The Influence Of Lumpish Cutting Regeneration On Carbon Storage Of Plantation Larix Principis-rupprechtii Mayr.

The reconstruction of low-function forest is the main way to improve the standstructure and increase the functions of forest carbon sink.The effection of carbonsinks,which in different management measures,is the key problem in the study of theforest management.The study relied on the management technical measures of Larixprincipis-rupprechtii Mayr. low-function forest which in Mulan Forest AdministrationBureau. Lumpish cutting regeneration of different areas was conducted in Larixprincipis-rupprechtii low function forest in2007. There had18sample plot. The carbonstorage of sapling,shrub,herb, litter and soil organic carbon were studied in2012.Afterobtained samples,we determined carbon stoage by potassiumdichromate-externalbeating,and then used the two-factor variance analysis for dataanalysis.The main results were as follows:(1)The influence of lumpish cutting regeneration to the sapling biomass:artificialplanted larix pricipis-rupprechtii biomass increased with the increase of selective pore area,Betula platyphylla reaches maximum value in the area of0.03hm2. Under the sameselective area, planting Betula platyphylla’s biomass were relatively higher than Larixprincipis-rupprechtii Mayr..For the shrub, when selective hole covers an area of0.03hm2, shrub biomass reachedmaximum.For specific performance,in the sample plot of Betula platyphylla,shrub biomassis0.03hm2>0.05hm2>0.02hm2, in the sample plot of Larix principis-rupprechtiiMayr.,shrub biomass is0.03hm2>0.02hm2>0.05hm2.For the biomass of herb, in the sampleplot of Betula platyphylla,shrub biomass is0.05hm2>0.02hm2>0.03hm2, in the sample plotof Larix principis-rupprechtii Mayr.,shrub biomass is0.03hm2>0.02hm2>0.05hm2. Alongwith the rising of the selective cutting hole area, the litter biomass reduced gradually,andthe litter biomass within the hole planting Betula platyphylla were higher.(2)The influence of lumpish cutting regeneration to the sapling carbon storage:underthe same selective area, planting Betula platyphylla’s carbon storage were relatively higherthan Larix principis-rupprechtii Mayr..For each sample plot, the carbon storage of saplingis proportional to the biomass. In the hole which planted same tree species,with theincrease of the area of selective cutting hole,carbon storage of Betula platyphylla sample plot showed climb up and then decline,while Larix principis-rupprechtii Mayr. sample plotshowed a trend of increasing.The influence of lumpish cutting regeneration to the shrub carbon storage:in thesample plot which planted the same species, with the increase of the area of selectivecutting hole,carbon storage of shrub showed climb up and then decline.It means whenselective hole covers an area of0.03hm2, shrub carbon storage reached maximum. Thecarbon storage of shrub is proportional to the biomass.For the herb, in the sample plot ofBetula platyphylla,herb carbon storage is0.05hm2>0.02hm2>0.03hm2, in the sample plot ofLarix principis-rupprechtii Mayr., herb carbon storage is0.02hm2>0.03hm2>0.05hm2. Withthe increase of the area of selective cutting hole, the carbon storage of litter showed a trendof decreasing.For soil organic carbon, under the same selective cutting area,the soil organic carbonstorage of artificial Larix principis-rupprechtii Mayr. were higher than Betula platyphylla.Organic carbon storage of soil in artificial regeneration Betula platyphylla forest showed:0.02hm2>0.03hm2>0.05hm2, planted Larix principis-rupprechtii forest showed:0.05hm2>0.02hm2>0.03hm2.(3) For carbon storage,within the hole which planted same tree species,with theincrease of the area of selective cutting hole,carbon storage of Betula platyphylla sampleplot showed a trend of decreasing,while Larix principis-rupprechtii Mayr. sample plotshowed climb up and then decline. Under the same selective area,planting Larixprincipis-rupprechtii Mayr.’s total carbon storages were relatively higher than Betulaplatyphylla. When selective cutting hole covers an area of0.03hm2,the sample area’s totalcarbon storages was maximum.Under the three areas,the total carbon storage whichplanting Larix principis-rupprechtii was higher6.06%,17.08%,197.72%respectively thanBetula platyphylla.