西南稻区不同地域和施氮水平对杂交中稻氮、磷、钾吸收累积的影响

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1、万方数据作物学报A叽AAGRoNoMIcAs肿cA20ll，37(5)：882-894http：／／www．chinacrops．org／zwxb／ISSN0496—3490；CODENTsHPA9E—mail：xbzw@chinajournal．net．cnDOh10．3724／SP．J．1006．2011．00882西南稻区不同地域和施氮水平对杂交中稻氮、磷、钾吸收累积的影响徐富贤熊洪张林郭晓艺朱永川周兴兵刘茂四川省农业科学院水稻高粱研究所，l匹1)JI泸州646000摘要：以杂交中稻II优7号和渝香优203为材料，在两南稻区4省(市)的7个生态点采用相同的试验方案。研究了地理位

2、置、土化特性、施氮量对植株氮、磷、钾积累和分配的影响。结果表明，不同试验地点问稻谷产量、干物质产量、氮磷钾的吸收量、收获指数和每生产1000kg稻谷的氮、磷、钾需要量(RAGPPG)差异显著或极显著。施肥处理对稻谷产量、干物质产量、氮的吸收量、收获指数和RAGPPG中的氮有显著或极显著影响，对RAGPPG中的磷、钾影响不显著。氮、磷、钾收获指数问和RAGPPG问均挈极显著正相关，RAGPPG和收获指数均与稻谷产奄水平没有相关性。经逐步回归分析，RAGPPG和氮、磷、钾收获指数均分别与试验点所处地理位置、施肥水平及土化特性呈极显著线性关系，决定系数分别为0．5972—0．8404和0．

3、7637—0．8804。可作为制定各地水稻高产高效相应的氮、磷、钾施肥鼍的科学依据。关键词：杂交中稻；地理位置；土化特性；施氮量；养分利用效率CharacteristicsofNutrientUptakeandUtilizationofMid—seasonHybridRiceunderDifferentNitrogenApplicationRatesinDifferentLocationsofSouthwestChinaXUFu-Xian，XIONGHong，ZHANGLin，GUOXiao—Yi，ZHUYong-Chuan，ZHOUXing—Bin，andLIUMaoRiceand

4、SorghumInstitute，SichuanAcademyofAgriculturalSciences，Luzhou646000，ChinaAbstract：Thecharacteristicsofnitrogen(N)，phosphorus(P)andpotassium(K)uptakeandtheirutilizationofmid一辩asonhybridricewerestudied．Fieldexperimentwereconductedwithmid—seasonricecombinations11-you7andYuxiangyou203grownundertheco

5、nditionofdifferentecologicalsites．chemicalqualitiesofsoilandtllelevelsofNapplicationin2009．Byusingvariance，correlation．regressionandpartialcorrelationanalysis，theresultsindicatedthatsignificantorhighlysignificantdifferencesofgrainyield，drymatterproduction。uptakeamountandharvestindexesofN，只KandN

6、，P'Krequirementsofabovegroundplantsforproducingofl000kggrains(RAGPPG)wercfoundamongsevenlocations．Thereweresignificantorhighlysignificanteffectsoffertilizerapplicationtreatmentsongrainyield，drymatterproduction，uptakeamount，harvestindexandNamongRAGPPGbutnoeffectonPandKamongRAGPPCtl-fighlysignifi

7、cantlypositivecorrelationswereobservedamongharvestindexesofN．P’KandamongRAGPpQbutnotbetweenharvestindexesofN，P'K；RAGPPGandgrainyield．MultiplestepwiseregressionanalysisshowedthatharvestindexesofN，只KandRAGPPGweresignificantlyinfluen