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时间:2018-04-16
《返青至孕穗期控水对冬小麦氮素吸收与转运的影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、麦类作物学报2014,34(5):662-667JournalofTriticeaeCropsdoi:10.7606/j.issn.1009-1041.2014.05.14网络出版时间:2014-5-12网络出版地址:http://www.cnki.net/kcms/doi/10.7606/j.issn.1009-1041.2014.05.14.html返青至孕穗期控水对冬小麦氮素吸收与转运的影响范仲卿1,2,赵广才1,田奇卓2,常旭虹1,王德梅1,杨玉双1,亓振1(1.中国农业科学院作物科学研究所/农业部作物生理生态重点实验室,北京100081;2.山东农业大学农学院,山东泰安
2、271018)摘要:为了解冬小麦合理控水与氮素高效利用的关系,以中麦8号为材料,通过盆栽试验,应用15N同位素示踪技术,研究了返青至孕穗期的土壤水分对冬小麦氮素吸收转运特性的影响。结果表明,在本试验条件下,小麦吸收的氮素中,土壤氮占61.45%~65.33%,肥料氮占34.67%~38.55%。中度土壤水分处理(相对含水量70%)的籽粒氮素积累量最高,氮肥生产效率最高;低土壤水分处理(相对含水量55%)的开花期营养器官氮素积累量最低,肥料氮的土壤残留量最高,营养器官转运氮对籽粒氮的贡献率最高,籽粒氮素积累量最低;高土壤水分处理(相对含水量85%)的开花前营养器官积累的氮素向籽粒的
3、转运效率最低,氮素收获指数最小。由此得出,返青至孕穗期土壤水分亏缺和过多均不利于小麦高产和氮素的有效利用。关键词:冬小麦;返青至孕穗期;控水;氮素吸收与转运中图分类号:S512.1;S311文献标识码:A文章编号:1009-1041(2014)05-0662-06EffectofControllingSoilMoistureduringRevivingtoBootingStageontheAbsorptionandTranslocationofNitrogeninWinterWheat1,2,ZHAOGuangcai1,TIANQizhuo2,FANZhongqing1,WANG
4、Demei1,YANGYushuang1,QIZhen1CHANGXuhong(1.InstituteofCropScience,ChineseAcademyofAgricultureSciences/KeyLaboratoryofCropPhysiologicalandEcology,MinistryofAgriculture,Beijing100081,China;2.CollegeofAgronomy,ShandongAgriculturalUniversity,Tai′an,Shandong271018,China.)Abstract:Tostudytheeffectso
5、fcontrollingsoilmoistureduringrevivingtobootingstageontheab-15sorptionandtranslocationofnitrogeninwinterwheat,NtracingtechniquewasadoptedwithZhong-mai8asmaterialbypotexperiment.Theresultshowedthat34.67%~38.55%ofthenitrogenab-sorbedbywheatwasderivedfromfertilizerappliedand61.45%~65.33%wasderiv
6、edfromsoil.Thehighestyieldofnitrogenatkernelandnitrogenproductiveefficiencywasobtainedinthemiddlesoilmoisturetreatment(relativewatercontentwas55%).Thelowestaccumulationofnitrogenatanthe-sis,thelowestyieldofnitrogenatkernel,thehighestresidualoffertilizernitrogeninsoilandcontri-butionproportion
7、wereobservedinlowsoilmoisturetreatment(relativewatercontentwas70%).Whilethelowesttranslocationefficiencyofnitrogenfromvegetativeorganstokernelandnitrogenre-coveryindexwerefoundinthehighsoilmoisturetreatment(relativewatercontentwas85%).Basedon
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