增氧对水培棉花生长的影响研究

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1、棉花学报CottonScience2016,28(3):276―282增氧对水培棉花生长的影响研究1,2,312222*饶晓娟袁蒋平安袁付彦博袁冯耀祖袁王新勇袁王治国渊1.新疆农业大学草业与环境科学学院袁新疆乌鲁木齐830052曰2.新疆农业科学院土壤肥料与农业节水研究所袁新疆乌鲁木齐830091曰3新疆农业职业技术学院袁新疆昌吉831100冤摘要院通过水培试验研究增氧对棉花生长的影响曰试验设计3种增氧方式袁分别为持续性增氧(Physicalcontinu-ousoxygen,PCO)尧间歇性增氧(Physicaloxygen,PO)袁化学增氧(Chemicalox

2、ygen,CO)袁种棉花不增氧CK,不种棉花不增氧CK0曰研究结果表明袁不同增氧方式对营养液中溶解氧浓度都有不同程度的提高袁表现为PCO＞PO＞CO＞CK曰PCO处理对根体积尧根系总吸收面积尧根活性面积尧根系生物量尧株高尧地上部生物量尧氮和钾的吸收量的促进作用均达到显著水平袁分别比CK增加了194.62%尧261.89%尧301.73%尧57.15%尧22.76%尧38.03%尧35.27%尧84.78%曰间歇性增氧PO处理对根系生物量尧株高尧地上部分生物量的促进作用显著袁分别比CK高30.83%尧15.65%尧21.19%遥通过以上结果表明袁棉花对氧的需求敏感袁不

3、同增氧方式均能在一定程度上促进棉花生长袁其中持续性增氧效果尤为突出袁特别是对棉花生物量的积累袁说明增氧可以提升棉花生长潜力遥关键词院增氧曰棉花曰根系指标曰生物量曰养分吸收中图分类号院S562.01文献标志码院A文章编号院1002-7807渊2016冤03-0276-0710.11963/issn.1002-7807.2016030111,2,312222*RaoXiaojuan,JiangPing爷an,FuYanbo,FengYaozu,WangXinyong,WangZhiguo渊1.830052,;2.830091,;3.831100,)Thisstudyin

4、vestigatedtheeffectofaerationongrowthofhydroponiccotton.Threekindsofaerationweretested:continuousaeration(PCO);intermittentaeration(PO);andchemicaloxygen(CO).Inaddition,non-aerationwithcottonplanted(CK),andnon-aerationwithoutcottonplanted(CK0)werealsotested.Thedifferentoxygenationmeasu

5、respromoteddissolvedoxygeninthenutrientsolutionatdifferentdegreeswithPCO＞PO＞CO＞CK.TheeffectsofPCOtreatmentonrootvolume,roottotalabsorptionarea,rootactivityarea,rootdryweight,plantheight,amountofabove-groundbiomass,andpromotionofnitrogenandpotassiumuptakeincreasedby194.62%,261.89%,301.7

6、3%,57.15%,22.76%,38.03%,35.27%,and84.78%comparedwithCK,respectively;theeffectsofPOtreatmentonrootdryweight,plantheight,andamountofabove-grounddryweightre-sultedinsignificantincreasesof30.83%,15.65%,and21.19%comparedwithCK,respectively.Theseresultsindicatecottonissensitivetooxygen,anddi

7、fferentaerationmeasurescouldpromotethegrowthofcottontoacertaindegree.Theeffectofcontin-uousaerationisparticularlyprominent,withcottondryweightbeingespeciallysignificant.Aerationcouldconclusivelyenhancethepotentialofcottongrowth.aeration;dissolvedoxygen;cotton;roottraits;dryweight;nut