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河北省林业机构开展大规模的营造速生丰产林的试验研究工作。从试验结果看出采用综合措施对林木快速生长的作用是非常大的。例如,河北林研所唐柳丰产林,到59年9月26日为止,一年生树高达3.08米,超过一般造林284%;胸径2.53厘米,超过原来的243.8%。河北农大及其园林化分枝的毛白杨,一年生树高达4.25——4.54米,胸径3.33—3.78厘米。不少单位还进行了单项技术措施对比试
Forestry institutions in Hebei Province to carry out large-scale experimental study of fast-growing and high-yielding forests. From the experimental results, it can be seen that the effect of comprehensive measures on rapid forest growth is very large. For example, the forest research institute of Tangliu yield forest in Hebei Province, up to September 26, 59, annual tree up to 3.08 meters, more than the general afforestation 284%; diameter of 2.53 cm, more than the original 243.8%. Hebei Agricultural University and its branches of poplar, annual tree up to 4.25--4.54 meters, diameter 3.33-3.78 cm. Many units also conducted a comparison of individual technical measures