| Transpiration water is the mainly form of plant,s consuming water. Through Studying on Larix principis-rupprechtii in the north of Liu Pan Shan, adopting advanced SL-F technology mensurate water consumption characteristics of Larix principis-rupprechtii ring. And analyze the relation between transpiration rate and the environmental factors. The result showed that: The transpiration rate of Larix principis-rupprechtii take on obvious change law of day and month; In the different weather condition, the transpiration rate of trees was higher at sunny days than at cloudy days, and at the cloudy days was higher the that at the rainy days; Through analyzing the meteoric factors, elicit regressive equation. Annually average water consumptions of individual tree and whole shelter belt were provided basic data for planning water use of this region. Design and simulate fuzzy transpiration model based on Matlab. |