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1、棉花學(xué)報CottonScience2015袁27淵5冤院408―416氮素對棉株上部果枝鈴軋葉系統(tǒng)生長及生理特性的影響**陳靜袁劉連濤袁王亞菲袁孫紅春袁張永江袁李存東袁路戰(zhàn)遠淵河北農(nóng)業(yè)大學(xué)/河北省作物生長調(diào)控實驗室袁河北保定071001冤摘要院以魯棉研28號為試驗材料袁不施氮肥為對照袁在大田條件下研究低氮淵120kg窯hm－2冤堯中氮淵240kg窯hm－2冤堯高氮淵480kg窯hm－2冤處理對棉株上部果枝野鈴軋葉系統(tǒng)冶的形態(tài)和生理生化效應(yīng)遙結(jié)果表明院1冤中氮和高氮顯著增加棉花上部果枝的長度堯葉面積袁高氮顯著降
2、低上部果枝近遠端直徑比曰2冤與對照相比袁中氮上部果枝鈴對位葉的葉綠素含量堯可溶性蛋白含量顯著增加袁上部果枝棉子的可溶性蛋白含量也顯著提高曰3冤中氮棉花果枝內(nèi)外圍鈴重最大袁結(jié)鈴后期顯著大于對照遙氮肥提高棉花上部果枝的纖維品質(zhì)袁以中氮內(nèi)外圍棉鈴的纖維品質(zhì)最優(yōu)遙表明施適量氮肥能增強棉花上部果枝的野源軋庫冶協(xié)調(diào)性遙關(guān)鍵詞院棉花曰氮素曰上部果枝曰鈴軋葉系統(tǒng)曰葉面積曰葉綠素含量曰可溶性蛋白含量中圖分類號院S562.01文獻標志碼院A文章編號院1002-7807淵2015冤05-0408-0910.11963/issn.1
3、002-7807.201505004**ChenJing,LiuLiantao,WangYafei,SunHongchun,ZhangYongjiang,LiCundong,LuZhanyuan(071001,)TheobjectiveofourstudywastoinvestigatetheeffectsofN-fertilizationrateonthemorphologicalandphysiologicalcharacteristicsofthe"boll-leafsystem"intheupperf
4、ruitbranchesofcotton.Toachievethis,weconductedatwo-yearexperi-mentwithLumianyan28asamaterial.Therewerefourlevelsofnitrogenfertilization:controltreatment(N0,0kg窯hm－2),lownitrogen(N1,120kg窯hm－2),moderatenitrogen(N2,240kg窯hm－2)andhighnitrogen(N3,480kg窯hm－2).Th
5、emainresultswereasfollows:1)nitrogenfertilizationimprovedthebranchlengthandleafarea,anddecreasedthediameterratioofnearandfarbranches.Thedifferencesbetweenthecontroltreatmentandthemoderateandhightreatmentsweresignificant.2)Chlorophyllandsolubleproteincontent
6、sintheupperfruitbranches'leavesandseedswereincreasedbynitrogenfertilization.Thechloro-phyllandsolubleproteincontentsintheupperfruitbranches'leavesinthemoderatetreatmentweresignificantlyhigherthaninthecontrol.Thesolubleproteincontentintheupperfruitbranches's
7、eedsinthemoderatetreatmentwassignificantlyhigherthaninthecontrol.3)Withincreasingnitrogenfertilizer,thebollweightoftheupperfruitbranchesfirstincreasedandthende-creased.Thebollweightinthemoderatetreatmentwashigherthanintheothertreatments.Atthelatebollingstag
8、e,thediffer-encesbetweenthemoderateandcontroltreatmentsbecamesignificant.ThefiberqualitywasincreasedbyNapplication,andthemoderatetreatmenthadthebestqualityintheupperfruitbranches.Themorphologicalcharac
