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时间:2019-02-27
《有机无机肥配合施用对土壤-水稻系统重金属平衡和稻米重金属含量的影响》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、中国水稻科学(ChineseJRiceSci),2006,20(5):517~523http://www.ricesci.cn;http://www.ricescience.org517-有机无机肥配合施用对土壤-水稻系统重金属平衡和稻米重金属含量的影响孔文杰1,2倪吾钟1,*(1浙江大学环境与资源学院,浙江杭州310029;2菏泽学院,山东菏泽274000;*通讯联系人,E-mail:wzni@zju.edu.cn)EffectsofIntegratedFertilizationwithCommercialOrganicManureandChemicalFertilizersonHeavyM
2、etalBalanceinSoil-RiceCroppingSystemK1,21,*ONGWen-jie,NIWu-zhong12(CollegeofEnvironmentalandResourceSciences,ZhejiangUniversity,Hangzhou310029,China;HezeCollege,Heze274000,China;*Correspondingauthor,E-mail:wzni@zju.edu.cn)Abstract:Afieldexperimentwasconductedwithriceplantstoassesstheeffectsofintegra
3、tedfertilizationonheavymetalbalanceinsoil-ricecroppingsystemandricehygienicquality.Fourtreatmentsaschemicalfertilizers,chemicalfertilizers+lowerrateoforganicmanure,chemicalfertilizers+mediumrateoforganicmanure,andchemicalfertilizers+highrateoforganicmanureweredesignedwithfourreplicationsforeachtreat
4、ment.ThedosesofN,P2O5,andK2Oofalltreatmentswereequalat225,112.5and150kg/hm2,respectively.Thedifferencesofabove-groundbiomassandgrainyieldofriceplantsamongtreatmentswerenotsignificant(P>0.05).Cadmiumconcentrationinbrownriceincreasedwiththeincreaseintheratiooforganicmanureapplied.HealthriskexistedasCd
5、concentrationinbrownriceunderthetreatmentswithmediumandhighrateoforganicmanurewereashighasthelimit(0.2mg/kg)incereals.Itwasalsofoundthatzincandcopperdefi-citsinthesoil-ricesystemoccurredunderthetreatmentswithnoorganicmanureorlowerrateoforganicmanure.Integratedfertilizationwithappropriaterateoforgani
6、cmanureandchemicalfertilizerscouldnotonlycontributetomaintainingthebal-anceofzincandcopperasmicronutrients,butalsominimizetheriskofheavymetalpollutioninthecroppingsystem,whichcanberegardedasaneffectivemannerfortheconstructionofsustainableagriculture.Keywords:chemicalfertilizer;organicmanure;integrat
7、edfertilization;heavymetalbalance;rice;cropproductionsafety摘要:通过田间试验研究了有机无机肥配施对土壤-水稻系统重金属平衡的影响。试验设置化肥(T1)、化肥+低量有机肥(T2)、化肥+中量有机肥(T3)、化肥+高量有机肥(T4)等4个处理,各处理施肥量相等,重复4次。试验结果表明,在等养分条件下,不同施肥处理对水稻地上部及籽粒的干质量没有
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