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1、維普資訊http://www.cqvip.com第38卷第6期林業(yè)科學(xué)Vo1.38,No.62002年11月SCIENTIASILVAESINICAENOV.,2002雷竹高效栽培措施對(duì)土壤碳庫(kù)的影響姜培坤周?chē)?guó)模徐秋芳(浙江林學(xué)院臨安311300)摘要:采樣分析了高效栽培雷竹林土壤不同形態(tài)碳含量。結(jié)果表明:竹林土壤有機(jī)碳總量(c)接近天然馬尾松林,明顯高于相鄰板栗林地。雷竹土壤微生物生物量碳(c)出現(xiàn)了明顯下降的趨勢(shì),分別比馬尾松和板栗林降低了23.12%和12.63%,連年施用化肥竹林c和c/c下降輻度更大,近3a單用化肥
2、竹園土壤c和c/c比有機(jī)無(wú)機(jī)肥混施竹園降低了61.54%和58.82%,但隨著覆蓋年份增加,土壤c和c/c有上升的趨勢(shì)。雷竹園土壤活性碳含量(c)以及c/c保持與天然馬尾松林相同水平,近3a有機(jī)無(wú)機(jī)肥混施地塊土壤c和c/c是單施化肥地塊的1.39和1.23倍,隨著覆蓋年份增加土壤c也明顯增加,但穩(wěn)定態(tài)碳(C)沒(méi)有明顯的變化規(guī)律。雷竹園冬季覆蓋物補(bǔ)充了土壤水溶性有機(jī)碳(c)的庫(kù)源,使土壤c上升,覆蓋年份從1a到5a,土壤c增加了1倍,土壤c/c也增加了0.75倍。雷竹土壤c與c、c之間,c與c之間以及c、c、c與土壤全氮、水解
3、氮、有效磷、速效鉀之間相關(guān)性均達(dá)極顯著水平(P<0.O1);而土壤c與c、c、c、全氮、水解氮、有效磷、速效鉀之間相關(guān)性均不顯著。關(guān)鍵詞:雷竹,土壤有機(jī)碳總量,土壤微生物量碳,土壤活性碳,土壤水溶性有機(jī)碳,穩(wěn)定態(tài)碳EFFECToFD汀ENSI、廠】CULTⅣATIoNoNTHECARBoNPooL0lFSoILDPHYLLoSTACHYSPRAECoxSJiangPeikunZhouGuomoXuQiufang(ZhejiangForestryCollegeLin’an311300)Abstract:Differentfra
4、ctionsofsoilCweredetectedinPhyllostachyspraecoxstands.Itwasfoundthatthetotalsoilor-ganicC(CT)WasalmostthesameasthatofP/nusmassoniananaturalstands,buthi【gherthanthatofCasmeamollissimastandswhichisadjacenttoPhyllostachyspraecoxstands.SoilmicrobialbiomassC(CMB)decreas
5、edby23.12%(com—paredtoP/nus?llx~$oniana)and12.63%(comparedtoCasmeamoUissima).CMBandCMB/CTdeclinedmoreapparentlyincontinuouschemicalfertilizerapplicationstands.CMBandCMB/CTdecreasedby61.54%and58.82%respectivelyin3-yearchemicalfertilizerapplicationstandcomparedtothes
6、tandswithmixedapplicationofchemicalandorganicfertilizer.Continuousmulchingwithorganicmaterialinwinter,however,wasdetectedanincreaseinCMBandCMB/CT.SoilactiveC(CA)measuredby333mmol‘L一KMnO4andCA/CTsustainedthesamelevelwithP/nus?llx~$oniana.CAandCA/CTwererespective1.39
7、and1.23timesoverin3-yearcombiningapplicationofchemicalandorganicfertilizerrelativetomo·notonouschemicalfertilizerapplicationandCAwasincreasingwiththemulchingyears.MulchingmaterialinwinterWasal—soobservedtoresultagrowinginwater-solubleC(CWs),onetimesofincreaseinCWsW
8、asmeasuredfrom1一yearto5一yearmulchingstandsandcorrespondingCws/CTincreased0.75folds,butunactiveC(CuA)Wasobservednoincrease.Signif-icantrelationshi