WUEis0．63．kg／m。．(3)Inthewholegrowthtimethebetterparametersofcouplingsoilwaterandfertilizerarethatirrigationrationis3000·3300m1／hm2，fertilizingpurenitrogen180--225kg／hm2，whichfertilize5％inse

8、edling，25—30％fromboilingtobooming．60-65％fromboomingtoopenbolland5％fromopenbolttomature．Keywords：Cottonundermulcheddripirrigation，Weuededge，Irrigationschedule，CouplingwaterandfertiIizer3独创性声明本人声明所呈交的论文是我个人在导师指导下进行的研究工作及取得的研