杨树发病诊断和防治

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1、http://www.tslhjd.com/http://www.tamingda.com/http://www.ylqzjpj.com/http://www.tongfageo.com/杨树发病诊断和防治杨树是我国华北、东北、西北造林主要速生树种之一,由于它具有生长快和适应性强等特点,因此广为群众所喜爱。杨树作为一种常见绿地树种和短周期工业原料树种,被认为是再生工业能源最有前途的树种之一。以其造林区域广、见效快、效益高等优点被广泛推广应用。但近几年,杨树在辽宁省绿地绿色通道及速生丰产林的建设方面及栽培管理和育苗市场上存在不少问题,严重制约了杨树的产业化进程。特别是杨树破腹病严重地影响了树

2、木生长和材质质量,致使有些地区还不敢冒然营造杨树速生丰产林。由于破腹病而引起杨树烂皮病等病虫害,大大降低了木材的经济价值,近年来,辽宁省杨树发展迅速,特别是一些杂交速生杨品种的出现,为造林主体在栽植品种选择上提供了广阔的空间。正是由于品种的门类繁杂,导致个别地区对新品种的盲目引进,由于没有做到适地适树,再加上近年来气候异常,造成一些地区速生杨树破腹病大面积发生,严重地影响着林分的生长状况、林木的材质及利用价值。PoplaristhenorthChina,northeast,northwest,oneofthefast-growingtreeoftheafforestation,becaus

3、eithasthecharacteristicsofgrowingfastandstrongadaptability,sowidelycrowdfavorite.Greenpoplarasoneofthecommontreespeciesandshort-cycleindustrialrawmaterialsspecies,isconsideredtobeoneofthemostpromisingspeciesrenewableenergyindustry.Withitsafforestationareawidely,quickeffect,highefficiencyhasbeenwid

4、elyapplied.Butinrecentyears,poplargreenspacegreenchannelinhttp://www.tslhjd.com/http://www.tamingda.com/http://www.ylqzjpj.com/http://www.tongfageo.com/liaoningprovinceandfast-grownforestconstructionandmanagementcultureandseedlingexistsmanyproblemsonthemarket,seriouslyrestrictedthepoplarindustrial

5、ization.Especiallypoplarbrokenabdomendiseaseseriouslyaffectthequalityoftreegrowthandmaterialandsomeareasalsodarenotpresumetobuildfast-grownforestofpoplar.Duetobrokenabdomendiseaseofpoplarrottenskindiseaseandotherdiseasesandpests,greatlyreducestheeconomicvalueoflumber,inrecentyears,therapiddevelopm

6、entofpoplarinliaoningprovince,especiallytheemergenceofsomehybridvarietiesoffast-growingYang,asthemainbodyintheafforestationhasprovidedabroadspaceinplantspeciesselection.Becauseofvarietiesofcategoriesmultifarious,resultingintheindividualregionalintroductionofnewspeciesofblind,sincethereisnodototheo

7、ptimaltree,coupledwiththeclimateanomalyinrecentyears,causingsomeareasoffast-growingpoplarbreaklargeabdominaldiseaseoccur,seriouslyaffectsthegrowthstatusofforest,treesshadingandusevalue.1新民地区自然概况1xinminregionalnat