Effects of temperature and salinity on growth of G.tenuistipitata var.liui, U.pertusa, G.filicina and NH4-N uptake of G.tenuistxipitata var.liui

LIU Jing-wen; DONG Shuang-lin; MA Shen

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LIU Jing-wen, DONG Shuang-lin, MA Shen. Effects of temperature and salinity on growth of G.tenuistipitata var.liui, U.pertusa, G.filicina and NH4-N uptake of G.tenuistxipitata var.liui[J]. Haiyang Xuebao, 2001, 23(2): 109-116.

Citation:

LIU Jing-wen, DONG Shuang-lin, MA Shen. Effects of temperature and salinity on growth of G.tenuistipitata var.liui, U.pertusa, G.filicina and NH₄-N uptake of G.tenuistxipitata var.liui[J]. Haiyang Xuebao, 2001, 23(2): 109-116.

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Effects of temperature and salinity on growth of G.tenuistipitata var.liui, U.pertusa, G.filicina and NH₄-N uptake of G.tenuistxipitata var.liui

Aquaculture Research Laboratory of Ocean University of Qingdao, Qingdao 266003, China

Received Date: 1999-11-04
Rev Recd Date: 2000-05-11

Abstract

Abstract

The effect of temperature,salinity on the growth of G.tenuistipitata var.liui,U.pertusa,G.filicina and NH₄-N uptake by nitrogen-starved G.tenuistipitata var.liui is studied indoor.The results show that the maximal specific growth rate per day may reach as high as 8.66%,12.28%,2.24% at favorable temperature of 20~30℃,15~25℃,20~25℃ and salinity of 15~30,15~40,25~35 respectively.The addition of NaHCO₃ (2.5 mmol/dm³) stimulated growth,suggesting an inorganic carbon limitation in static cultures.Nearly all NH₄-N in the medium (60 μmol) are assimilated within 24 h at the combinations of 15℃,20℃,10 and 20,the uptake is slower at lower temperature (10℃) and higher salinity (40).The correlation models indicat that temperature and salinity are the major factors affecting growth and ammonium uptake.
- seaweeds,
- temperature,
- salinity,
- specific growth rate,
- NH₄-N uptake

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References(8)

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