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时间:2020-04-16
《启动氮加追氮对大豆干物质积累及叶生产力的影响-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第44卷第lO期东北农业大学学报44(10):6~102013年lO月JournalofNortheastAgriculturalUniversity0ct.2013网络出版时间2013—10—2515:21:28[URL]http://www.cnki.net/kcms/detail/23.1391.S.20131025.1521.001.h【ml启动氮加追氮对大豆干物质积累及叶生产力的影响刘志远L,董彦明,罗翔宇,孙文相,刘元英(1.东北农业大学资源与环境学院,哈尔滨150030;2.江苏科邦
2、生态肥有限公司,南京211100)摘要:采用框栽试验方法,在施用等量氮(N50kg·hm一。)条件下,研究氮肥不同施用时期对大豆干物质积累及叶生产力的影响。结果表明,基肥施氮15kg·hm加盛荚期追氮35kg·hm一(N15+35R4)既不会因大豆营养体过大造成群体郁闭,也不会因生长不足而影响后期干物质积累,并能延缓叶片早衰,提高大豆鼓粒期以后的净同化量和叶生产力(即单位干重叶片在单位时间内合成的干物质数量)。N15+35R4处理与氮作基肥一次性施用(N50)处理相比,鼓粒期后的干物质积累量增加2
3、4.5%(P4、stopdressingNondryma~eraccumulationandleafproductivityofsoybean[J].JournalofNo~heastAgriculturalUniversity,2013,44(10):6-10.(inChinesewithEnglishab-stract)Effectofstarter-NplustopdressingNondrymatteraccumulationandleafproductivityofsoybean/uuZhiyuan’一5、,DONGYanming,,LUOXiangyu,SUNWenxiang’,LIUYuanying’(1.SchoolofResourcesandEnvironmentalSciences,NortheastAgri—culturalUniversity,Harbin150030,China;2.JiangsuTechnologyUnionEco-fertilizerLdt.,Nanjing211100,China)Abstract:Apotexperimentwassettostudytheef6、ectsofNfertilizationatdiferentstagesondrymatteraccumulationandleafproductivityunderthesameNrate(N50kg·hm).Theresultsshowedthatcomparedwithothertreatments,starter—NplustopdressingNatgrowthstageR4(N15kg·hm。asbasalfertilizerandN35kg·hmastopdressing)treat7、mentkeptvegetativeorgansinpropersize,avoidingeitherplantselfshadingorreductionindrymatteraccumulation.Drymatteraccumulationinthistreatmentwasthehighestaf【ergrainfillingstage,24.5%higherthanN50(N50kg·hmasbasalfertilizer)treatment(P<0.01).TopdressingNat8、R4delayedleafsenescence,increasednetassimilationpostgrainfillingstageandleafproductivity(definedastheamountofdryweightaccumulationperunitdryweightofleavesinunittime1ofsoybeanplants.LeafproductivityofN15+35R4was165.4%greaterthanthatofN50,andthe
4、stopdressingNondryma~eraccumulationandleafproductivityofsoybean[J].JournalofNo~heastAgriculturalUniversity,2013,44(10):6-10.(inChinesewithEnglishab-stract)Effectofstarter-NplustopdressingNondrymatteraccumulationandleafproductivityofsoybean/uuZhiyuan’一
5、,DONGYanming,,LUOXiangyu,SUNWenxiang’,LIUYuanying’(1.SchoolofResourcesandEnvironmentalSciences,NortheastAgri—culturalUniversity,Harbin150030,China;2.JiangsuTechnologyUnionEco-fertilizerLdt.,Nanjing211100,China)Abstract:Apotexperimentwassettostudytheef
6、ectsofNfertilizationatdiferentstagesondrymatteraccumulationandleafproductivityunderthesameNrate(N50kg·hm).Theresultsshowedthatcomparedwithothertreatments,starter—NplustopdressingNatgrowthstageR4(N15kg·hm。asbasalfertilizerandN35kg·hmastopdressing)treat
7、mentkeptvegetativeorgansinpropersize,avoidingeitherplantselfshadingorreductionindrymatteraccumulation.Drymatteraccumulationinthistreatmentwasthehighestaf【ergrainfillingstage,24.5%higherthanN50(N50kg·hmasbasalfertilizer)treatment(P<0.01).TopdressingNat
8、R4delayedleafsenescence,increasednetassimilationpostgrainfillingstageandleafproductivity(definedastheamountofdryweightaccumulationperunitdryweightofleavesinunittime1ofsoybeanplants.LeafproductivityofN15+35R4was165.4%greaterthanthatofN50,andthe
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