Seasonal and Diurnal Water Relations of Selected Forest Species
作者： Richard G. Cline , Gaylon S. Campbell
DOI: 10.2307/1934826
关键词: Ecology 、 Western white pine 、 Experimental forest 、 Physocarpus 、 Water content 、 Alder 、 Osmotic pressure 、 Acer glabrum 、 Biology 、 Physocarpus malvaceus 、 Ecology, Evolution, Behavior and Systematics
摘要: Leaf diffusive conductance, leaf water potential, and osmotic potential measurements were made on one tree species three woody brush north south aspects in the Priest River Experimental Forest of northern Idaho. Douglas maple (Acer glabrum) western white pine (Pinus monticola) occurred both aspects. Sitka alder (Alnus sinuata) mallow ninebark (Physocarpus malvaceus) only aspects, respectively. Physocarpus aspect attained potentials near -30 bars daytime conductances (reciprocal resistance) 0.3 cm/s. The Pinus this site -25 0.06 Osmotic decreased to a minimum specific each deciduous as season progressed. Alnus Acer exhibited -16 with decreasing further -20 bars. maintained uniform po- tential between throughout year. conductance appeared be controlled during day by combination atmospheric demand, soil moisture availability, plant adaptation stress. Stomatal control was evident but not aspect.
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