关键词: 黄柳, 气孔导度, 水分状况

Abstract: Stomatal conduction of Salix gordejevii is tending to decrease after 8 am. During the diurnal measurement the value of stomatal conduction of lower epidermis is higher than that of the upper. The stomata of lower epidermis is highly sensitive to the environmental condition. The value of stomatal conduction and the cell water parameter of Salix gordejevii is different during growth season. The drought resistance ability of Salix gordejevii is different at different parts of sand dune and different seasons. The shrub has the highest drought resistance in May and June. Cell water pressure potential is always positive number in humid July, which means that although the cell water pressure potential of Salix gordejevii changes with environmental condition and stomatal regulation, the growth of plant does not be affected.

Key words: Salix gordejevii, Stomatal conduction, Water state