在毛主席“备战、备荒、为人民”的伟大战略方针指引下,我省林业战线上广大革命职工和革命干部,近几年来狠抓了次生林抚育采伐工作,既培育了森林资源,又拿出部分木材,支援了国家建设。云杉林在青海省分布最为广泛,其森林面积约占全省森林总面积的40％,蓄积量约占全省森林总蓄积量的74％,历来均为最主要的采伐用材对象。为了研究云杉中幼林生长发育的规律和不同抚育采伐强度的效果,我们于1964年设置了固定标准地。遵照毛主 Guided by the great strategic principle of “preparing and preparing for the poor and serving the people” of Chairman Mao, the vast number of revolutionary workers and revolutionary cadres on the forestry front in our province have paid close attention to the harvesting of secondary forest in recent years. They not only nurtured the forest resources, Part of timber, supported the building of the country. Spruce forest in Qinghai Province is the most widely distributed, the forest area accounts for about 40% of the total area of ​​the province’s forest, the accumulation of about the province’s total forest volume of 74%, has always been the main timber for logging purposes. In order to study the law of growth and development of young and middle-aged spruce and the effect of different deforestation strength, we set a fixed standard in 1964. Follow the owner