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1、南方農(nóng)業(yè)學(xué)報(bào)JOURNALOFSOUTHERNAGRICULTUREISSN2095—1191：CODENNNXAABDOI：10．3969／j：issn．2095-1191．2013．2．253不同氮肥處理對(duì)桑園土壤酶活性的影響曾艷8，周柳強(qiáng)8，黃金生8，謝如林8，黃美福8，譚宏偉礦(廣西農(nóng)業(yè)科學(xué)院8農(nóng)業(yè)資源與環(huán)境研究所，6科技處：南寧530007)摘要：【目的】研究不同氮肥施用水平對(duì)桑園土壤過氧化氫酶、脲酶、酸性磷酸酶和蔗糖轉(zhuǎn)化酶酶活性的影響，為桑園合理施氮和生產(chǎn)優(yōu)質(zhì)桑葉提供依據(jù)?！痉椒ā坎捎?/p>
2、田間小區(qū)試驗(yàn)，按不同氮肥施用水平：N．(120．75kg／ha)、N：(172．50kg／ha)和N，(207．00kg／ha)設(shè)3個(gè)處理。測(cè)定不同處理的土壤酶活性，并與桑葉產(chǎn)量進(jìn)行相關(guān)性分析?！窘Y(jié)果】土壤脲酶和蔗糖轉(zhuǎn)化酶活性均隨著施氮量的增加而增加，其中N：處理的過氧化氫酶和酸性磷酸酶活性較大：土壤蔗糖轉(zhuǎn)化酶與脲酶活性、轉(zhuǎn)化酶與磷酸酶活性均呈顯著正相關(guān)，土壤脲酶、磷酸酶、轉(zhuǎn)化酶活性與桑葉產(chǎn)量呈極顯著正相關(guān)?！窘Y(jié)論】合理施用氮肥能提高桑園土壤蔗糖轉(zhuǎn)化酶、磷酸酶、脲酶活性；土壤脲酶和蔗糖酶活性可作為
3、評(píng)價(jià)桑園土壤性質(zhì)的指標(biāo)。關(guān)鍵詞：桑同；土壤酶活性；氮肥；產(chǎn)量；相關(guān)性中圖分類號(hào)：S154．2文獻(xiàn)標(biāo)志碼：A文章編號(hào)：2095一1191(2013)02—0253—04EnzymaticactivityofmulberrygardensoilusingdifferentnitrogenfertilizertreatmentsZENGYan8，ZHOULiu—qian98，HUANGJin—shen98，XIERu-lin8，HUANGMei—fu8．TANHong—wei“+(8Agrcuhural
4、ResourceandEnviromentResearchInstitute，“DivsionofScienceandTechnology，GuangxiAcademyofAgriculturalSciences：Nanning530007，China)Abstract：【Objective】Thepresentexperimentwasundertakeninordertostudytheeffectofnitrogenfertilizeronac—tivitiesofcatalase，urea
5、se，acidphosphataseandinvertaseinsoilforscientificexploitationofNfertilizerrationalapplica—tionandproductionofhighqualitymulberryleaves．【Method】Activitiesoffoursoilenzymeswereinvestigatedunderdif-ferentratiosofNfertilizersonmulberry．Therewerethreelevel
6、sofN，namelyNl(120．75kg／ha)，N2(172．5kg／ha)andN3(207．0k加a)inthefieldexperiment．Thesoilenzymesweredeterminedindifierentnitrogenfertilizertreatmentstoana—lyzecorrelationbetweensoilenzymaticactivityandmulberryleavesyield．【Result]Theresultsshowedthattheurea
7、seandinvertaseactivitiesweregenerallyenhancedwithbiggerNratio，butmaximalacid—phosphataseandcatalaseactivitieswereimprovedunderthemoderateamountofN2．Extremelysignificantpositivecorrelationswerefoundbetweenmulberryleafyieldandsoilenzymeactivitiesincludi
8、nginvertase，ureaseandacidphosphatase．Theinvertaseactivitywascloselyinterrelatedtotheactivityofphosphataseandurease．【conclusion】Rationalize0nitrogenfertilizercouldimprovetheactivitv．ofinvertase，phosphataseandurease．Soilureaseandinvertasecouldbe
