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1974年,我们以桓仁县八里甸子乡大南沟村办林场为科研基点,开展了天然次生林综合经营效果的研究,现将11年来研究结果整理如下。一、自然概况林场位于东经124°51′,北纬41°13′,海拔500—1200m,年平均气温4.6℃,年降水量900mm,无霜期120天,土壤为山地棕色森林土,土层厚30—50cm,森林总而积为2673ha,总蓄积量为24.5万m~3。原有森林绝大部分为天然次生林,林相参差不齐,多代共存,林分产量低,质量差。
In 1974, we took Huanren County Pali Dianzi Township South Dagangcun do forest farm as a base for scientific research, carried out the study of the effect of natural secondary forest comprehensive management, now 11 years of research results are summarized below. First, the natural profile Forest farm is located east longitude 124 ° 51 ’, latitude 41 ° 13’, elevation 500-1200m, the annual average temperature of 4.6 ℃, the annual rainfall of 900mm, frost-free period of 120 days, the soil is mountain brown forest soil, soil thickness 30- 50cm, total forest area 2673ha, the total volume of 24.5 million m ~ 3. Most of the original forest is a natural secondary forest, forest uneven, multi-generation coexistence, low yield, poor quality.