<正>应用热扩散原理，采用1CT-2000TE自动测定系统，对岷江流域冷杉的树干液流及其主要环境因子进行了同步测定，分析了冷杉的树干液流动态变化规律。结果表明：冷杉的树干液流变化呈现明显的单峰曲线，液流速率的峰值一般出现在中午12或13时；影响冷杉树干液流大小的主要环境因子包括光合有效辐射、空气温度和空气相对湿度，但相关密切的是光合有效辐射。

Factors influencing rooting of tissue cultured shoots from cherry dwarf rootstock, Gisela5 and Gisela6 (Prunus cereasusXP, canescens) were studied. The result showed that the successful rooting system was closely related to the concentration of macronutrient of MS medium, auxin concentration and developing state of the explant. Jender shoots with smaller leaves and subcultured more than 30 times were cultured on the medium with 1/4 MS macronutrient and IBA 0. 5 mg/L for 15 d under dark condition. The highest rooting rate was gained from shoots of Gisela5 and Gisela6, which counted for 83.3%, 86.9% respectively.