关键词: 甘肃地区, 油松, 种源选择

Abstract: A trial lasted 18 years on 45 Chinese pine provenances collected from its whole distribution areas had been done twice in its whole and partial distribution areas. Results indicated that the growth and adaptation difference among provenances were significant, and provenance has some interaction with site. The height growth of provenance showed significantly positive correlation with age and crown diameter. Provenances tested could be divided into 3 types: high, mediate and low growth according to the principal component analysis of 17 variables. Average tree height, diameter at breast height(DBH) and stock volume genetic gain of 3 optimum provenances, Huanglin, Luonan, Nanzhao, which had remarkable effects of increase in production, were 6.5%, 10.2% and 26.4%, respectively. Provenances in Shanxi and Henan which had good adaptation and high growth could be considered as major seed collecting ranges for Gansu. Provenances distributed in marginal areas were not suitable to adoption because of their low growth.

Key words: Gansu region, Pinus tabulaeformis Carr., Provenance selection