Cultivation of Lemna gibba under desert conditions. I: Twelve months of continuous cultivation in open ponds |
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| Institution: | 1. Key Lab of Marine Environment and Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China;2. School of Environmental Science and Engineering, Qingdao University, Qingdao 266071, China;3. Shandong Provincial Key Laboratory of Marine Environment and Geological Engineering, Qingdao 266100, China;1. Department of Environment and Energy, Sejong University, 98 Gunja-Dong, Gwangjin-Gu, Seoul 143-747, Republic of Korea;2. School of Civil, Environmental & Architectural Engineering, Korea University, 145, Anam-ro, Sungbuk-ku, Seoul 136-701, Republic of Korea;3. Energy Lab, Environment Group, Samsung Advanced Institute of Technology, 130 Samsung-ro, Yeongtong-gu, Suwon-si, Gyeonggi-do 443-803, Republic of Korea;4. Department of Environmental Engineering & Program in Environmental Technology and Policy, Korea University, Sejong 339-700, Republic of Korea;5. Department of Civil and Environmental Engineering, Sejong University, 98 Gunja-Dong, Gwangjin-Gu, Seoul 143-747, Republic of Korea;1. Department of Medical Technology, Xiamen Medical College, Xiamen, 361023 Fujian, China;2. Application Technique Engineering Center of Natural Cosmeceuticals, College of Fujian Province, Xiamen Medical College, Xiamen, 361023 Fujian, China;3. Department of Biological Science and Technology, China University of Science and Technology, Taipei 115, Taiwan;4. Bioresource Collection and Research Center, Food Industry Research and Development Institute, HsinChu 300, Taiwan;5. Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung 40227, Taiwan;6. Innovation and Development Center of Sustainable Agriculture, National Chung Hsing University, Taichung 40227, Taiwan;1. Singapore-MIT Alliance, Singapore;2. School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Ave., 639798 Singapore;3. Department of Chemical Engineering, Waterloo Institute for Nanotechnology, University of Waterloo, 200 University Ave. W, Waterloo, Ontario, Canada N2L 3G1;4. Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA |
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| Abstract: | Duckweed, Lemna gibba, was grown in 12 m2 shallow ponds in the Negev desert, during 12 months of continuous cultivation, beginning April 1984. Average monthly growth rates varied with the season of the year. The lowest daily yield, 2·6±0·4 g dry weight m−2 day−1, was obtained during January. Highest daily yields, 7·9±2·6 g dry weight m−2 day−1 and 7·0±1·2 g dry weight m−2 day−1, were obtained during September and May. A 35% decline of the yield was seen during midsummer (July), 4·8±1·2 g dry weight m−2 day−1. The average rate for the year was 5·15±1·7 g dry weight m−2 day−1. The protein content of the plants ranged from 30 to 38% per unit dry weight.Growth performance is discussed in relation to the prevailing climatic conditions. |
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