CULTIVATION OF DUCKWEEDS IN SEPTAGE-LOADED EARTHEN PONDS
CULTIVATION OF DUCKWEEDS IN SEPTAGE-LOADED EARTHEN PONDS
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DOI：
10.1016/0960-8524(92)90195-4
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发表时间：
1992-01-01
影响因子：
11.4
通讯作者：
PACHARAPRAKITI, C
中科院分区：
文献类型：
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作者：
EDWARDS, P;HASSAN, MS;PACHARAPRAKITI, C
在200 m2的泥池中进行了浮萍（多根螺旋藻、小扁豆和灰尾草）的连续3次栽培试验。试验1和试验2的平均短期和长期（27天和182天）外推产量分别为21.4和9.2吨干吨/公顷/年。试验3第90 d，螺旋藻和莱姆纳的外推产量分别为20.4和10.9吨干wt/ha/年。Lemna的生长持续了160天，但被Wolffia污染导致产量下降。粗蛋白质含量平均为24.1%，干物质含量平均为28.0%。浮萍氮磷含量随池水氮磷浓度的增加而显著增加。藻华、虫害、风、低温、色素流失和浮萍腐烂对浮萍的生长和产量有显著影响。
A series of three experiments was conducted on the cultivation of duckweeds (Spirodela polyrrhiza, Lemna perpusilla, and Wolffia arrhiza) in 200 m2 septage-fed earthen ponds. Mean short- and long-term (27 and 182 days) extrapolated yields of Spirodela were 21.4 and 9.2 t dry wt/ha/year in Experiments 1 and 2, respectively. In the 90 days of Experiment 3, extrapolated yields of Spirodela and Lemna were 20.4 and 10.9 t dry wt/ha/year, respectively. Growth of Lemna continued for 160 days, but it was contaminated with Wolffia which reduced the yield. Mean crude protein contents of Spirodela and Lemna were 24.1 and 28.0% dry matter, respectively. Duckweed nitrogen and phosphorus contents increased significantly with an increase in nitrogen and phosphorus concentrations of pond water. Algal blooms, insect infestation, wind, low temperature, and loss of pigments and decay of duckweeds had noticeable effects on the growth and productivity of duckweeds.