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Eco-physiological responses of Phragmites australis to different water depth in Momoge Wetland
DENG Chun-nuan1,2,3, ZHANG Guang-xin2, PAN Xiang-liang3
1. Key Lab of Plateau Lake Ecology & Global Change, College of Tourism and Geographic Science, Yunnan Normal University, Kunming 650500, China; 2. Key Laboratory of Wetland Ecology and Environment, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130012, China; 3. Key Lab.of Biogeography and Bioresource in Arid Land, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China
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Abstract  

By investigating of the reed ecological characteristics in field,and measuring the chlorophyll content and the maximum photosynthesis efficiency,the influence mechanism of water depth on the eco-physiological responses of reed in Momoge Wetland was analyzed.The results showed that there was a strong positive correlation between water depth and indices including the plant height, biomass,chlorophyll content and maximum photosynthesis efficiency.Along with the increase of water depth,these indices increased. There was a negative correlation between the water depth and coverage of reed.Along with the increase of water depth,the coverage decreased.The maximum photosynthesis efficiency in June and July was better than that in August.In August,it decreased,suggesting that the photosynthesis was retarded.Our results suggested that June and July are the key time for the growth of reed,and the water requirement should be guaranteed.The water depth of 15 cm is the minimum ecological water depth.The water depth of 35-45 cm is the optimum ecological water depth which can guarantee the best growth of reed.

Key wordsPhragmites australis      eco-physiological responses     
Received: 25 August 2012     
:  Q948.1  
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DENG Chun-nuan
ZHANG Guang-xin
PAN Xiang-liang
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DENG Chun-nuan,ZHANG Guang-xin,PAN Xiang-liang. Eco-physiological responses of Phragmites australis to different water depth in Momoge Wetland[J]. , 2012, 31(4): 352-356.
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