控释氮肥对盆栽棉花产量及土壤养分状况的影响

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1、棉花学报CottonScience2015袁27渊5冤院401―407控释氮肥对盆栽棉花产量及土壤养分状况的影响*耿计彪袁张民袁李成亮袁郑文魁袁田晓飞(土肥资源高效利用国家工程实验室/国家缓控释肥工程技术研究中心/山东农业大学资源与环境学院袁山东泰安271018)摘要院通过盆栽试验袁研究了硫加树脂包膜尿素(PSCU)和树脂包膜尿素(PCU)2种控释氮肥及普通尿素对棉花产量及土壤养分变化的影响遥结果表明院控释氮肥一次基施较等氮量普通尿素一次基施子棉产量显著增加6.78%～28.91%袁但与等氮量尿素基施40%加追施60%处理产量差异不显著遥基施控释氮肥较尿素增加

2、了棉花铃重袁但对衣分和单株成铃数没有显著影响曰且显著提高了盛花期和始絮期土壤中的硝态氮和铵态氮含量袁同时也显著提高了初花期和盛花期土壤中的速效钾含量袁但不同处理间有效磷含量差异不显著遥因此袁在盆栽条件下袁控释氮肥一次基施既可满足棉花全生育期对氮素的需求袁又在保障产量的前提下减少了追肥次数遥关键词院控释氮肥曰普通尿素曰棉花曰产量曰土壤养分中图分类号院S562院S158.3文献标志码院A文章编号院1002-7807渊2015冤05-0401-0710.11963/issn.1002-7807.201505003*GengJibiao,ZhangMin,LiChen

3、gliang,ZhengWenkui,TianXiaofei(271018,)Atwo-yearpotexperimentwasconductedtocomparetheeffectsoftwocontrolled-releasenitrogenfertilizers(CRNF)includingpolymerandsulfur-coatedurea(PSCU)andpolymer-coatedurea(PCU),commonurea(U)andnonitrogen(N)treat-mentswiththesameamountsofphosphorus(P)a

4、ndpotassium(K)ontheyieldofcottonandchangesofsoilnutrients.There-sultsindicatedthatthecottonyieldinCRNFtreatmentswassignificantlyincreasedby6.78%-28.91%comparedwiththebasalureaapplicationtreatment,buttherewasnosignificantdifferencebetweentheCRNFtreatmentsandthetreatmentwithsplitureaf

5、ertilizationatpre-sowing(40%)andthefirstbloomstage(60%).Thebollweightwasincreasedby2.5%-11.32%withCRNFcomparedwiththebasalureaapplicationtreatment.However,thetypeofNfertilizerhadnoeffectonthelintpercentage,whichremainedat44.14%-46.67%,orbollnumbers.ThesoilNO－-NandNH+-Ncontentswerein

6、creasedintheCRNFtreatments34fromthepeakbloomstagetotheinitialboll-openingstagecomparedwiththebasalureaapplicationtreatment.ThesoilNO－-N3andNH+-Ncontentswereincreasedby20.98%-79.25%and12.51%-29.12%,respectively,inthepeakbloomstage,and50.31%-4171.24%and21.87%-40.57%intheinitialboll-op

7、eningstage.Atthesametime,theavailableKcontentinthesoilwasin-creasedwithCRNFfromthefirstbloomstagetothepeakbloomstagecomparedwithUtreatment.Thus,one-timeCRNFappli-cationnotonlymetthedemandforNoverthewholegrowthperiodofpottedcotton,butalsopreservedtheyieldanddecreasedthelaborcostoffer

8、tilizerdressing.con