| This paper studied the new moso bamboo carbon(Phyllostachys edulis)sequestration forest with different planting patterns of uniform planting and group-planting in Yanjia Mountain in Lin’an city,Zhejiang Province.Keeping monitoring the new moso bamboo continuously and uninterruptedly in fixed sample plot.Using spatial distribution index to analyze the influence of the interannual variation characteristics for spatial pattern and competitive relation between new moso bamboo and live moso bamboo in the early stage of moso bamboo carbon sink stands with different planting patterns.At the same time,taking advantage of ArcGIS spatial analysis function to analyze the influence of planting pattern and the tiny terrain to the forest stand structure in new moso bamboo forest.This research aimed to provide a scientific gist for constructing and managing the moso bamboo forest and carbon sink forest,meantime,it could also provide a scientific assistance in the measurement and monitoring of carbon sink of forest and the technologies of increasing sequestration.The main results were as follows:(1)With five years’ afforestation,the spatial patterns of new moso bamboo forest presented an aggregation distribution pattern with different planting pattern,and the moso bamboo forest existed the group aggregation distribution in the distance scale of 1.5m and 6.1m and 9m.From the year 2009 to 2013,New moso bamboo’s aggregation index in uniform planting moso bamboo forest was from 0.18 to 0.63,and live moso bamboo’s was ranged from 0.18 to 0.52;In group-planting moso bamboo forest new moso bamboo’s and live moso bamboo’s aggregation index were from 0.38 to 0.76 and 0.45 to 0.60,respectively.(2)In the early stages of new moso bamboo stands,it had significant correlation between the number of stand live bamboo and the index of spatial distribution.The number of stand live bamboo(x)and aggregation index(R)were fitted exponent model of:R = 0.1037x0.4193,R2 = 0.9379,and the allometric equation for the number of stand live bamboo(x)and competition index(CI)with linear regression was CI=-0.0032x2 +0.3617x-0.0474,R2 = 0.9941 in uniform planting moso bamboo forest.In group-planting moso bamboo forest,the linear regression for the relationship between the number of stand libe bamboo(x)and aggregation index(R)was projected to be R =0.00004x2-0.0027x + 0.5047,R2= 0.9836,the allometric equation for the number of stand live bamboo(x)and competition index(CI)with linear regression was CI =-0.0012x2 + 0.2367x + 3.2046,R2 = 0.9899.(3)Maintaining the diameter of moso bamboo between 4.5 cm and 7.5 cm in new moso bamboo forest could control the intraspecific competition intensity effectively,enhancing the stability of the bamboo forest.Meantime it could also improve the level of moso bamboo’s production and the capacity of carbon sequestration.(4)The discrepancy of each stand structure factor in moso bamboo forest was different.The discrepancy of stand density between each unit was different,the number of stand live bamboo were ranged from 1 to 27,the coefficient of variation(CV)was 0.71.The difference of mean DBH(diameter at breast)and mean culm height was little,the coefficient of variation were 0.26 and 0.1 8,respectively.(5)Slope had significant effect(P=0.041<0.05)on the stand density of moso bamboo forest,and it had highly significant effect(P=0.002<0.01)on biomass and carbon stock of moso bamboo forest.The interaction of planting pattern and slope had highly significant effect(P=0.008<0.01)on mean DBH of stands.The interaction of slope and aspect had significant effect(P=0.02<0.05)on mean culm height of stands.The stand density and biomass and carbon stock effected by slope is Ⅱ>Ⅰ>Ⅲ>Ⅳ>Ⅴ>Ⅵ>Ⅶ>Ⅷ. |
PDF Full Text Request