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.