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在四川省泸州市泸县、宜宾市珙县、广元市元坝区进行了湿加松Pee×Pch (Pinuselliottiivar .elliottii×P .caribaeavar .hondurensis)F2 子代育苗试验。结果表明 :3个地点的平均苗高分别为 33 12cm、2 5 4 2cm、2 1 0 3cm ,差异达极显著水平 ,呈现随海拔和主要气象因子的渐变变异趋势 ,海拔越低、年均温和≥ 10℃积温越高、年降水量越大、无霜期越长 ,平均苗高越大且变异系数越小。初步认为湿加松在四川引种的适宜条件为 :海拔 5 0 0m左右 ,年均温≥ 17 0℃ ,≥ 10℃积温 5 6 0 0℃以上 ,年降水量 115 0mm左右 ,无霜期≥ 32 0d。
F2 progenies of Pee × Pch (Pinuselliottiivar. Elliottii × P .caribaeavar. Hondurensis) F2 were inoculated in Lu County, Luzhou City, Yixian City, Yibin City and Yuanba District, Guangyuan City, Sichuan Province. The results showed that the average seedling height of the three sites were 33 12cm, 2542cm and 21 03cm, respectively. The differences were highly significant, showing the trend of gradual variation with altitude and the main meteorological factors. The lower elevation, the average annual temperature The higher the accumulated temperature is, the higher the annual temperature is, the longer the frost-free period is, the larger the average height is and the smaller the coefficient of variation is. It is preliminarily believed that the suitable conditions for the introduction of wet Jiaosong in Sichuan are as follows: the elevation is about 500 m, the average annual temperature is 1700C, the accumulated temperature is ≥ 10 ° C, and the annual precipitation is about 115 0 mm and the frost-free period is more than 320 days.