采伐剩余物管理方式对二代杉木幼林生产力的影响

《采伐剩余物管理方式对二代杉木幼林生产力的影响》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、——一墨垡型叁塑篁堡查蒌翌三垡堑查垫整竺兰垄塑墅堕Threeyearsaftertreatment,atO-10cm，10-20Bmand20-40cmsoillayers，availableKincreased50．50％，21．25％and25．07％，respectively．Sixyearsaftertreatment，availableKsignificantlyreducedatallsoillayersthanthreeyearsaftertreatment．but5．34％higheratO-10cmsoillayerthanpre-harvestlev

2、el，anddecreasedat10-20cmand20-40cmsoillayersby8．16％and10．25％。respectively,thanpre-harvestlevels．Thereweresignific{mtchangesofavailableKatthedifferentsamplingtimes．Threeyearsaftertreatment，totalPandtotalKslightlyincreasedatallsoillayersindifferentsamplingtimes，butslightlyreducedatsixyears

3、aftertreatment，butwerealsolittlehigherthanpre-harvestlevel．Butnosignificantdifferencewasfoundbeweenthetreatments，TheonlysoilpropertybeingsignificantlyaffectedbyvarioustreatmentsWaSthepHvalueat0—10cmsurfacesoillayer．Threeandsixyearsaftertreatment,soilpHvalueatO一10cmsoillayerofnoslashtreat

4、ment(BL0)weresignificantlowerthanthoseofdoubleslashtreatment(BL3)andstemandbarkharvestandslashburningtreatment(SB)．RetentionofslashfromthefirstrotationplantationcouldincreasesoilpHvalue，andreducesoilacidity．Threeandsixyearsaftertreatment，organicCandtotalNcontentwerethehighestindoubleslas

5、hbranchestreatment(BL3)，butnoslashtreatment(BLo)orstemandbarkharvestandslashburningtreatment(SB)werethelowest，butnosignificantdifferenceswerefound．Threeandsixyearsaftertreatment，organicCandtotalNcontentslightlyincreasedordecreasedat0-10cmsoillayeronlyinstemandbarkharvesttreatment(Bk)andd

6、oubleslashtreatment(BL3)'butdecreasedsignificantlyintherestoftheother3treatments．Threeyearsaftertreatment，hydrolysisNWasnosignificantdifferenceat0-10cmand10-20cmsoillayersbetweendifferenttreatments，butsixyearsaftertreatment，hydrolysisNofdoubleslashtreatment(BL3)Wassignificanthigherthanth

7、oseofnoslashtreatment(BLo)．SoilavailableKWassignificantaffectedbydifferenttreatments．Threeyearsaftertreatment，soilavailableKat0-10cmand10-20cmsoillayersindoubleslashtreatment(BL3)weresignificantlyhigherthannoslashtreatmentfBLo)．SoiltotalPandtotalKwerelittleaffecedbydiffer