資源描述：
《作物間作對油菜積累鎘與鉛的影響》由會員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、第24卷第3期水土保持學(xué)報Vol.24No.32010年6月JournalofSoilandWaterConservationJun.,2010*作物間作對油菜積累鎘與鉛的影響1,2221向言詞,官春云,黃璜,彭秀花(1.湖南科技大學(xué)生命科學(xué)學(xué)院,湖南湘潭411201;2.湖南農(nóng)業(yè)大學(xué)油料作物研究所,湖南長沙410128)摘要:采用盆栽試驗(yàn),研究了與黑麥草(Loliumperenne)及紫云英(Astragalussiniucus)間作對芥菜型油菜(Bras2sicajuncea)和甘藍(lán)型油菜(B.n
2、apus)積累鎘與鉛的影響。結(jié)果表明:單種和混種紫云英顯著增加土壤氮,單種和混種油菜及黑麥草顯著降低土壤氮。栽培植物增加土壤的堿解氮、速效磷、速效鉀和有機(jī)質(zhì),單種紫云英顯著降低土壤pH值。間作時,兩種油菜的生物量顯著增加,其SOD活性顯著降低,黑麥草和紫云英的SOD活性顯著增加,兩種油菜的鎘和鉛含量顯著降低,黑麥草和紫云英的根部的鎘和鉛含量顯著增加,兩種油菜地上部和根部的鎘與鉛的生物富集系數(shù)顯著下降,黑麥草和紫云英的根部的鎘和鉛的生物富集系數(shù)顯著增加。因此,與黑麥草及紫云英間作可減少油菜積累鎘與鉛,降
3、低重金屬對人類危害。關(guān)鍵詞:油菜;鎘;鉛;間作中圖分類號:X53文獻(xiàn)標(biāo)識碼:A文章編號:100922242(2010)0320050206EffectsofIntercroppingonAccumulationofCdandPbinOilseedRape1,2221XIANGYan2ci,GUANChun2yun,HUANGHuang,PENGXiu2hua(1.SchoolofLifeScience,HunanUniversityofScienceandTechnology,Xiangtan4112
4、01;2.ChinaInstituteofOilCrops,HunanAgriculturalUniversity,Changsha410128)Abstract:Apotexperimentwasconductedtoinvestigatetheeffectof2intercropsonCdandPbuptakebytwooilseedrapespecies,BrassicajunceaandB.napus.Theintercropsincludedryegrass(Loliumperenne)an
5、dChinesemilkvetch(Astragalussiniucus).Monocroppedandintercroppedchinesemilkvetchsignificantlyincreasedsoiltotalnitrogen.Monocroppedandintercroppedoilseedrapesandryegrasssignificantlydecreasedsoiltotalnitrogen.SoilavailableN,P,K,andorganicmatterincreased
6、withmonocroppingandintercrop2pingtheseplants.SoilpHsignificantlydecreasedwithplantingChinesemilkvetchalone.Intercroppingsig2nificantlyincreasedbiomassforbothoilseedrapes.SODactivityofseedling,contentsofCdandPbintissuesandbioconcentrationfactorofbothmeta
7、lsweregreatlydecreasedforbothoilseedrapesintercroppedwithryegrassandChinesemilkvetch.IntercroppinggreatlyincreasedSODactivityofseedling,CdandPbcon2tentsinroot,andbioconcentrationfactorofmetalsinrootforryegrassandChinesemilkvetch.Theresultssuggestedthati
8、ntercroppingmightbeafeasibletoolindecreasingaccumulationofCdandPbbyoilseedrapeandreducingtheriskofmetalstohumanbeings.Keywords:oilseedrape;cadmium;lead;intercropping72我國受Cd、Pb等重金屬污染的耕地面積近2.0@10hm,對大面積受中、低度重金屬污染的土壤實(shí)行休耕會影響糧食生產(chǎn),這在我國
