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小兴安岭林区在皆伐红松更新迹地和苗圃未防寒的红松苗床上,3—4月间经常发生枯梢现象,俗称“带红帽”。轻者当年针叶枯落,甚至顶枝枯死由侧枝萌发而成丛状,严重影响幼苗生长;重者则整株死亡。这是红松育苗和人工更新中普遍存在的问题,已引起广大林业工作者的重视。但到目前为止,枯梢原因还没有明确的结论,中国科学院林业土壤研究所和黑龙江省林业科学院丽林、江山娇实验林场于1965—1967、1974—1975、1979—1980年相继进行红松幼苗枯梢试验研究,现将研究结果概述如下。
Xiaoxing’anling forest areas in the clearing of red pine cuttings and nursery not cold-proof pine seedlings bed, 3-4 months often withered phenomenon, commonly known as “with Red Hat.” Light year needle litter, or even dead top branches from the lateral branch germination and plexus, seriously affecting the seedling growth; severe cases, the whole plant died. This is a common problem in seedling breeding and artificial regeneration, which has aroused the attention of the majority of forestry workers. However, so far, there is no clear conclusion as to the reason for the disease. The Chinese Academy of Forestry Institute of Forestry and the Heilongjiang Academy of Forestry, Lilin and Jiangshan Jiao Experimental Forest Farm successively conducted the tests of Pinus koraiensis seedlings from 1965 to 1967, 1974 to 1975 and 1979 to 1980, Shoot test study, the results of the study are summarized below.