Abstract:

Water transport at the root/soil interface of 1 year old Pinus sylvestris Linn. var. sylvestriformis (Takenouchi) Cheng et C. D. Chu seedlings under CO2 doubling was studied by measuring soil electric conductance to survey soil water profiles and comparing it with root distribution surveyed by soil coring and root harvesting in Changbai Mountain in 1999. The results were: (1) The profiles of soil water content were adjusted by root activity. The water content of the soil layer with abundant roots was higher. (2) When CO2 concentration was doubled, water transport was more active at the root/soil interface and the roots were distributed into deeper layer. It was shown in this work that the method of measuring electric conductance is an inexpensive, non-destructive and relatively sensitive way for underground water transport process.

C0₂倍增对长白赤松幼苗根-土界面水分运输过程的影响
韩士杰 张军辉 周玉梅 王琛瑞 邹春静
（中国科学院陆地生态过程开放实验室，沈阳110015）

Key words: CO2 doubling, Pinus sylvestris var. sylvestriformis seedlings, root/soil interface, water transport, electric conductance of soil