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ID:38135259
大小:374.14 KB
页数:6页
时间:2019-06-01
《长白落叶松纯林改造对林地土壤性质的影响》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2009年12月中国水土保持科学V01.7NO.67(6):98—103ScienceofSoilandWaterConservationDec.2OO9长白落叶松纯林改造对林地土壤性质的影响王树力,沈海燕,孙悦,周延阳(东北林业大学林学院,150040,哈尔滨)摘要以黑龙江省林口林业局长白落叶松纯林带状伐后栽植阔叶树种形成的针阔混交林为对象,研究水曲柳、长白落叶松一水曲柳、长白落叶松、长白落叶松~胡桃楸与胡桃楸等5种林带下土壤的物理性质、养分状况和微生物数量。结果表明:长白落叶松纯林改造成针阔叶混交林初期,土壤密度随土层深度增加而显著增加
2、,土壤孔隙度则随土层深度增加而显著降低,林带间差异不显著;各林带有机质含量、养分元素全量及速效养分含量均随土层加深而显著减少,但全K含量变化不明显,阔叶林带及针阔林带土壤养分含量多高于落叶松林带,0~l0cm土层的全N、全P与全K含量最大分别提高13.99%、8.00%与11.23%,水解N、有效P与速效K含量最大分别提高18.84%、12.37%与6.71%;土壤细菌、真菌与放线菌主要集中在0~20cm土层,且随土层深度增加而减少,阔叶林带及针阔林带土壤微生物总量均高于落叶松林带,大小顺序为水带>落一水带>落一胡带>胡带>落带。研究结果可
3、为长自落叶松纯林改造提供科学依据。关键词长白落叶松;人工林;土壤性质;纯林;混交林EfectsofpureLar/xolgensisplantationimprovementonthesoilpropertiesWangShuli,ShenHaiyan,SunYue,ZhouYanyang(ForestryAcademy,N0r【heastForestryUniversity,150040,Harbin,China)AbstractPhysicalproperties,nutrientstatusandmicroorganismamount
4、ofthesoilwerestudiedafterpureolgensisplantationwaschangedtomixedplantationinLinkouForestBureauofHeilongjiangProvince.TheresultsshowedthatthediferenceofsoilbulkdensityandsoiltotalporosityofFraxinusbelt.r一Fraxi一凡belt,口beh,Larx-JuglansbeltandJuglansbeltwasnotsignificant,butth
5、atofdifferentsoillayerinthesameplantationbeltWassignificant,andthevaluereducedwithsoillayerdecline.Theamountofsoi1or.ganicmatter,totalnutrientelementsandavailablenutrientelementsreducedwithsoillayerdeclineexcepttotalK.Thenutrientamountofhardwoodbeltandmixedbehwashigherthan
6、thatofLarixolgensisbelt,theamountoftotalN.totalPandtotalKinsoillayerof0~10cmincreasedmaximum13.99%.8.00%and11.23%,andavailableN,availablePandavailableKinsoillayerof0—10cmincreasedmaximum18.84%,12.37%and6.71%respectively.Mostpartofmicroorganismdistributedinthesoillayerof0—2
7、0cm,andtheiramountreducedwithsoillayerdecline.Theamountdifferenceoftotalmicroorganism,bacterial,fungusandactinomycetesofdifferentbeltplantationwassignificant,ofwhichthedeclineorderoftotalmi-croorganismamountWasFraxinusbelt,一Fraxinusbelt,一Juglansbelt,Juglansbeltandbelt.Stud
8、yresultswouldprovideascientificbaseforolgensispureplantationimprovement.Keywordsolgensis;
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