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时间:2020-04-19
《基于主成分回归的土壤养分与水稻产量的关系.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、贵州农业科学2013,41(12):5O~54GuizhouAgriculturalSciences[文章编号]1OOl一3601(2013)12—0714—0050—05基于主成分回归的土壤养分与水稻产量的关系李云,冯跃华,王小艳,武彪(贵州大学农学院,贵州贵阳550025)[摘要]为了解农田系统内土壤养分对水稻产量的影响,根据土壤养分的含量预测水稻产量,利用主成分回归的方法研究贵州省安顺市西秀区文星村76个样点l1种土壤养分含量与水稻产量的关系。结果表明:1)土壤养分中,土壤有机质、碱解氮、有效磷、速效钾、全钾、有
2、效铜、有效铁和有效锰的含量分别为21.85~44.06g/kg、95.81~276.36mg/kg、7.07~58.88mg/kg、41.23~486.4mg/kg、8.33~27.84g/kg、1.91~12.42mg/kg、0.03~270.79mg/kg和0.002~83.33mg/kg,其余变幅较小。有效锰(113.74)为强变异,其他土壤养分和水稻产量均属于中等变异性。2)土壤养分与产量均存在相关性,但仅速效钾与水稻产量之间的相关性达到显著水平。土壤养分之间,有机质、全钾、有效铜和有效锌对土壤氮肥的影响较大,
3、有效磷对其他土壤养分的影响较小。3)得出回归方程y一8552.3238+47.5426x一85.7106x2+25.209Oz3+229.5989x4—10.635Ox5+197.7726z6—193.1247x7—44.4309x8+62.5105x9—76.9663z。+61.8409x速效钾、全磷、有效锌、有效锰、有机质、有效磷对水稻产量的影响较大,且按顺序逐级递减,其余土壤养分对产量的影响较小。[关键词]主成分回归分析;土壤养分;水稻;产量;安顺;贵州[中图分类号]S511[文献标识码]ARelationshi
4、pBetweenSoilNutrientandRiceYieldBasedonPrincipalComponentRegressionLIYun,FENGYuehua,WANGXiaoyan,WUBiao(CollegeofAgriculture,GuizhouUniversity,Guiyang,Guizhou550025,China)Abstract:Therelationshipbetweensoi1nutrientandriceyieldwasstudiedbytheprincipalcomponentregr
5、essionmethodfromanalyzing11soi1nutrientscontentof76samplepoints.Wenxinvillage.XixiuDistrict,Anshun。Guizhoutounderstandtheeffectofsoilnutrientscontentonriceyieldwithinthecroplandsystem.Theresultsshowedthat:1)Theorganicmatter,availablenitrogen,availableP,rapidlyav
6、ailableK,tota1K,availableCuandavailableFecontentwithamediumvariabilitywas21.85~44.06g/kg,95.81~276.36mg/kg,7.O7~58.88mg/kg,41.23~486.4mg/kg,8.33~27.84g/kg,1.9l~12.42mg/kgand0.03~270.79mg/kg0.002~83.33mg/kgrespectivelyandtheavailableMncontentwithahighervariabilit
7、ywas0.002~83.33mg/kg;2)TherewasacorrelationbetweensoilnutrientandriceyieldbutthecorrelationbetweenrapidlyavailableKandriceyieldreachedthesignificantlevelonly.Theorganicmatter。totalK。availableCuandavailableZncontenthadthegreatereffectonnitrogencontentinsoilbutava
8、ilablePhadthelessereffectonothernutrientsinsollamong11soi1nutrients:3)Theregressionequation,Y一8552.3238+47.5426x1—85.7106x2+25.209Oz3+229.5989x4—10.635Ox5+197.7726x6—
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