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1、西北林學(xué)院學(xué)報(bào)2014,29(2):66~7OJournalofNorthwestForestryUniversitydoi:10.3969/j.issn.100卜7461.2014.02.12石榴一綠豆間作系統(tǒng)土壤呼吸及其影響因子研究孟平,李春友,張勁松,劉文娟,陸森,楊海清。(1_中國(guó)林業(yè)利學(xué)研究院林業(yè)研究所,北京100091:2.河北農(nóng)業(yè)大學(xué),河北保定0710003.河南省林業(yè)科學(xué)研究院,河南鄭州450008)摘要:土壤呼吸是陸地生態(tài)系統(tǒng)碳循環(huán)的重要環(huán)節(jié),在維持全球碳平衡中發(fā)揮著重要作用。于2
2、010年6—10月,在黃河小浪底森林生態(tài)系統(tǒng)研究站,利用Li一8100紅外動(dòng)態(tài)土壤呼吸自動(dòng)觀測(cè)系統(tǒng)、溫濕度自動(dòng)觀測(cè)系統(tǒng)測(cè)定了石榴一綠豆間作系統(tǒng)(問(wèn)作系統(tǒng))和綠豆單作系統(tǒng)(單作系統(tǒng))土壤呼吸速率(sollrespirationrate,SRR)及土壤溫度和濕度。結(jié)果表明:1)問(wèn)作系統(tǒng)和單作系統(tǒng)的SRR日波動(dòng)在晴天一多云呈單峰變化趨勢(shì),在陰天日波動(dòng)變化幅度較小。間作系統(tǒng)的SRR高于單作系統(tǒng)。整個(gè)觀測(cè)時(shí)期內(nèi)間作系統(tǒng)和單作系統(tǒng)的平均SRR分別為2.996mol·m·s和2.378mol·m·s。2)間作系統(tǒng)
3、和單作系統(tǒng)SRR與15em處土壤溫度存在顯著的指數(shù)相關(guān)關(guān)系,在該深處的Q。值分別為2.462和1.7933)間作系統(tǒng)和單作系統(tǒng)與20cm處的土壤體積含水量與SRR的相關(guān)關(guān)系均不明顯。關(guān)鍵詞:石榴一綠豆間作系統(tǒng);綠豆單作系統(tǒng);土壤呼吸速率中圖分類(lèi)號(hào):$753.536文獻(xiàn)標(biāo)志碼:A文章編號(hào):1001—7461(2014)一02—0066—05SoilRespirationofPunicagranatum—PhaseolusradiatusIntercroppingSysteminHillyAreaofN
4、orthernChinaMENGPing,LIChun—you,zHANGJin—song,LIUWen-juan。,LUSen,YANGHai—Qing。(1.ResearchInstituteofForestry,CAF;StateForestryAdministration,Beijing100091,China;2.AgriculturalUniversityofHebei,Boading,Heibei071000,China;3.HenanAcademyofForestry,Zhengzh
5、ou,Henan450008,China)Abstract:Soilrespirationhasbeenshowntobeamajorcontributortothecarbonbudgetandplaysanim—portantroleintheglobalcarboncycle.Inthisstudy,soilrespirationunderthePunicagranatum—Phaseo—lusradiatusintercroppingsystem(IS)andP.radiatusmonocu
6、lturesystem(MS)weremeasuredbyLi一8100inXiaolangdiForestEcosystemResearchStationoftheYellowRiverduringthegrowingseasonfromJunetoSeptember2010.Therelationshipbetweenthesoilrespirationandenvironmentfactorswerestud—led.TheresultsshowedthatSRRinsunny—cloudyd
7、aysshowedasignificantdiurnalvariationintwosys—terns.TheSRRshowedasinglepeakcurveinbothsystems,andthefluctuationsatthecloudydayschangedlittle.ThechangesoftheSRRonsunny—cloudydayswereconsistentwiththevariationofsoiltemperature,andtheSRRoftheISwashigherth
8、anthatinMS.Duringthestudyperiod,theaverageSRRwas2.996/~molm。·sand2.378gmolm一·sforISandMS,respectively.Thetemperaturesensi—tivityofsoilrespiration(Ql0)fortheISandMSwere2.462and1.793,respectively.Nosignificantrela—tionshipwasobservedbetwe