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1、廣西農(nóng)業(yè)科學(xué)2010,41(8):800—803GuangxiAgriculturalSciences地下滴灌條件下氮磷鉀配施對甘蔗產(chǎn)量及其構(gòu)成因素的影響徐林I'2一,黃海榮1'2一,黃玉溢4,陳桂芬4,楊麗濤2一,李楊瑞2,3’5,6‘(1廣西甘蔗研究所,南寧530007;2中國農(nóng)業(yè)科學(xué)院甘蔗研究中心,南寧530007;3廣西大學(xué)農(nóng)學(xué)院,南寧530005;4廣西農(nóng)業(yè)科學(xué)院農(nóng)業(yè)資源與環(huán)境研究所,南寧530007;5廣西亞熱帶生物資源保護(hù)利用重點(diǎn)實(shí)驗(yàn)室,南寧530005;6廣西作物遺傳改良生物技術(shù)重點(diǎn)開放實(shí)驗(yàn)室,南寧530007)摘要:采用農(nóng)業(yè)部《測土配方施肥技術(shù)規(guī)范》推薦的“3414
2、”方案設(shè)計(jì),研究了地下滴灌條件下氮磷鉀配施對甘蔗產(chǎn)量及其構(gòu)成因素的影響。結(jié)果表明:在試驗(yàn)條件下,甘蔗產(chǎn)量最高的是處理N:P冰:,達(dá)114.0t/ha,比不施肥處理N以‰增產(chǎn)28.4%,達(dá)顯著差異水平;氮肥對甘蔗有效莖數(shù)和下部莖徑影響最大,其中對下部莖徑的影響達(dá)顯著差異水平,磷、鉀肥對甘蔗產(chǎn)量構(gòu)成因素也有一定影響;地上部分干重、有效莖數(shù)與甘蔗產(chǎn)量呈顯著正相關(guān),是決定甘蔗產(chǎn)量的主要因素。因此,實(shí)際生產(chǎn)中應(yīng)重視地下滴灌與氮磷鉀配方施肥技術(shù)的合理運(yùn)用,以提高甘蔗產(chǎn)量和效益,促進(jìn)甘蔗產(chǎn)業(yè)跨越式發(fā)展。關(guān)鍵詞:tg下滴灌;氮磷鉀配施;甘蔗;產(chǎn)量構(gòu)成因素中圖分類號:$566.106+.2文獻(xiàn)標(biāo)識碼:
3、A文章編號:1002—8161(2010)08-0800—04Effectsofcombinedapplicationofnitrogen,phosphorusandpotassiumonsugarcaneyieldanditscomponentswithsubsurfacedripirrigationXULinl’2’3HUANGHai-ron91’2,3HUANGYu-yi4,CHENGui-fen4,YANGLi-tao乞3,LIYang-rui2,3,5’6。(1GuangxiSugarcaneResearchInstitute,Nanning530007,China;2Su
4、garcaneResearchCenter,ChineseAcademyofAgriculturalSciences,Nanning530007,China;3AgriculturalCollege,GuangxiUniversity,Nanning530005,China;4AgriculturalResourcesandEnvironmentResearchInstitute,GuangxiAcademyofAgriculturalSciences,Nanning530007,China;5GuangxiKeyLaboratoryofSubtropicalBioresources
5、ConservationandUtilization,Nanning530005,China;6GuangxiCropGeneticImprovementandBiotechnologyLab,Nanning530007,China)Abstract:Afieldexperimentwasconductedtostudytheeffectsofcombinedapplicationofnitrogen(N),phosphorus∽andpotassium(K)onsugarcaneyieldanditscomponentsundersubsurfacedripirrigationus
6、ing‘3414’projectdesignwhichwasrecommendedbythetechnicalruleofsoiltestingandformulatedfertilization.Theresultsshowedthatunderex—perimentalconditionsthehighestsugarcaneyield(114.0t/ha)wasobtainedinthetreatmentofN2PoI(2,(375.00,0and420.00kg,}laN,P205andK20,respectively)and28.4%significantlyhighert
7、hanthetreatmentofN成&(NoN,PandKfertilizer).Nitrogenfertilizerwasthemostimportantfactorwhichaffectedthenumberofmillablestalksanddiameterofbot—tomintemodes.Theinfluenceofnitrogenondiameterofbottomintemodeswassignificant.Phosphorusand