| Caribbean pine is the introduction of foreign species of gymnosperms, the species has characteristics of fast growth, strong adaptability, crown beautiful. And wood have texture delicate, wood compression and anti bending ability, as one of high-quality timber trees of coniferous species. Its developed roots, with water conservation, windbreak and sand fixation function, good ecological planting trees. And turpentine production in this species is high, quality is good, with great economic value.This paper study in 1982,and the centre of Caribbean pine plantation had planted in Guangxi slope forestry,as survey material and harvest sampling method was used for each species organ samples were collected, biomass, productivity and carbon storage analysis, and the method of stem analysis on the tree species growth rule, sums up the suitable for the growth of the tree species of forest management plan, provide scientific theory basis for the majority of forestry workers. The results of the study show that:1.32 year old Caribbean pine plantation of total biomass per plant up to 467.92kg strains-1,strain, wherein the Caribbean Pine Plantation for 378.58kg·strains-1, the Caribbean pine plantation underground part for 89.34kg·strains-1, accounted for the Caribbean pine plantation total biomass 80.91% and 19.09%. In the Caribbean pine plantation, biomass of each organ of the largest is the trunk ?213.2 kg? and individual Caribbean pine biomass is the smallest root 1.375kg, respectively, accounting for the total biomass per plant 45.56% and 0.29%.Individual Caribbean pine in different organs of biomass size arrangement ratio:trunk>bough>root stump>bark>branchlets>leaf>root diameter>litter>mid root>small root.2,32 years of Caribbean pine plantation, total biomass reach 300.3t·hm-2, The total biomass of the tree layer was the highest in the plantation, reach 296.20t·hm-2,Caribbean pine plantations accounted for 98.64% of total biomass,Plantation of Pinus caribaea divided into tree layer part and underground part respectively 239.64 t·hm-2 and 56.56 t·hm-2 Caribbean pine on biomass accounted for tree layer biomass and stand biomass amount 80.90% and 76.8% (and Caribbean pine underground parts were accounted for tree layer biomass and stand biomass amount 19.10% and 18.83%; Caribbean pine plantation of different biomass size order size as the litter layer> tree layer> shrub layer> herb layer, wherein, the distribution of forest biomass was found in the survey, the litter layer was significantly higher than that of forest living mulch ?shrub grass layer?.3. The productivity for 11.45t·hm-2·a-1 in 32 of Caribbean pine, in the Caribbean Pine Plantation in different layers of net productivity level of tree layer (11.12t·hm-2·a-1)> shrub layer (1.26t·hm-2·a-1)> herb layer (0.44t·hm-2·a-1.), respectively, accounting for total stand productivity of 97.12%,2.18% and 0.70%.4.The stem analysis analysis that Caribbean pine high, the growth law of DBH and total volume increment of basically the same, with the increase of age and growth,32 the growth respectively 18.2m, tree 33.1cm 0.553m3. high year after year growth amount maximum ?0.90? appeared in the 6A after afforestation, the average growth rate the highest in after planting the 9A. DBH in successive years of growth, the overall volume showed a increased at first and then decreased with the growth trend, average growth rate is the highest for the 22a of 1.1 cm. Volume of successive growth with age increasing first decreased and then increased and the annual growth peak volume for the 22a 0.035m3, volume mature age failed to determine.5.In the of Caribbean pine growth index of linear regression model fitting process. It is found that the tree height, diameter at breast height and stand age, the best fitting model of Richard model, stand volume and age, the best fitting model of sumach model, the three growth indexes, the best fitting model of phase identification coefficient R2 were above 0.997 and residual sum of squares were the biggest, in fitting the model validation process found the actual value and the fitting is close to the value of, error is small, and is suitable for application in forestry production.6.32a of Caribbean Pine Artificial forest carbon storage for 261.03 t·hm-2, the layer of vegetation carbon storage 142.70 t·hm-2, soil carbon storage for 118.34 t·hm-2. Caribbean pine tree layer in various organs of the carbon storage in proportion to the size of the order:trunk> Branch>root>bark>leaf>root diameter>root>small root. Caribbean Pine Artificial Forest shrub layer carbon storage:0.56 t·hm-2 Caribbean Pine Artificial Forest and grass layer carbon storage:0.18t·hm-2, and the Caribbean Pine Artificial forest litter layer carbon storage quantity is 1.12 t·hm-2. |
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