小篷竹林分密度初探

小篷竹天然林分密度研究结果表明:随着林分密度的增加，新竹平均地径、株高及小篷竹的出笋率逐渐降低，密度在30 000~45 000株·hm^-2时变化不大；小篷竹的出笋数、成竹数和成竹率先升高后下降，密度为45 000株·hm^-2左右时最高，且与30 000、60 000株·hm^-2区组有极显著差异。综合而言，试验密度为45 000株·hm^-2左右适宜小篷竹的生长发育。

Primary Approaching of Rational Management Density of Drepanostachyum luodianense

To establish the theoretical base of the management and cultivation for Drepanostachyun luodianense,and based on the block experiment with varied density,we tried to find out the most reasonable density for D.luodianense management by using LSD method with multiple comparisons.The results showed that as the density increased,the average basal diameter,plant height and emergence rate of new-born shoots gradually reduced.But the change was not obvious within the density of 30 000-45 000 plants·hm^-2;meanwhile,the emergence and survival rate and the number of mature bamboo increased first then decreased. All those indexes reached their highest points with the density of 45 000 plants·hm^-2,showing significant differences with the other two control groups.In a word,the density of 45 000 plants·hm^-2 was most suitable for the growth and development of D.luodianense.A optimal density of 45 000 plants·hm^-2 was suggested in practice.