杉木造林后,头2-3年常从根颈处长出大量萌蘖,影响主干生长。尤其我所地处右江干旱盆地,温度高,湿度低,风大,土壤瘠薄,造林后植株常由于缺水而死亡,成活的植株也常遭大风吹刮而造成主干歪斜或机械损伤,致使萌蘖丛生,影响主干生长。为了解决这个问题,我们遵照毛主席关于“一切经过试验”的教导,于1974年和1975年作了不同深栽防萌试验(见表1、2)。从试验结果看出,从苗木根颈部分开始埋土5-25厘米,随着栽植深度增加,萌蘖率逐步下降,高粗生长逐步提高;栽植深度超过30厘 After afforestation, the first 2-3 years from the root of the neck often grow a large number of sprout, affecting the growth of the trunk. In particular, I am located in the Youjiang arid basin, the temperature is high, low humidity, windy, infertile soil, plants often died of water shortage after afforestation, surviving plants are often blow by the wind caused by trunk skew or mechanical damage, resulting in Sprout bush, affecting the growth of the trunk. In order to solve this problem, we followed the teachings of Chairman Mao on “all tests” and conducted different deep-planting anti-sprouting tests in 1974 and 1975 (see Table 1 and 2). From the experimental results, it can be seen from the part of nursery stock that the root neck portion is buried 5-25 cm. With the increase of planting depth, the rate of tillering gradually decreases and the height of coarse growth gradually increases. The planting depth is more than 30%