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时间:2020-05-04
《川西南丘陵区人工桉树林土壤养分与水分变迁规律-论文.pdf》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、第42卷第9期东北林业大学学报Vo1.42No.92014年9月JOURNALOFNORTHEASTF0RESTRYUNIVERSITYSOp.2014川西南丘陵区人工桉树林土壤养分与水分变迁规律)王学春王红妮陶诗顺(西南科技大学,绵阳,621010)摘要深入研究四川盆地西南丘陵区人工桉林土壤养分和水分变迁规律.对当地桉林可持续生产和生态安全维护具有重要的现实意义。本研究采用空间变异代替时间序列的方法.分析该地桉林土壤养分和水分变迁规律。结果表明:①随着树龄的增加,桉林表层土壤(0—40am)有机质质量分数略有增加,深层土壤(60~100a
2、m)有机质质量分数增加不显著:全氮、全磷和全钾质量分数显著降低.其中0—40am土层土壤全氮质量分数变化幅度显著大于60—100em土层。②随着树龄的增加,桉林土壤水分质量分数显著降低;在沟槽平地1—6年生桉林对土壤水分的消耗以40~80em土层土壤水分为主;在丘陵坡地,13年生桉林对土壤水分的消耗以4080am土层土壤水分为主,3—6年生桉林对土壤水分的消耗以60—100am土层土壤水分为主。③与自然混交林相比.人工桉林对土壤养分的消耗较多。因此,可通过增加人工桉林(尤其是沟槽平地)的养分投入,缓解其对深层土壤养分的消耗.进而达到可持续生
3、产的目的。关键词人工桉树林;土壤养分;土壤水分;四川盆地分类号$727.32S0ilNutritionandSoilWaterChangingRegulationinArtificialEucalyptusForestLandattheSoutheastofSi.chuanBasin/WangXuechun,WangHongni。TaoShishun(SouthwestUniversityofScienceandTechnology,Mianyang621010,P.R.China)//JournalofNortheastForestryU
4、niversity.一2014.42(9).一66~71Byusingspatialvariationreplacetimeseriesmethod.westudiedthechan~ngregulationofsoilwaterandsoilnutri.tioninartifieialeucalyptusforestland.Withtheincreasingofeucalyptusforestage.soilorganicmatterslightlyincreasedin0-40amsoilanddidnotincreasesignif
5、icantlyin60-100amsoil.ThecontentsoftotalN.totalPandtotalKdecreasedsignificantlyin0-100cmsoil.Comparedwiththatin60—100amsoi1.thecontentsoftotalN.totalPandtotalKde.creasedmoresignificantlyin0-40emsoilwiththeincreasingofeucalyptusforestage.Soilwaterdecreasedwiththein-creasing
6、ofeucalyptusforestage.Artificialcuealyptustreesdepletedsoilwatermainlyin40—80amsoillayeminhillyandslopeland.However.invalleyandfiatlandthewaterwasmainlyin40—80cmsoillayersfor1—3yearoldeucalyptustrees,andmainlyin60-100cmsoillayersfor3-6yearoldeucalyptustrees.Comparedwithnat
7、uralmixedforest.thearti—ficialeucalyptusforestdepletedmoresoilnutrition.properlyincreasingnutritioninputforartificialeucalyptusforestlandwasbettertothesustainableproductionofwoodsatthesoutheastofSichuanBasin.KeywordsArtifieialeucalyptusforest:Soilnutrition:Soilwater;Siehua
8、nBasin桉树(Eucalyptusgrandis)又名尤加利树,是桃东、广西、海南、云南等省区均有零星栽培],在广金娘科(My~aceae)桉属(Eucalypteae)植物
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