| 不同控水条件下芦苇生长与光合特征研究 |
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| 引用本文： | 赵永全,何彤慧,夏贵菊,邓鑫,翟浩.不同控水条件下芦苇生长与光合特征研究[J].西北林学院学报,2015,30(1):69-74. |
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| 作者姓名： | 赵永全 何彤慧 夏贵菊 邓鑫 翟浩 |
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| 作者单位： | （1.宁夏大学 西北退化生态系统恢复与重建教育部重点实验室， 宁夏 银川 750021；2.宁夏湿地保护管理中心，宁夏 银川 750001） |
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| 摘 要： | 通过模拟栽培试验，设置了干湿交替，持续淹水和水分饱和3种芦苇生长的控水环境，对芦苇的生长和光合情况进行了观测和分析。结果表明:1）持续淹水处理组芦苇的株高、叶面积、展叶数及地上各构件生物量均显著（p＜0.05）大于与干湿交替和水分饱和处理组，分节数和株径也是如此，但是3个处理间差异不显著，表明持续稳定的淹水环境更加有益于芦苇的生长；2)干湿交替处理组芦苇的密度要显著大于持续淹水和水分饱和处理组，这是由于干湿交替使芦苇长期处于不稳定的水环境中，且一定程度受到干旱的胁迫，增加密度成为其种群内部的一种自我保护机制；3）同一时刻不同处理组芦苇光合作用存在差异，持续淹水处理芦苇的Pn、EVAP、Gs显著大于干湿交替和水分饱和处理组，干湿交替和水分饱和处理组无显著差异，而干湿交替处理组的Ci显著小于持续淹水和饱和水分处理组，但在8:00-14:00各处理组芦苇光合作用变化规律基本一致，且都有明显的“光合午休”。
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| 关 键 词： | 湿地 芦苇 光合作用 栽培试验 水分管理 |
Growth and Photosynthetic Characteristics of Phragmite saustralis under Different Water Control Conditions |
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| ZHAO Yong-quan,HE Tong-hui,XIA Gui-ju,DENG Xin,ZHAI Hao. Growth and Photosynthetic Characteristics of Phragmite saustralis under Different Water Control Conditions[J].Journal of Northwest Forestry University,2015,30(1):69-74. |
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| Authors: | ZHAO Yong-quan HE Tong-hui XIA Gui-ju DENG Xin ZHAI Hao |
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| Institution: | （1．Key Laboratory for Restoration and Regeneration of Degenerated Ecosystem in Northwest China of Ministry of Education， Ningxia University， Yinchuan， Ningxia 750021, China；2．Ningxia Wetland Protection Management Center ,Yinchuan, Ningxia 750001, China） |
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| Abstract: | In this paper, the growth and photosynthetic characteristics of Phragmite saustralis were observed and analyzed by the cultivation experiment, in which different water control conditions were set up, including alternate drying-wetting (ADW), permanent flooding (PF) and water saturation (WS) conditions. The results showed that: 1) the plant height, leaf area，leaf quantity and aboveground biomass in PW were significantly（p＜0.05） greater than in ADW and WS， so did their verse number and plant diameter, but the difference was not significant. Plant orphological indexes (except density) in all treatment groups were similar and had no significant differences. This is because PF not only can stabilize the water environment but also can offer the benefit water, fertilizer, air, heat and other conditions. These showed that a steady flooding environment is more favorable to the growth of P. saustralis. 2) The density of P. saustralis in ADW was significantly greater than in PF and WS. Due to in ADW was in long-term instable aquatic environment and vulnerable to drought or flooding, indicating that increasing density is self-protection mechanism of P. saustralis when it is vulnerable to drought or flooding. 3) In the same period, the photosynthetic characteristics of P. saustralis in different water control condition treatments were significantly different, Pn, EVAP and Gs were in an order of PF>WS>ADW，but there were no significant differences between ADW and WS. In 8:00-14:00, P. saustralis in all treatments basically had the same variation of photosynthesis and had obvious "photosynthetic noon break" phenomenon. |
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| Keywords: | wetland Phragmite saustralisPhragmite saustralis photosynthesis cultivation test water managemen |
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