1948年在草河口山地利用6年生大苗营造了红松人工林(解放林),造林密度每公顷为4400株。1957年林木开始郁闭,至1962年林木分化已明显,枯死木占3.0—6.5%。1962年春季在该林内进行了抚育采伐 In 1948, 6-year-old seedlings were used in the grasshead estuary to create Pinus koraiensis plantation (emancipation forest) with a density of 4,400 hectares per hectare. In 1957, the trees began to be closed, and by 1962, the differentiation of trees had become obvious. The proportion of dead wood accounted for 3.0-6.5%. In the spring of 1962 there was felling and logging in the forest