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华山松(Pinus armaodi Franek)是我国华北、西南地区主要造林树种之一,它分布范围广,界于北纬23°30′-36°30′,东径88°50′-113°之间,具有适应性强,生长快,早期速生等特点。宜昌地区在海拔1400米以上的山地,有华山松小片林或单株的天然分布,并多见于山脊、陡坡上与油松或其它阔叶树组成混交林。五十年代末、六十年代初,华山松亦是我省西部山区的主要造林树种。我场1958年以来共营造华山松人工林2. 4万亩。据调查22年生,平均树高11. 2米,胸径14. 9厘米,最粗达32. 0厘米,单株材积平均0. 086立方米,已进行两次抚育间伐利用。但由于当时盲目大量调进外地种子,地理环境各异,其群体间(?)群体
Pinus armandii (Pinus armaodi Franek) is one of the main afforestation species in North China and Southwest China. It distributes widely in the range of 23 ° 30’-36 ° 30 ’north latitude and 88 ° 50’-113 ° east longitude with Adaptable, fast growth, early fast-growing and so on. Yichang area at an altitude of 1400 meters above the mountain, there Huashan pine small forest or single plant natural distribution, and more common in ridges, steep slopes and pine or other hardwood mixed forest. In the late 1950s and early 1960s, Huashan pine was also the main afforestation species in the western mountainous areas of our province. My field since 1958 to create Huashan pine plantation 2. 4 million mu. According to a survey of 22-year-old, the average height of 11.2 meters, diameter at breast height of 14.9 cm, the maximum diameter of 32.0 cm, an average of 0. 086 cubic meters per plant volume, have been used twice between tending. However, because at that time blindly massively transferred foreign seeds and their geographical environment were different, their population (?) Groups