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建国以来,延边各地营造了大面积的红松人工林,大多数已郁闭成林。但近年来发生了较严重的枯死现象,据不完全统计,总发生面积达四万九千多亩,枯死率一般达10—25％,有的林分枯死率竟达60—70％,成为营林工作不可忽视的一个重要问题。1980年以来,我们对红松人工幼林枯死原因进行了较广泛的野外调查和室内分析。综合两年的工作,对延边地区红松人工幼林枯死的原因,提出我们的看法如下:
Since the founding of the People’s Republic of China, a large area of Pinus koraiensis plantations has been built around Yanbian, and most of them have closed forests. However, in recent years, a serious withering phenomenon has taken place. According to incomplete statistics, the total area has reached 49,000 mu, the rate of withered death is usually 10-25%, and some cases of withered trees are 60-70% An important issue that can not be neglected in forest management. Since 1980, we conducted a more extensive field investigation and laboratory analysis of the causes of the death of Pinus koraiensis plantations. Based on the two years of work, we put forward our opinions on the causes of the death of Korean pine young plantations in Yanbian area as follows: