关键词: 藜, 模拟干旱, 诱导, 抗旱性, 碳储量, 林龄, 喀斯特, 分配格局, 生物量

Abstract: To search after the approach of improving plant drought-resistance, the morphological and physiological indexes of drought-resistance of Chenopodium album were measured by five-years simulated drought inducement. The result shows that after simulated drought inducement, C.album could increase its leaf's typical drought-resistance characteristics: the blade thickness and succulence added, the specific leaf area, saturation osmotic potential and transpiration rate dropped, the osmotic regulation and water-holding capacities enhanced, and meanwhile, the critical saturation deficit value and transpiration efficiency increased. When the seeds with drought-resistance characterisitics, which were harvested after drought inducement, were planted in normal watered soil, the plants could keep the formed drought-resistance characteristics. The drought-resistance indexes were significant different(P<0.01) between induced and control plants when they were planted in critical drought-stressed soil. It is suggested that C.album is a species with variable drought-resistance, and its drought-resistance could be improved by drought training.

Key words: Chenopodium album, Simulated drought, Inducement, Drought-resistance, karst, biomass, carbon storage, allocation, stand age