施肥水平对甘蔗／大豆问作体系中植株生长及养分积累的影响-论文.pdf

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1、54广东农业科学2013年第10期施肥水平对甘蔗／大豆问作体系中植株生长及养分积累的影响曾巧英，黄莹，敖俊华，陈迪文，周文灵，李奇伟，江永(广州甘蔗糖业研究所／广东省甘蔗改良与生物炼制重点实验室．广东广州510316)摘要：采用盆栽方法研究了不同施肥水平下间作对甘蔗和大豆生长的影响以及问作优势。结果显示：间作大豆的各项植株指标与单作大豆差异不显著，不施肥可以刺激单作和间作大豆根系的生长，增加大豆根瘤数和根瘤重，而间作甘蔗各项指标大多数显著低予单作甘蔗，在不施肥的情况下下降幅度加大，但总根长两者间差异不显著；间作甘蔗的氮、磷、钾积累量均小于单作的甘蔗，以钾的降低幅度最大，而间作大豆仅在不施

2、肥的情况下磷、钾的积累量显著低于单作大豆，氮素在四种处理间差异不显著；两种施肥水平下间作的土地当量比(LER)均大于1，说明间作有明显的优势，并且问作的氮、磷、钾总养分累积量高于单作，由此可见甘蔗与大豆间作优势不是表现在个体上，而是表现在提高土地利用率上。关键词：甘蔗；大豆：间作；植株生长；养分累积量中图分类号：S147．2；S344．2文献标识码：A文章编号：1004—874X(2013)10-0054—0L4Efectoffertilizerlevelsonplantgrowthandnutrientaccumulationinsugarcane／soybeanintercroppi

3、ngsystemZENGQiao-ying，HUANGYing，AOJun-hua，CHENDi-wen，ZHOUWen-ling，LIQi-wei，JIANGYong(GuangzhouSugarcaneIndustrialResearchInstitute／GuangdongKeyLabofSugarcaneImprovementandBiorefinery，Guangzhou510316，China)Abstract：Inthisstudy，theplantgrowthinsugarcane／soybeanintercroppingsystemandtheintercropping

4、advantagewereevaluatedbyplotexperimentsunderdifferentlevelsoffertilizer．Theresultsrevealedthatplantgrowthparametershadnosignificantlydifferencebetweenintercroppingsoybeanandsolecroppingsoybean，whiletherootparameters，thenumberofnodulesandtheweightofnoduleswereimprovedundernofertilizer．Howevermosto

5、fgrowthparametersinintercroppingsugarcanedecreased，butthetotalrootlengthofsugarcanewasnotaffectedbyintercropping．Theaccumulationamountofnitrogen，phosphorousandpotassiuminintercroppingsugarcanewassignificantlylowerthanthatinsolecropping，whereasonlyaccumulationamountofphosphorusandpotassiuminintere

6、roppingsoybeanwassignificantlylowerthanthatinsolecroppingsoybeanundernofertilizer．TheLERvalueofnormalfertilizerandnofertilizerwereal1upto1，whichindicatingthattherewereintercroppingadvantagesundertwofertilizerlevels．Thetotalaccumulationamountofnitrogen，phosphorousandpotassiuminintercroppingsystemw

7、ashigherthanthoseinsoleintercropping．Alltheseresultsindicatedthattheintercroppingadvantagedidnotshowonthesingleplantbutonenhancinglanduserate．Keywords：sugarcane；soybean；intercropping；plantgrowth；nutrientaccumulationamo