生态因子对马尾松产脂的影响

Effects of Ecological Factors on Resin Yield of Pinus massoniana

对10年生(胸径16 cm以上)马尾松(Pinus massoniana)人工林进行1年的下降式采脂,采用定株、定时收获的观测方法,分析气温、降雨和坡位对产脂量的影响。结果表明:马尾松产脂量与气温显著正相关,松脂产量对气温变化较为敏感,大幅度降温容易导致松脂大幅减产;降雨对马尾松月产脂量影响不显著;松脂产量随坡位下降整体呈上升趋势。综合分析认为,采脂生产活动适宜在春夏季大幅降温天气结束后、秋冬季大幅降温天气出现前开展,以减少采割面损失,延长采脂年数,提高总体产量。

Effects of temperature,rainfall and slope position on resin yield of 10-year-old(DBH≥16 cm)Pinus massoniana plantation were analyzed in fixed trees at regular times by resin tapping for 1 year.Results showed that resin yield of P.massoniana was significantly positively correlated with temperature,and yield of resin was sensitive to temperature variation.Big drop of temperature easily led to significant decrease of resin yield.Effect of rainfall on monthly resin yield of P.massoniana was not significant,and the resin yield increased with decreasing of slope.According to comprehensive analysis,tapping activity was suitable to be carried out in spring and summer after big drop of temperature,autumn and winter before big drop of temperature in order to reduce loss of cutting face,extend tapping years and increase overall output.