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目前我省尚有宜林荒山3000多万亩。为了迅速绿化荒山,进一步探讨适合山地造林的树种,遵照伟大领袖毛主席关于“要认真总结经验”的教导,我们先后于1972年和1974年两次去太行山区的阜平、曲阳、完县、唐县、邢台、内邱、临城等七个县的山区,对臭椿人工林和天然林进行了调查研究。共调查35块标准地,8株臭椿树根系。调查范围都属石质山地的一般山区和低山丘陵地区,海拔100—800米,基岩是片麻岩、石灰岩(包括硅质石灰岩)。境内土壤瘠薄,水
At present there are still more than 3,000 acres of barren mountains in our province. In order to quickly green the barren hills and further discuss the tree species suitable for afforestation in mountainous areas, and following the guidance of Chairman Mao on “seriously consummating experience”, we went to Fuping, Quyang and Duanxian counties in the Taihang Mountains twice in 1972 and 1974 respectively, Tang County, Xingtai, Neiqiu, Lincheng and other seven counties in the mountains, Ailanthus altissima plantations and natural forests were investigated. A total of 35 standard surveys, 8 stinking Ailanthus roots. The scope of the survey is in the mountainous and hilly areas of the stony mountainous area with an elevation of 100-800 meters. The bedrock is gneiss and limestone (including siliceous limestone). Infertile soil in the country, water