不同采脂方法对马尾松产脂量的影响

采用40％、50％、60％割面负荷率和天天割、隔天割的采脂方法，对不同密度的12、17和22年生马尾松林分进行采脂试验，结果表明，采割间隔期越短，割沟越长，越有利于松脂分泌；天天割的单位面积产脂量是隔天割的1．28倍，60％割面负荷率的平均单株单刀产脂量是40％、50％割面负荷率的1．19和1．07倍；中龄林采取40％割面负荷率和隔天割，近成熟林采取50％割面负荷率和隔天割的采脂方法，不但可获得较好经营效益，而且可延长采脂经营年限。

On the Resin Yield of Pinus massoniana with Different Tapping Methods

This study aimed to conduct resin tapping under different density forest of 12a,17a and 22a Pinun massoniana with tapping burden rate of 40%,50% and 60% at a tapping interval period of every day and next day.The results showed that the shorter the tapping interval period was,or the longer the tapping ditch was,the more resin yield was;the per unit resin yield tapped everyday was 0.28 times more than that of next day tapping;the average singletree and single-bark resin yield with a tapping burden rate of 60% was 1.19 and 1.07 times respectively more than that with a tapping burden rate of 40% and 50%;the tapping method with a tapping burden rate of 40% and next day tapping was adopted for medium-age forest and a tapping burden rate of 50% and next day tapping for mature-age forest,which not only produce a higher economic benefits,but also prolong tapping resin management years.