关键词: 湿加松, 杂种, 育苗, 变异, 引种

Abstract: Seedlings of F₂ from Pee×Pch hybrid pine(Pinus elliottii var. elliottii×P. caribaea var. hondurensis) have been raised in counties Luxian, Gongxian and Yuanba of the Province Sichuan. The results show that difference in average heights of one-year old seedlings between the 3 counties is significant at a level< 0.01 with 33.12 cm in Luxian >25.42 cm in Gongxian >21.03 cm in Yuanba, exhibiting clonal variation with altitudes and important meteorological data. The seedlings' average height is the taller and its coefficient of variation the lesser, the lower the altitude is, also the higher both the annual average temperature and the annual accumulated temperature ≥10℃, the more the annual rainfall, and the longer the frost-free period. It is suggested that the Pee×Pch hybrid pine should be suitable to Sichuan's sites where altitudes are about 500 m high, annual average temperatures above 17.0℃, annual accumulated temperatures ≥10℃ above 5600℃, annual rainfall about 1150 mm, and frost-free period above 320 days.

Key words: Slash×Caribbean Pine, hybrid, seedling-raising, variation, introduction