Effect
of fertilizer addition on water quality and fingerling production of loach (Misgurnus
anguillicaudatus) in natural outdoor ponds
Young Sik Lee1*,
Kwang Seog Kim1, Sang-Gu Lim1, Jae Hyun Im1,
Hyung-Gyun Han1, Ho Young Soh2 and Cheong-Jo Cheong3
1Inland
Aquaculture Research Center, National Fisheries Research and Development
Institute, Changwon, Kyungnam 645-806, Korea
2Faculty of Marine
Technology, Chonnam National University, Yeosu, Jeonnam 550-749, Korea
3Department of
Environmental Engineering, Sunchon National University Suncheon, Jeonnam
540-950, Korea
*Corresponding
Author?s Email : namdu@korea.kr
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Publication Data
Paper received:
16 June 2013
Revised received:
21 February 2014
Accepted:
15 May 2014
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Abstract
The
present study examined the effect of fertilizer addition on water quality and
loach (Misgurnus anguillicaudatus) fry growth in outdoor ponds for the
promotion of loach culture in rice paddy fields. Three ponds received the
following treatments: fertilizer with no loach (6-1), fertilizer with loach
(6-4), and no fertilizer and no loach (6-2). Concentration of NH4+-N
and PO43--P were highest in ponds that received
fertilizer. Chl. a concentration was two times higher in ponds 6-1 and -4
than in pond 6-2. Furthermore, Chl. a concentration in pond 6-4 was
78% lower than that in pond 6-1. The density of diatoms and green algae was
two times higher in ponds 6-1 and -4 than in pond 6-2, and the average
density of diatoms was lower in pond 6-4 than in pond 6-1. Loach cultured
with fertilizer in this study were slightly longer than the Chinese loach
cultured in an indoor fiber-reinforced plastic tank.
Key
words
Fingerling
production, Loach, Misgurnus anguillicaudatus, Natural outdoor pond,
Water quality
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