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一些学者(M·达柯夫.H·巴谢夫.B·弗拉谢夫)确定,簇植(3-4株)的25年生欧洲松人工林比行植(每穴1株)多得木材1.6倍。 H·尼基吉娜(1952、1958年)和A·姆莉娜(1953年)认为,每穴2—8株生长比只长一株树材积可增加1—5倍。柯拉洛维姆和柯勒切维姆(1977年)得到类似的结果。株行距为6×5米的Ⅰ—214杨树无性系伐后,设置了两块标准地。第一块每个伐根留一个萌蘗条,第二
Some scholars (M. Dakoff H. Batshev B. Vladsev) determined that 25-year-old European pine plantations (3-4 plants per plant) had more plantations Timber 1.6 times. H. Nikkijina (1952-1958) and A. Mlina (1953) argue that the growth of 2-8 per hole can be increased by a factor of 1 to 5 over the length of a single tree. Koralovim and Koelchevim (1977) received similar results. Two rows of standard plots were set after the I-214 poplar clones with a row spacing of 6 × 5 meters were planted. The first piece of spruce leave a sprout, the second