毛竹笋材两用林丰产结构的初步研究

A preliminary study on the structure of high production of culm and shoot producing bamboo stands

对宜溧山区和宁镇丘陵区毛竹笋材两用林定点观测研究表明 :(1)良好的林分结构是竹林丰产的关键。以产笋为主、产竹为辅的毛竹笋材两用林丰产结构为每公顷立竹 2 70 0～ 330 0支 ,胸径>9 0cm ,年龄组成应保留Ⅰ～Ⅲ度竹 ,各龄级比例为 1∶1∶1,竹林产量 (竹材、竹笋 )高。以产竹为主、产笋为辅的毛竹材笋两用林丰产结构为每公顷立竹 2 70 0～ 36 0 0支 ,胸径 9 0cm ,年龄组成应保留Ⅰ～Ⅳ度竹 ,各龄级比例为 3∶3∶3∶1,竹材产量较高。 (2 )培育毛竹笋材两用林应改大小年竹林为花年竹林 ,花年竹林的产量增产 13%以上。 (3)培育毛竹笋材两用林 ,需提高竹林的经营管理(松土、施肥等 )水平 ,才能保证竹林 (笋、材 )

The research results showed that:Firstly,the suitable structure and number of bamboo are needed in bamboo forest.If the bamboo stands is mainly for shoot producing,its suitable number of bamboo is 2 700～ 3 300 culm/hm 2.Its breast high diameter is more than 9 0 cm.The composition of ages (Ⅰ～Ⅲ) of preservatory bamboo is 1∶1∶1.It can produce the high production of bamboo shoot.If the bamboo stands is mainly for culm producing,its suitable number of bamboo is 2 700～3 600 culm/hm 2.Its breast high diameter is 9 0 cm.The composition of ages(Ⅰ～Ⅳ)of preservatory bamboo is 3∶3∶3∶1.It can produce the high production of bamboo timber.Secondly,culturring the culm and shoot producing stands needs to keep high production yearly and it can increase 13% of the culm of bamboo.Thirdly,it needs to promote the level of management to ensure its sustainable high production and high effective. The first author’s address:Jiangsu Academy of Forestry,Jiangsu Nanjing 211153 China