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Titolo:
Optimization of fertilization rate for maximizing periphyton production onartificial substrates and the implications for periphyton-based aquaculture
Autore:
Azim, ME; Wahab, MA; van Dam, AA; Beveridge, MCM; Milstein, A; Verdegem, MCJ;
Indirizzi:
Univ Wageningen & Res Ctr, Wageningen Inst Anim Sci, Fish Culture & Fisheries Grp, NL-6700 AH Wageningen, Netherlands Univ Wageningen & Res Ctr Wageningen Netherlands NL-6700 AH Netherlands Bangladesh Agr Univ, Dept Fisheries Management, Mymensingh 2202, Bangladesh Bangladesh Agr Univ Mymensingh Bangladesh 2202 mensingh 2202, Bangladesh Univ Stirling, Inst Aquaculture, Stirling FK9 4LA, Scotland Univ StirlingStirling Scotland FK9 4LA ture, Stirling FK9 4LA, Scotland Fish & Aquaculture Res Stn, IL-30802 MP Hof HaCarmel, Israel Fish & Aquaculture Res Stn MP Hof HaCarmel Israel IL-30802 armel, Israel
Titolo Testata:
AQUACULTURE RESEARCH
fascicolo: 9, volume: 32, anno: 2001,
pagine: 749 - 760
SICI:
1355-557X(200109)32:9<749:OOFRFM>2.0.ZU;2-F
Fonte:
ISI
Lingua:
ENG
Soggetto:
INTEGRATED FISH FARM; OREOCHROMIS-NILOTICUS; REEF; BIOMASS; PONDS; COMMUNITIES; EFFICIENCY; HERBIVORY; FREQUENCY; MANURE;
Keywords:
periphyton; fertilization; pond productivity; artificial substrates; aquaculture;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
44
Recensione:
Indirizzi per estratti:
Indirizzo: Azim, ME Univ Wageningen & Res Ctr, Wageningen Inst Anim Sci, Fish Culture& Fisheries Grp, POB 338, NL-6700 AH Wageningen, Netherlands Univ Wageningen & Res Ctr POB 338 Wageningen Netherlands NL-6700 AH
Citazione:
M.E. Azim et al., "Optimization of fertilization rate for maximizing periphyton production onartificial substrates and the implications for periphyton-based aquaculture", AQUAC RES, 32(9), 2001, pp. 749-760

Abstract

The effects of four rates of application of fertilizer, with cow manure (3000 kg ha(-1)), urea (100 (kg ha-1) and triple super phosphate (TSP) (100 kg ha(-1)) (treatment F)), treatment F x 0.5 (treatment 0.5F), treatment F x1.5 (treatment 1.5F) and treatment F x 2 (treatment 2F), on periphyton, plankton and water quality in tropical freshwater ponds were studied. The highest periphyton biomass in terms of dry matter (3.27 mg cm(-2) substrate), ash-free dry matter (2.06 mg cm(-2) substrate) and chlorophyll a (7.49 mug cm(-1) substrate) developed in treatment 1.5F. The ash content of periphyton was lower in treatment 1.5F (38% of dry matter) than in other treatments (57-66% of dry matter), Total ammonia and chlorophyll a of water increased with fertilization rate. Treatment 1.5F (cow manure, urea and TSP at rates of 4500, 150 and 150 kg ha(-1) respectively) appears to be the optimum, yielding high quantity and quality periphyton. By supplying a substrate area for periphyton equivalent to the pond surface, it was estimated that this level of fertilization could support a fish production of around 5000 kg ha(-1) y(-1), without recourse to supplementary food.

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Documento generato il 31/10/20 alle ore 00:26:14