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1、第24卷第2期吉林農(nóng)業(yè)科技學(xué)院學(xué)報Vo1.24,No.22015年O6月JournalofJilinAgricuhuralScienceandTechnologyUniversityJune,2015干旱脅迫下不同施氮量對玉米開花期葉片生理指標(biāo)的影響金林峰,于海燕,呂艷杰(1.吉林農(nóng)業(yè)科技學(xué)院植物科學(xué)學(xué)院,吉林132101;2.吉林省農(nóng)業(yè)科學(xué)院,長春130033)摘要:玉米是耗水量大、對缺水較為敏感的作物,不同生育時期干旱對玉米產(chǎn)量影響不同,本試驗研究了水氮耦合對玉米開花期各項生理指標(biāo)及產(chǎn)量影響,結(jié)果表明:葉綠素含量、凈光合速率與蒸騰速率隨著施氮量的增加呈上升趨勢,3項生理指標(biāo)對照
2、區(qū)均大于干旱脅迫區(qū),在干旱脅迫區(qū)隨著施氯量增加丙二醛含量呈下降趨勢;當(dāng)施氮量超出一定范圍后,光合速率下降比葉綠素的含量較為迅速:對照區(qū)與干旱脅迫區(qū)玉米產(chǎn)量及百粒重的變化趨勢相近,隨著施氮量的增加玉米產(chǎn)量及百粒重均呈上升趨勢。且均以N2值最高。研究結(jié)果為干旱條件下合理施氮及玉米的高產(chǎn)栽培提供了理論依據(jù)。關(guān)鍵詞:干旱脅迫:施氮量;開花期:生理指標(biāo)中圖分類號:$513文獻(xiàn)標(biāo)識碼:AEfectsofDiferentAmountofNitrogenFertilizationonLeafPhysiologicalIndicatorsofCornintheFloweringPeriodJINLi
3、nfeng’,YUHaiyan’,LUYanjier.JilinAgriculturalScienceandTechnologyUniversitySchoolofPlantScience,Jilin132101;2.JilinAcademyofAgriculturalSciences,Changchun130033JAbstract:Cornisonekindofcropsofwaterconsumptionandmoresensitivetowatershortages,andtheeffectsofdroughtontheyieldofcornaredifferentindi
4、fferentgrowthstages.Inthetest,researchedtheeffectsofcouplingwaterwithNfertilizersoneveryphysiologicalindicatorsandtheyieldofcorninfloweringperiod.Theresultsshowedthatchlorophyllcontent,netphotosyntheticrateandtranspirationrateappearedupwardtrendwiththeamountofNitrogenfertilizationincreased,thr
5、eephysiologicalindicatorsincontrolareaswereallgreaterthanindroughtstressareas,indroughtstressareas,theamountofMDAappeareddownwardtrendwiththeamountofNitrogenfertilizationincreased;WhentheamountofNitrogenfertilizationbeyondacertainrange,netphotosyntheticratedeclinedmorerapidlythanchlorophyllcon
6、tent;Thechangingtrendsofcornyieldandkernelweightwerecloseincontrolareasandindroughtstressareas,thecornyieldandkernelweightappearedupwardtrendwiththeamountofNitrogenfertilizationincreased,andN2arethehighestvalue.TheresearchresultsprovidedthetheoreticalbasisforreasonablyfertilizingNitrogenandhig
7、h——yieldingcorncultivation.Keywords:Droughtstress;Nitrogen;flowering;physiologicalindicators水分是植物生長和發(fā)育的必要條件之一,土平的一半,吉林省80%的降水量集中在7~8月份,壤水分供應(yīng)是否適宜,直接影響到作物的發(fā)芽、出季節(jié)性干旱明顯。玉米是耗水量大、對缺水較為苗及生長,決定著作物物質(zhì)合成和生命進程l11。吉敏感的作物,干旱對玉米產(chǎn)量影響達(dá)20%~50%【31。林省是我國水資