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通过定点封山育林15个县的实地调查和349株样木生长量测定,与1984年一般林分相比,其平均生长率:松增长0.64%、杉增长1.93%、阔叶树增长0.74%,每亩平均林木株数从16株提高到23.2株。
The field survey and 349 samples of wood-growing in 15 counties were conducted. The average growth rate was 0.64% for pine, 1.93% for fir and 0.74% for broad-leaved trees, The number of trees increased from 16 to 23.2.