简介:ThispaperhighlightstheresearchanddevelopmentactivitiesbeingdoneonurbanforestryinthePhilippines.TherolethatR&Dplaysinurbanforestryislikewisediscussedintheintroduction.Recommendedtreespeciesforurbanplantingarepresentedincludingtheircharacteristicsanddistribution.Researchesrelatedtourbanforestrybeingconductedarelistedwithashortdescriptionofeachproject.Developmentactivitiesonurbanforestryarelikewisediscussed.Finally,recommendedR&DagendaandresearchableareasbasedonthePhilippineAgenda21andtheDepartmentofEnvironmentandNaturalResources(DENR)R&DFrameworkarepresented.
简介:ThehistoricaltransitionoftimberdistributionpatterninChinawaspresentedfirstlywithmainpartsoftimberflowsinChina,whichincludedtimbermarkets,timbertransportsystemandregulationsoftimbertransport.BasedontheoverviewontropicaltimberflowsinChina,thetradeflowsoftropicaltimberfromproductionandimportsoftropicaltimbertoexportoftropicaltimberproductswereanalyzedbyvividillustrations.Atthesametime,problemsintimbertradeflowsinChinawereanalysedintheend.
简介:<正>在芸芸树类中,有一群抵抗火魔侵袭的树——“消防树”。这些树之所以不怕火烧,是因为其树脂含量极少,树干树枝树叶的含水量特别丰富,萌芽再生力超强,根部分蘖力量顽强,有的甚至还富含克制火魔的四氯化碳。梓柯树:在众多“消防树”中,当推梓柯树为头号“灭火金钢”。此树树干高大,根深枝茂,四季常绿,生长在非洲安哥拉西部。叶片细长,状若纯情少女的长辫子。在繁茂的树枝或叶丛上,长满了无数的球状节苞,比普通人的拳头稍大些,貌若甜果。节苞里有密密麻麻的小孔,其间装满了富含四氯化碳的透明液体。当树邻发生森林火警或突遇火光时,苞壳就会自动破裂,迅捷喷出白色液体泡沫,泡沫到处,火源熄灭。