不同立地指数湿地松纸浆林生长研究

Study on the growth of pulp forest of Pinus elliottii with different site indices

于泰格林纸集团公司在岳阳地区营造的不同立地指数的湿地松纸浆林设置样地,对不同立地指数林分的生长进行调查研究。结果表明:立地指数为15、13、11的14年生湿地松纸浆林平均树高分别为10.0、7.9、6.0 m,平均胸径分别为14.5、12.6、10.9 cm,林分单位面积蓄积量分别为145.4、92.0、55.7 m^3/hm^2。不同立地指数湿地松林单位面积蓄积量差别极大,立地指数为11的林分蓄积量仅为立地指数为15林分的38.3%,立地指数为13的林分单位面积蓄积量也仅为立地指数为15林分的63.3%。因此,在岳阳地区营造湿地松速生丰产纸浆林,应尽可能选择立地指数为15的林地。

Setting the sample survey according to the different of site indices on the pulp forest of Pinus elliottii that plan-ted by Tiger Fotest ＆ Paper Group Co.Ltd in Yueyang area,to research the stand growth of P.elliottii with the different site indices.The results show that the average tree height growth of the pulp forest of the 14-years-old P.elliottii with the different site indices of 15,13 and 11 are 10.0 m,7.9 m and 6.0 m respectively,and the average DBH growth are 14.5 cm,12.6 cm and 10.9 cm respectively,and the stand volume growth per unit area are 145.4 m3 /hm2 ,92.0 m3 /hm2 and 55.7 m3 /hm2.The volumes per unit area of P.elliottii with the different site indices are very different,the stand vol-ume of P.elliottii with the site index of 11 is 38.3% of the stand of P.elliottii with the site index of 15,and the stand vol-ume per unit area of P.elliottii with the site index of 13 is 63.3% of the stand of P.elliottii with the site index of 15.So constructing the fast-growing and high-yield pulp forest of P.elliottii for the best in Yueyang area is woodland with site in-dix of 15.