使用植物生长刺激素是促进植物生长的一项重要措施。东北培育落叶松苗应用“九二○”激素,显著地促进了苗木生长。我省高山林区长期以来更新跟不上采伐的重要原因之一就是更新苗木生长缓慢。为了加速苗木生长,1972年我们在理县米亚罗川西林业局夹壁工区苗圃进行了激素处理苗木的试验。采用“九二○”植 The use of plant growth hormone is an important measure to promote plant growth. Northeast larch seedlings application of “920” hormone, significantly promote the growth of seedlings. One of the important reasons why the mountainous areas of our province have not kept up-to-date for a long time is to renew the slow growth of seedlings. In order to accelerate the growth of nursery stock, we conducted the hormone-treated seedling experiment in the nursery of the walled work area in Miyaluo Chuanxi Forestry Bureau in Li County in 1972. Use “nine two ○” planting