Carbon Storage in Chimonobambusa utilis Forest in North Guizhou Province and Its Influencing Factors
Bamboo forest sink is an international concern,among which the sink in subdominant layer is a difficult point in observation and research.In this study,92 plots were investigated in the main distribution area of Chimonobambusa utilis(hereafter referred to as CU)in North Guizhou Province of China,of which pure forest plots accounted for 33.70%.The response of CU stand indexes to the carbon storage in pure CU forest and mixed CU forest as well as to the composition of the storage was analyzed.The results show that:1)The average aboveground carbon storage is 29.74 t/ha and 30.31 t/ha,the underground carbon storage is 16.07 t/ha and 18.16 t/ha,and the total carbon storage is 45.81 t/ha and 48.47 t/ha in the pure CU forests and the mixed CU forests,respectively,and the underground carbon storage and the total carbon storage in the pure CU forests and the mixed CU forest are significantly different.The carbon storage of different components in Ch.utilis forest shows the trend of culms＞rhizome＞leaves and branches＞bamboo basket,and the carbon storage in culms has the similar proportion along different age classes;2)The average soil carbon storage in pure CU forests and mixed CU forests(the total soil thickness at 40 cm)is 136.36 t/ha and 112.57 t/ha,respectively,with significant differences and the change trend of layer B＞layer A.Soil carbon storage is significantly associated between layers A and B,A and B and AB;3)The average aboveground carbon storage in pure CU forests and the shrubs in the mixed CU forests is 0.01 t/ha and 0.02 t/ha,respectively,and the average aboveground carbon storage in arbors and litters of the mixed CU forests is 12.63 t/ha and 2.14 t/ha,respectively;and 4)Bamboo carbon storage,shrub aboveground carbon storage,and vegetation aboveground carbon storage(bamboo,trees and shrubs)in the pure CU forests and the CU mixed forests are extremely significantly correlated with the average DBH and the density binary linear regression of the CU forests,and the average DBH and the density of the CU mixed forests are significantly correlated with the binary linear regression of carbon storage in soil layer A,B and AB.The study provides a science base for evaluating the carbon storage of CU forest and its influencing factors.
Chimonobambusa uitilispure forestmixed forestcarbon storagenorth Guizhou province
国家科技期刊平台
NSTL
万方数据
