金佛山方竹笋用林改造技术研究

Technical research of ghe rehabilitation of Chimonobambusa utilis plantations

在竹林年龄结构、密度、护笋养竹、竹木抚育、间伐物归林等方面实现对现有竹林的改造。示范基地连续4年固定样方的监测表明 ,小年亩笋均产量由改造前的9kg 增至改造后的43kg;改造后大年笋均产量为80kg;林分平均胸径增长率达28 6 % ;蓄留母竹平均胸径增长率达34 86 % ;竹林均高增长率为21 42 % ;大径级竹株数呈稳定增长 ;林分年龄结构趋于合理。林分年亩均生物量增加了11 % ,其林分最大截持水量也相应增加11 %以上 ;林地年亩均间伐物增加640kg,可增加地表层蓄水量2 5t左右。

Main improvement technological method of bamboo shoot-producing forest of Chimonobambusa utilis are contained in years structure、density、mother bamboo-retained and shoot-protected、stock proportion of bamboo and tree、thinning material-returned of bamboo forest、etc.Result from pre-reformed (1995) to reformed (1999) as:Average shoot output of the bamboo forest off-year is 43kg/667m2、that on-year is 80kg/667m2,average D.B.H of the bamboo stands increasing rate is 28 6%.Average D.B.H increasing rate is 34 86%.Average height of the stands increasing rate is 21 42%,The net increasing shoot output in 4 years are 427t or 540 thousands $(RMB).The rate of input and output is 1∶3.