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河北省油松天然林主要分布于冀东北山地和冀西山地的中海拔地区。为了提高油松种子遗传品质,很有必要在天然林中选择优良林分作为采种林分,重点保护,并进一步选择其中适合条件的改建成母树林。 1983年我们参加了“油松天然优良林分选择、改良和促进结实技术的研究”国家攻关协作组,对河北省重点分布区的油松天然林进行了调查和研究,提出了本省油松天然林优良林分的选择标准和利用优良林分改建母树林的林分标准。
The natural forests of Pinus tabulaeformis in Hebei province are mainly distributed in the middle-altitude area of Hebei northeast and western Hebei mountains. In order to improve the genetic quality of Pinus tabulaeformis seeds, it is necessary to select the good stands in the natural forest as the seed-collection stand, and focus on the protection, and further select the appropriate conditions into the parent woods. In 1983, we took part in the National Key Research Team on the Selection, Improvement and Promotion of Robust Technology of Pinus tabulaeformis Natural Fine Stands, and conducted a survey and research on the natural Pinus tabulaeformis forest in the key distribution areas of Hebei Province. Selection Criteria for Forest Excellent Stands and Forest Stand Standard for Rebuilding Primary Forest with Superior Stands.