科研成果
| 论文编号: | DOI 10.1007/s11056-008-9081-z |
| 第一作者所在部门: | 生态研究中心 |
| 论文题目: | Growth, biomass partitioning, and water-use efficiency of a leguminous shrub(Bauhinia faberi var. microphylla) in response to various water availabilities |
| 作者: | 李芳兰 |
| 全部作者: | Fanglan,Li Weikai Bao,Ning Wu,Chen You |
| 论文出处: | |
| 刊物名称: | New Forests |
| 年: | 2008 |
| 卷: | 36 |
| 期: | 1 |
| 页: | 53-65 |
| 联系作者: | 包维楷 |
| 收录类别: | |
| 影响因子: | 0.845 |
| 摘要 : | Responses of the endemic leguminous shrub Bauhinia faberi var. microphylla, to various soil water supply regimes were studied in order to assess water stress tolerance of seedlings. Two-month-old seedlings were grown under water supply regimes of 100, 80, 60, 40, and 20% water field capacity (FC), respectively, in a temperature and light-controlled greenhouse. Plant height and leaf number were measured monthly over a 4-month period, while water use (WU), water-use efficiency (WUE), leaf relative water content (RWC), biomass production and its partitioning were recorded at the end of the experiment. Seedlings exhibited the greatest biomass production, height, basal diameter, branch number, leaf number, and leaf area when soil content was at 100% FC, and slightly declined at 80% FC. These parameters declined significantly under 60% FC water supply, and severely reduced under 40 and 20% FC. RWC, WU and WUE decreased, while the ratio of root mass to stem mass (R:S) increased in response to decreasing water supply. Water stress caused leaf shedding, but not plant death. The results demonstrated that B. faberi var. microphylla seedlings could tolerate drought by reducing branching and leaf area while maintaining a high R:S ratio. However, low dry mass and WUE at 40 and 20% FC suggested that the seedlings did not produce significant biomass under prolonged severe water deficit. Therefore, before introducing B. faberi var. microphylla in vegetation restoration efforts, water supply above 40% FC is recommended for seedlings to maintain growth. |
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