 Wysłany: Śro 21:39, 26 Sty 2011 Temat postu: Slope of Three Gorges Reservoir area of vegetation |
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Slope of Three Gorges Reservoir area of vegetation - soil environment and land use study udyontheSlopeVegetation-SoilEnvironmentalChangeinShanxiaReservoirAreaandItsLandUtilizationHuangYulinZhaoHanzhangChertMingshanQiYueqingAbstractTheslopevegetationsuccessioninShanxiaReservoirAreahaeenchangedfromthesubtropicalevergreenforesttothenaturalcoppiceforest, barrenherbslopeandplantations. Itsforestcoveragedecreasedfrom45.5in1940to21.7inl985andtheforestsdistributedunevenly, shapinglikeisland, specklesandblocks. Thedeteriorationoftheslopevegetationledtotheunfertilesoilcharacteristics: contentofstoneparticlesinthesoilis6 ~ 30; thicknessofsoillayer40 ~ 60cm; textureofsoilsoft. During · thehearvrainingseason (April ~ 0ctober),ugg boots italia, soilerosionisserious. Besides, theirrationaIlandex-ploitationinthisareaintensifiedthesoilerosion. Tobringthechangeoftheslopevegetationandenvironmentundercontrol, thetechnology'ofplantingbio-living-fenceandagroforestrywasadopted. Themethodisusingthetreespecies, whicharefast-growing,ugg italia, easy-sproutingandgoodatfixingNforcontourlineplantingtopreventtheslopefromfurthererosion. Theplantspeciesselectedare: Robiniapseudoacacia, Vitexnegundo, Coriatqasire'ca, Leuc mouth f, & leucocephala, Amohafruticasa, Vetiverianigritana, Carexspp. , Arbor,north face outlet, shrubandherbspecies. 3yearsafterthecultivation, theforestcoverageincreasedto35andthecontentofmudandsandintherunningwaterfromtheslopewas3.3g / m, whilethatonthelandwithoutvegetationwas37.97g / m. KeywordsShanxiaReservoir · bio-living-fenee, agroforestryHuangYulin, AssoeiatePro / es. ~ Or,tiffany deutschland, ZhaoHanzhang · ChenMingshan, QiYueqing (TheResearch] nstitutE. FForestrvCAPBeiiing100091). |
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