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《种植大豆对土壤磷、钾平衡的影响-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31卷第6期大豆科学V01.31No.62012正12月SOYBEANSCIENCEDec.2012种植大豆对土壤磷、钾平衡的影响郭昕,宋秋来,曾祥亮,龚振平,马春梅(1.东北农业大学农学院,黑龙江哈尔滨150030;2.黑龙江省农垦经济研究所,黑龙江哈尔滨150090)摘要:以5个春大豆品种为材料,采用框栽方法对大豆秸秆还田与不还田时土壤磷、钾的盈亏量进行估算,研究了种植大豆对土壤磷、钾平衡的影响。结果表明:大豆成熟期有57.2%~70.1%的磷素、60.7%一74.7%的钾素转移到籽粒中,磷、钾的收获率较高。在大豆施磷酸氢二铵75~150kg·hm和硫酸
2、钾40~120kg·hmI2水平下,土壤磷均有盈余,而土壤钾在施钾量低时亏损,高时盈余。大豆秸秆还田时,磷、钾的盈亏量分别为7.1~22.1kg.hm~、一7.6—25.6kg·hm~;秸秆不还田时分别为6.0~21.0kg·hm~、一14.3~18.9kg·hm~。大豆秸秆还田时,维持土壤磷、钾平衡的临界磷、钾肥用量为P:O18.4kg·hm~、KO29.2kg·hm~;秸秆不还田时,磷、钾肥的临界用量为PO520.9·hm一、KO37.3kg·hm~。可见,优化肥料施用量和秸秆还田是保障土壤磷、钾素平衡的重要措施。关键词:大豆;土壤磷;土壤钾;盈亏;秸秆还
3、田中图分类号:$565.1文献标识码:A文章编号:1000-9841(2012)06-0907-04EffectsofPlantingSoybeanontheBalancesofSoilPhosphorusandPotassiumGUOXin,SONGQiu.1ai,ZENGXiang.1iang,GONGZhen.ping,MAChun.mei(1.CollegeofAculture,NortheastAgriculturalUniversity,Harbin150030,Heilongjiang;2.HeilongjiangProvinceEconomic
4、alResearchInstituteofStateFarm,Harbin150090,Heilongjiang,China)Abstract:FivesoybeaneuhivarswereusedtOestimatetheeffectsofplantingsoybeanonprofitsandlossesofsoilphosphorusandpotassiumwithorwithoutstrawreturningbypotculture.Resultsshowed57.2%-70.1%oftotalphosphorusand60.7%一74.7%oftota
5、lpotassiumabsorbedbyplantsweretransportedtoseedsatmaturestage.Underthefertilizerapplicationlevelofdiammoniumphosphate75—150kg·ha。。andpotassiumsulfate40—120kg·ha~.thephosphorusofsoilwasprofitatalllevelsofP—fertilizer,andthepotassiumofsoilwaslossatlowlevelofK—fertilizerandwasprofitath
6、ighleve1.Theaverageprofitsandlossesofsoilphosphorusandpotassiumwere7.1—22.1kg·ha~and一7.6-25.6kg·ha~withstrawreturning.andwere6.0—21.0kg。ha~and一14.3-18.9kg·ha~withoutstrawreturning.respectively.Tobalancetheprofitsandlossesofsoilphos—phorusandpotassium,thecriticalamountsofphosphateand
7、potashfertilizerswereasfollows:P2O5andK2Owere】8.4kg‘ha一and29.2kg·ha一forstrawreturning,and20.9kg·ha一and37.3kg·ha一fornostrawreturningtreatments,respec—tively.Optimizingthequantityoffertilizerandreturningthesoybeanstrawwouldreachthebasicbalancesandreducethelos—sesofsoilphosphorusandpot
8、assiuminsoybeanfiel
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