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川西亚高山暗针叶林区更新苗高生长规律决定于树种的遗传潜势、季节和海拨生境。更新苗高生长每年5月中旬以后开始,直到秋初停止,苗高生长随季节变化呈“慢—快—慢”的趋势。测定了3种更新苗的高生长温度3基点,鳞皮冷杉(Abies Squamata)高生长的温度最低点最低,其次是川西云杉(picea batfouriana)、鳞皮云杉(P.retroflexa)最高。3种更新苗高生长的最高温度都为13.1℃.最适温度范围都在10—11.6℃左右。 上述3种更新苗连年高生长量是川西云杉>鳞皮云杉>鳞皮冷杉,5年生苗木更新栽植后第一至第四年连年高生长量呈高→低→高的曲线变化。苗木更新第二年出现缓苗现象。 不同生境的更新苗其地上部分的生长有明显差异.其中纬度较低的地带更新苗高生长随海拨高度的变化差异大于纬度较高地带的更新苗。
The growth pattern of renewed seedling height in dark coniferous forest in sub-alpine region of western Sichuan depends on the genetic potential of seeding species, seasons and seagrass habitat. The growth of seedling height was started after mid-May every year, and stopped until the fall of early autumn. The growth of seedling height showed a tendency of “slow-fast-slow” with the change of seasons. The highest growth temperature of the three newly planted seedlings was measured at 3 basis points. Abies Squamata had the lowest growth temperature, followed by picea batfouriana and P. retroflexa. The maximum temperature of three kinds of renewal seedling height was 13.1 ℃ .The optimum temperature range was about 10-11.6 ℃. The annual increment of annual growth of the three newly-growing seedlings was the change of the curve of high → low → high in the first year to the fourth year after the 5-year-old seedlings were replanted. Emergence of seedling emergence Huanmiao phenomenon the second year. The growth of shoots in different habitats was obviously different, and the change of altitude in the areas with lower latitudes was more obvious than that in higher latitudes.