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三、采割松脂(下降法) 1.割面方向及采脂坡向的选择:在同一根立木上,向山坡内侧的背阴面,一般因自然打枝强烈,树枝干枯死亡较多,造成偏冠,导致向山坡内侧面的树干边材厚度小,年轮窄,树脂道数量少,材质坚硬;而向山坡外侧的受光面则相反,树冠较发达,边材较厚,材质嫩,年轮较宽,树脂道数量较多。因而向山坡内侧的背阴面的产脂量比向山坡外侧的向阳面
Third, cutting turpentine (descent law) 1. Cutting direction and the choice of picking slope: In the same root stand, to the inside of the hillside of the shady, usually due to strong natural branches, branches dead more deaths, resulting in partial Crown, leading to the inner side of the hillside trunk sapwood thickness is small, the annual ring narrow, fewer resin trails, hard material; and to the outer side of the light-receiving side of the contrary, the crown is more developed, thick sapwood, tender material, annual ring Wider, more resin road. Therefore, the amount of fat on the shady side of the hillside is higher than the sunny side of the hillside