近些年来,我场先后营造杉木林7000余亩,目前大多生长较好,但也有不少林分,由于选地不当及管理措施没有跟上,生长不良.为了促进幼龄杉木迅速成林成材,从1979—1980年,我们在本场进行了应用不同浓度萘乙酸促进杉木生长的初步试验,取得了一定的效果.现整理如下:一、材料与方法药剂来源:由河北省邯郸市农药厂供给.使用工具:两米直尺、游标卡尺、兽用注射器及卫生喷雾器等. In recent years, I have been to create more than 7,000 acres of fir plantation, and at present most of them are growing well, but there are also a lot of stands due to improper selection and management practices that have not kept pace with the growth. In order to promote the rapid succession of young Chinese fir plants, From 1979 to 1980, we conducted preliminary experiments on the application of naphthalene acetic acid in different concentrations to promote the growth of Chinese fir, and achieved some results. Now, we have organized the following: I. Materials and Methods Pharmacy Source: Supplied by Handan Pesticide Factory in Hebei Province Use tools: two meters ruler, vernier caliper, veterinary syringe and hygienic sprayer.