马尾松中龄林采脂效益分析

Analysis on Economic Benefits from Resin-yielding Stands of Middle-aged Pinus massoniana

开展16年生马尾松(Pinus massoniana)人工林采脂与非采脂林分生长对比试验,并对连续5年的采脂效益和11年的马尾松松脂和原木市场进行分析。结果表明,采脂对马尾松中龄林生长的负面影响显著,采脂处理平均胸径、树高、单株材积增量只有非采脂的65.2%、56.6%、60.5%,因采脂导致林分蓄积生长量减少为32.014 9 m3/hm2,风害损失为6.325 m^3/hm^2。松脂原料收购价格波动较大,整体呈上升趋势。原木市场价格较为低迷,不利于促进林农种植马尾松的积极性。采脂对林分原木收益有一定的负面影响,但采脂林总体的经济效益比未采脂林经济效益显著,能有效提高马尾松商品林经济效益和缩短投资回收周期。

The trial of resin-tapping and non-tapping on 16-year-old Pinus massoniana plantation was conducted to analyze the economic benefits resin-tapping for 5 consecutive years,the market of resin and lumber from 11-year-old pine trees. The results showed that resin-tapping exerted negative impacts on middle-aged masson pine. The average DBH,tree height and volume of single tree of the tapped plantation was only 65. 2%,56. 6% and 60. 5% respectively of the non-tapped trees. The stand volume decreased by 32. 014 9% and the losses by wind damage were 6. 325 m^3/hm^2. The purchase price for resin fluctuated greatly and was climbing on the whole. The price for lumber was low and bad for planters＇ enthusiasm. The overall benefits of tapped plantation were better than that of non-tapped plantation in improving the economic benefits and shortening the investment pay-back period.