Effects of Some Factors on the Speed of Sap Movement in the Trunk of ×Populus albaglandulosa

×Populus albaglandulosa의 수액류속도(樹液流速度)

To obtain some informations for the water supply problems of ${\times}Populus$ albaglandulosa, a series of experiments on the speed of sap movement in the trunk of ${\times}P.$ albaglandulosa was carried out under the different tree age, soil moisture, time of day, and seasonal condition, by method of injecting of 1% Fuchsin solution. The results showed that the speed of sap movement was great in the conditions of low relative humidity, abundant leaves, and high temperature, but it was less influenced by different tree age and soil moisture.

은수원사시나무 1/1년생(年生), 1/2년생(年生) 및 7/8년생(年生)에 대(對)하여 간(幹)의 수액류속도(樹液流速度)을 관찰(觀察)하였던 바 유속(流速)은 수령간(樹令間)과 포지(圃地)의 토양수분(土壤水分)의 차이(借異)보다는 공중습도(空中濕度)와 착엽성(着葉性)에 가장 크게 영향을 받고 다음은 기온(氣溫)에 영향받고 있음을 볼 수 있었다.