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| 不同土壤水分条件对真桦幼苗形态特征、生物量及光合生理特征的影响 | |
| 引用本文： | 王晓冬,叶生欣,沈海龙,李长海.不同土壤水分条件对真桦幼苗形态特征、生物量及光合生理特征的影响[J].东北林业大学学报,2008,36(5):22-24. |
| 作者姓名： | 王晓冬 叶生欣 沈海龙 李长海 |
| 作者单位： | 1. 东北林业大学,哈尔滨,150040 2. 黑龙江省林业勘察设计院 3. 黑龙江省森林植物园 |
| 基金项目： | 引进国际先进农业科技计划(948计划) |
| 摘 要： | 通过人工控水土培方法,研究了不同水分条件下真桦幼苗的生长、形态、生物量和生理特征的变化规律。结果表明,生长在干旱土壤条件下的植株,其净光合速率、气孔导度和蒸腾速率分别比生长在湿润条件下降低62.5%、85.9%和76.6%,而水分利用效率提高了60.2%;生长季末,低土壤含水量环境中的真桦幼苗植株矮小,速生期和生长周期相对变短,幼苗的单株总生物量降低,比叶面积降低,根茎比提高,细根与总根重的比率提高。真桦幼苗对水分亏缺较为敏感,应尽量避开干旱条件。 |
| 关 键 词： | 真桦幼苗 形态 特征 土壤 水分 |
| 修稿时间： | 2007年11月12 |
Effect of Soft Water Regimes on Morphological characteristics, Biomass and Photosynthetic and Physiological Characters of Betula maximowicziana Seedlings |
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| Wang Xiaodong,Ye Shengxin,Shen Hailong,Li Changhai.Effect of Soft Water Regimes on Morphological characteristics, Biomass and Photosynthetic and Physiological Characters of Betula maximowicziana Seedlings[J].Journal of Northeast Forestry University,2008,36(5):22-24. | |
| Authors: | Wang Xiaodong Ye Shengxin Shen Hailong Li Changhai |
| Abstract: | An experiment was conducted to study the height growth, morphological characteristics, biomass, and photosynthetic and physiological characters of the seedlings of Betula maximowicziana Regel under three artificially controlled soil water gradients. Results indicated that the net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr) of B. maximowicziana seedlings under dry conditions were 62.5%, 85.9% and 76.6% lower than those under wet conditions, respectively, but the water use efficiency of seedlings increased by 60.2%. The seedlings under low soil water conditions showed smaller shoot, relatively shorter annual growth period, lower total biomass, lower specific leaf area as well as higher ratios of root to shoot and fine root (<2mm) to total root. B. maximowicziana seedlings are sensitive to soil moisture content, so dry condition should be avoided during B. maximowicziana seedling cultivation. |
| Keywords: | Betula maximowicziana seedlings Morphology Characteristics Soil Moisture |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |