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苏联制定了湿枝叶及绝干枝叶收获量的国家标准21769—76。湿树叶的含水率:云杉55—65%,松50—60%:绝干枝叶量相当于饲料粉量。这个标准是根据白俄罗斯林业科研所科热夫尼科夫等的建议制定的.科热夫尼科夫等在一九八二年该所出版的《森林经营方法与规范》中介绍了自己的建议,主要是根据松林和云杉林的样木和标准地,测出树径、树高和树龄与树冠不同部位的枝叶蓄积的相关性,再参照单位面积的株
The Soviet Union has formulated the national standard 21769-76 for harvesting wet leaves and dried branches and leaves. Moisture content of wet leaves: spruce 55-65%, 50-60% of the dry: Absolute amount of dried leaves is equivalent to the amount of feed powder. This standard is based on recommendations of the Russian Forestry Research Institute Kesznikov etc .. Kovyvnikov et al. Introduced their own recommendations in the 1982 edition of “Forest Management Practices and Specifications” , Mainly on the basis of the sample trees and standards of pine and spruce forests, the correlation between the tree diameter, the tree height and the age of the branches and the accumulation of branches and leaves in different parts of the canopy were measured.