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SCI论文目录 |
Kinetics of alkaline phosphatase in lake sediment associated with
cage culture of Oreochromis niloticus
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| 出 版 社： Aquaculture [Aquaculture]. |
| 发表时间：2001 |
| 台 站：
东湖湖泊生态系统试验站
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| 作 者：Yiyong, Z; Jianqiu, L; Yongqing, F; Min, Z |
| 点 击 率：2351 |
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| 关 键 字：null |
| 摘 要：null |
| 关 键 字(英文)：null |
摘 要(英文)： Variations in kinetics of alkaline phosphatase occurring in
different sites of sediment associated with cage culture of
Oreochromis niloticus in a shallow Chinese freshwater lake (Lake
Donghu) were described. In addition, the kinetic parameters of
each 2.5-cm stratum in the sediment from the surface down to 37.5
cm were analyzed. Horizontally, the V sub(max) values of alkaline
phosphatase in surface sediments increased markedly at sites
immediately under and adjacent to the cage that would be subjected
to the deposition of fish feces. Peak V sub(max) values in the top
5 cm of the sediment under the cage were also observed relative to
their deeper control. After a treatment where the fish feces were
added over 12 days, the sediment in deeper layer exhibited a
significantly higher V sub(max) value, thereby corroborating the
relationship between V sub(max) values of alkaline phosphatase and
fish feces in sediments. The fish feces exhibited a remarkable
alkaline phosphatase activity (APA). Thus, it is indeed a source
of the enzyme. Effects of the fish feces were dose- and
time-dependent. The V sub(max) values in sediments were always
stimulated, but the K sub(m) values showed much more variability.
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