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1、應(yīng)用與環(huán)境生物學(xué)報2011，17(3):388~3922011-06-25ChinJApplEnvironBiol=ISSN1006-687XDOI:10.3724/SP.J.1145.2011.00388混作在黃土母質(zhì)生土改良中的應(yīng)用*楊珍平1郝教敏2苗果園1**1（山西農(nóng)業(yè)大學(xué)農(nóng)學(xué)院太谷030801）2（山西農(nóng)業(yè)大學(xué)食品學(xué)院太谷030801）摘要以黃土母質(zhì)生土為供試土壤，采用盆栽試驗，研究小麥與3種豆科牧草及油菜混作對根際土壤生物活性及土壤營養(yǎng)的影響.結(jié)果表明，黃土母質(zhì)生土混作較單作可顯著促進(jìn)根際土壤微生物的繁衍、酶活性及土壤營養(yǎng)的提高，且在混作根土系統(tǒng)中，三大微生物種群數(shù)量、多種土
2、壤酶活性以及土壤N、P、有機(jī)質(zhì)營養(yǎng)之間均存在顯著或極顯著的正向相關(guān)關(guān)系.4種混作處理以豌/麥根際土壤綜合效應(yīng)較好，可作為生土改良的首選混播作物.結(jié)果還顯示，在小麥生長期內(nèi)，混作根際微生物數(shù)量與酶活性及根際土壤營養(yǎng)均隨生育進(jìn)程呈前低—中高—后低的拋物線變化.研究為混作復(fù)合群體應(yīng)用于黃土母質(zhì)生土地改良提供了理論參考.圖3表1參23關(guān)鍵詞混作；黃土母質(zhì)生土；土壤改良；土壤微生物；土壤酶；土壤營養(yǎng)CLCS344:S156UtilizationofMixtureCroppingtoImproveImmatureLoessSoil*YANGZhenping1,HAOJiaomin2&MIAOGuoy
3、uan1**(1CollegeofAgriculture,ShanxiAgriculturalUniversity,Taigu030801,Shanxi,China)(2CollegeofFoodScienceandEngineering,ShanxiAgriculturalUniversity,Taigu030801,Shanxi,China)AbstractIno??e?e??oin?e??iga?ee?hee??e????o?mixo?mix?u?ee??oppingonoppingon?heimp?o?emenemen?o?imma?o?imma?u?ee?oe?????u??o
4、i?,,?ouou???in????o?po??e?mix?u?e??oppingwe?eapp?ie?a?:Whea?(Triticumaestivum)+?ape(Brassicacampestris),whea?+pea(Pisumsativum),whea?+a??a??a(Medicagosativa)an?whea?+??e?oi?(Trifoliumpratense)?o??u?y?he?io?ogi?a?a??i?i?yan?nu??i?ionintheimmatureloesssubsoil.Theresultsshowedthatmixturecroppingprom
5、otedsignificantlymultiplicationofrhizosphericmicrobes,andincreasedenzymeactivityandsoilnutritionintheimmatureloesssubsoilcomparedwithmonoculture.Intheroot-soilsystemsofmixturecropping,thereweresignificantorextremelysignificantpositivecorrelationamongthreetypesofmainmicrobes,enzymeactivitiesandN,P
6、andorganicmattersinsoil.Thetypeofwheat+peamixturecroppingwasthebestchoicetoimproveimmatureloesssubsoilbecauseofitscomprehensiverhizosphericeffects.Theresultsalsoshowedthattherhizosphericmicrobequantity,enzymeactivityandsoilnutritionchangedregularlywithparaboliccurveoflower—higher—?owe?a?whea?g?ow
7、?h??age.The??u?yp?o?i?e??heo?e?i?a?pa??e?n?o?imp?o?ingimma?u?e?oe???u??oi?un?e?mix?u?e??opping.Fig3,Ta?1,Re?23Keywordsmixturecropping;immatureloesssubsoil;soilimprovement;soilmicrobe;soilenzymeactivity;soilnutritionCLC
