“人的正确思想,只能从社会实践中来,只能从社会的生产斗争、阶级斗争和科学实验这三项实践中来。”在毛主席光辉哲学思想指引下,为培育杉木壮苗,几年来,我们对杉木播种苗的年生长发育过程作了些观察,并根据观察情况,把它划分为四个时期,即:出苗期,生长初期;速生期,生长后期。正确掌握不同生长发育时期的规律,合理地加强田间 “The correct thinking of man can only come from the practice of society and can only come from the three practices of social struggle for production, class struggle and scientific experiment.” Under the guidance of Chairman Mao’s glorious philosophy, in order to cultivate fir seedlings, In recent years, we have made some observations on the annual growth and development of Chinese fir seedlings. According to the observation, we divide them into four periods, ie, the emergence period, the early growth period, the fast growth period and the late growth period. Correctly grasp the law of different growth and development period, reasonable to strengthen the field