Effects Of Thinning On Carbon Storage In Cunninghamia Lanceolata Plantation

This study conceives Cunninghamia lanceolata plantation in zhejiang province as theresearch object, through the different intensity of tending thinning processing, adoptcontinuous sample plot survey and experimental analysis method, the biomass and carbon aremeasured, from tree layer, shrub layer, litter layer and soil layer four aspects to explore thetheory of Chinese fir plantation carbon impact. The main results were as follows:(1) After tending thinning, stand density, canopy density decreases with the increase ofthinning intensity, biomass decreases with the increase of thinning intensity, thus directlyrelated to the tree layer carbon is also decreases with the increase of thinning intensity.(2) Under different tending thinning intensity processing, Chinese fir plantationsundergrowth carbon are different. Increases with the increase of thinning intensity.Undergrowth layer thinning carbon intensity (H)> moderate thinning (M)> control treatment(CK). Understory plant species, respectively20(H),18(M) and17(CK), total density andundergrowth coverage all increase with the increase of thinning intensity; UndergrowthSimpson index, Shannon-Wiener index and Pielou evenness index had no significantdifference between different thinning treatment (P>0.05).(3) Cunninghamia lanceolata plantation was developed under different tending thinningintensity processing, litter layer carbon are different. Carbon content moderate thinning standsas high as49.05%, and litter layer carbon size and carbon content size relations don’t agreewith each other as the control treatment (CK)> thinning intensity (H)> moderate thinning(M).(4) Under different tending thinning intensity processing, Chinese fir plantation indifferent layers of carbon reserves. And along with the increase of thinning intensity increased.Layers of carbon intensity thinning (H)> moderate thinning (M)> control treatment (CK).Under the different strength of thinning processing, soil bulk density CK> M> H, waterholding capacity of CK <H<M, porosity CK <M <H, and the difference is significant, theclay, silt and sand distribution difference was not significant, so with the increase of thinningintensity, the soil quality is improved substantially.