自1948年10月20日起,苏联伟大的斯大林改造自然计划实施以来的光辉成就,已经完全证实了林带足以改变气候、保持水土、减少风砂危害、变沙漠为良田、扩大耕地面积、保证作物高额而稳定的产量,从而提高人民的生活水平,因此目前在全 国范围内(特别是沙荒地区)所进行的营造各种防护林带的工作正是我国改造自然的重耍措施之一。

Observations of shelter-belt effects were made by the writer in spring of 1955,in the sand dune region, western Hopei, where dcns}ly planted belts of cedartrees(Thuja Orientalis), with an average height of seven metres and a net of insu-fflation belts of black locust (Robinia Psendoacacia) with an average height of 4 metres wera established.