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在很多地区,松林立木或者没有充分进行采脂或者未经采脂即行砍伐。在这些条件下,一般采用的硫酸糊膏采脂工艺,由于割面松脂产量较低,不能保证森林资源得到合理利用。拉脱维亚共和国用上述方法采脂,每采脂季开沟5—6次,间隔期采用21天时,每个割面可采松脂500—700克。而采用一般的维索茨金的双层割面采脂法,每采脂季开沟40次,间隔期为3天,松脂产量为850—1000克以上。十分明显,对于森林资源有限的地区(波罗的海
In many areas, the pine stands are either not adequately fattened or cut without being fattened. Under these conditions, the generally used sulfuric acid paste grease-extraction process can not ensure the rational use of forest resources due to the low yield of cut pine resin. The Republic of Latvia takes the fat by the above-mentioned method, dug 5-6 times for each picking season, and 500-700 grams for each face when taking 21 days for the interval. The use of the general Wesotzkin double cut face-picking method, ditch every picking season 40 times, the interval of 3 days, rosin yield of 850-1000 grams or more. Obviously, for areas with limited forest resources (Baltic Sea