简介：ＤｅｖｅｌｏｐｉｎｇＨｏｍｅｇａｒｄｅｎＦｏｒｅｓｔｒｙ：ＡＧｏｏｄＷａｙｔｏＰｒｏｓｐｅｒｉｔｙｆｏｒｔｈｅＦａｒｍｅｒｓ￥ＢｙＬｉＪｕ，ａＣｈｉｎｅｓｅｗｏｍｅｎｆａｒｍｅｒ＇ｓａｃｃｏｕｎｔＩａｍｌｉｖｉｎｇｉｎｔｈｅｖｉｌｌａｇｅｏｆＤａｃｈ...

简介：更好在土壤上理解森林继任的效果微生物引起的活动，土壤的比较微生物引起的性质和营养素在代表自然森林继任chronosequence的三种森林类型之间被进行。学习比较了松(Pinusmassoniana)森林(P松和阔叶烟草混合了的F),森林(MF)并且一常绿树阔叶烟草森林(BYingzuijie生物圈储备地的F),，湖南省，中国。结果显示出那土壤在MF和BF阴谋比在PF阴谋。在微生物引起的生物资源碳的范围与B有最大的价值的F，5221022?mg?kg1,由MF368569?mg?kg1,并且最后，PF193449?mg?kg1。土壤营养素更强烈比基础呼吸或新陈代谢的商与微生物引起的生物资源碳被相关。总的来说，在学习地点的森林继任改善了玷污微生物引起的性质并且玷污富饶，它能接着增加主要生产率和碳隐遁。

简介：Thesubtropicalmixedbroad-leavedandconiferousforest,atypicalsuccessionalmonsoonforest,isoneofthemajorforestsinthesubtropicsofChina.Therefore,itisveryimportanttoestimatethefluxesofthegreenhousegasesfromtheforestsoilinordertoevaluatetheimpactofsubtropicalforestsonthegreenhousegasemissionsorabsorptions.Thisstudyinvestigatedthediurnalvariationsoffluxesofthreegreenhousegases(CO2,CH4,andN2O)fromamixedbroad-leavedandconiferousforestsoil.Astaticchamber-gaschromatographtechniquewasusedtomeasurethefluxesofthreegreenhousegases.Byusingtheimprovedgaschromatographysamplingsystem,thefluxeswereanalyzedwithasingleinjection.Inordertofindouttheeffectsoflitterandseedlingontheemissionsorabsorptionsofthesegreenhousegases,threetreatmentsweresetinthefleld:(1)baresoilsurface(litterwasremovedpreviously);(3)litter+soil;(3)seedling+litter+soil.TheexperimentalresultsdemonstratedthattheforestsoilwasasourceofCO2,N2OandaweaksinkofCH4.ThedailyfluxesofCO2,CH4,andN2Ofromthesoilsurfacewereintherangeof488.99～700.57,0.049～0.108and-0.025～-0.053mg/(m^2·h),respectively.CO2fromthelitterdecompositionaccountedforabout1/3ofthetotalCO2emissionfromthesoilsurface,whilethelitterandseedlinghadnosignificanteffectonthefluxesofCH4andN2O.ThefluxesofCO2andN2Omeasuredat9:00-11:00a.m.weresignificantlydifferentfromtheirdailyaverages.Therefore,cautionmustbetakeniftheCO2andN2Ofluxesmeasuredwithin9:00-11:00a.m.areusedforextrapolation.

简介：ＣＬＯＳＩＮＧＨＩＬＬＳＦＯＲＲＥＦＯＲＥＳＴＴＩＯＮ──ＡｎＥｆｆｅｃｔｉｖｅＷａｙｔｏＲｅｓｔｏｒｅａｎｄＩｎｃｒｅａｓｅＦｏｒｅｓｔｒｙＰｌａｎｔＣｏｖｅｒＴｏ“ｃｌｏｓｅｈｉｌｌｓ”（ｓａｎｄｐｌｏｔｓ，ｓｈｏａｌｓ）ａｎｄａｌｌｏｗｎａｔｕ...

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简介：Threeessentialfactorsofforestfire(firesource,environment,andlitter)weretakenasthepointofview,andhasapproachedtheforecastmethodofforestfireintropicalareaofsouthwestChinainamacroscopicscale.Thisstudysupportedbymathematicalmethodwasfromanewangle.Forexample,intheaspectofforestfireforecast,ithasbeenthoughtoverthatmostforestfireisartificialfire,whichhaslotsofrandomness.SoitcouldbestudiedinakindofMarkovrandomprocesses.Inthe...