An assessment of the role of buffalo manure for pond culture of tilapia. III. Limiting factors

Shevgoor, Latha; Knud-Hansen, Christopher F.; Edwards, Peter

doi:10.1016/0044-8486(94)90252-6

Cited by 27 publications

(11 citation statements)

References 8 publications

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“…Fertilization with fresh cattle manure and inorganic fertilizers in the current study led to lower levels of phytoplankton biomass and corresponding fish yields than that of ponds in another study receiving isonitrogenous levels of duck manure (AIT 1986). This is probably explained by the negative impact of tannin contained in ruminant manure on phytoplankton growth (Shevgoor et al 1994). Levels of VSS <50% of TSS suggested that food was limited in all treatment ponds; suspended solids were composed mainly of silt, either stirred up by the fish from the pond bottom or washed from the pond dike by rain.…”

Section: Monoculturementioning

confidence: 57%

Comparison of Tilapia Monoculture and Carp Polyculture in Fertilized Earthen Ponds

Hassan

Edwards

Little

1997

J World Aquaculture Soc

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A comparison of a monoculture of Nile tilapia Oreochromis niloticus and a polyculture of carps (silver carp Hypophthalmichthys molitrix; rohu Labeo rohita; and mrigal Cirrhinus mrigala; ratio 4:3:3) was carried out in 200‐m2 earthen ponds fertilized with cattle manure and supplemented with inorganic fertilizer at 3‐kg nitrogen and 1.5‐kg phosphorus/ha per day. A control treatment of a tilapia monoculture without fertilizer inputs was included to assess the effect of pond basal fertility. Net yields of 23.5 kg/pond per 112 d (3.8 t/ha per 1 yr) in the tilapia monoculture and 19.2 kg/pond per 112 d (3.1 t/ha per yr) in the carp polyculture were not significantly different; net yields from unfertilized tilapia monoculture ponds were negative. In the carp polyculture, silver carp was the dominant species at harvest contributing 73% of the total net fish production compared to 9% and 19% by rohu and mrigal, respectively. Water quality data suggested that tilapia yields could have been further improved by increasing fertilization rate but that critical dissolved oxygen concentration constrained this option for carp polyculture.

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Section: Monoculturementioning

confidence: 57%

Comparison of Tilapia Monoculture and Carp Polyculture in Fertilized Earthen Ponds

Hassan

Edwards

Little

1997

J World Aquaculture Soc

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“…In addition, the decomposition of dead algae during summer months can cause low oxygen that may cause fish kills during extended periods of cloudy weather. Understanding pond ecology promotes knowledgeable choices of appropriate fertilizers to both optimize fertilization efficiency and minimize unwanted environmental impacts (Knud‐Hansen & Pautong 1993; Shevgoor, Knud‐Hansen & Edwards 1994).…”

Section: Introductionmentioning

confidence: 99%

Effects of lining and drying on the chemical composition of sediments and influence of organic carbon on carp growth in aquaculture ponds

Kassila¹

2003

Aquaculture Research

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Chemical characteristics and P‐fractionation of sediments from the Deroua fish culture farm (Beni Mellal, Morocco) were analysed in 1998 and 1999. The high concentrations of organic N and organic C in the sediments reflect the high productivity of phytoplankton in the lined ponds. Despite the fact that these ponds were not frequently fertilized, inorganic P was more important in the sediments. The P released from CaCO3≈P was the principal source of P for phytoplankton. The mineralization rate of organic C during the drying period was about 87 µg g−1 day−1 in the sediments. The mineralization rate of organic N seems to be less, compared with organic C. The experimental results indicate that the C:N ratio and texture of sediments could explain the immobilization of organic N. All forms of P remained almost unchanged after the drying period except for Fe(OOH)≈P. The ferric (oxy) hydroxides protect NaOHext‐P from the bacterial lyses and stabilize therefore their concentration. The inorganic P represented about 88% of Total P in the sediments and may influence the mineralization rate of organic P. The growth of silver carp were reduced in presence of high concentrations of organic C in sediments (> 30 mg/g). Compounds toxic to fish such as Fe2+, Mn2+, H2S and CH4 were then released in the water column.

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“…In the pond conditions of this experiment about 43% of the nutrients were released from the different manures by day six. For buffalo manure, 90% of the total nitrogen was released within three days (Shevgoor et al 1994). The oxidation of ammonia requires oxygen in the water, for this reason during the initial period of manure application, low levels of nitrate were recorded.…”

Section: Discussionmentioning

confidence: 99%

“…According to Ullah (1989), duck manure released the most soluble nitrogen (N) and phosphorus (P) to pond water within four days of manure application. In the case of buffalo manure, 90% of the total Kjeldahl nitrogen was released as dissolved inorganic nitrogen (DIN) within three days, and release of dissolved inorganic phosphorus (DIP) reached a maximum concentration on day four, equivalent to 35% of the initial total P contained in the manure (Shevgoor et al 1994). Knud-Hansen et al (1991) indicated that approximately two-thirds of the DIN in chicken manure was leached into pond water within the first two days and greater than 90% of the leachate was in the form of ammonia.…”

Section: Introductionmentioning

confidence: 99%

The Nutrient Profile in Organic Fertilizers

Kumar

Luu

et al. 2005

Journal of Applied Aquaculture

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In order to manage nitrogen (N) and phosphorous (P) through organic fertilization in aquaculture ponds, it is important to understand the nutrient profile of different animal manures at various concentrations and the respective biological response. The rate of nutrient released from animal manure over time is a key factor in deciding the frequency and quantity of manure required to fertilize ponds. This study was conducted to elucidate the nutrient profile, and its efficiency in terms of primary productivity, of pig, cow, and buffalo manure, at different N:P concentrations in tank. Appropriate concentrations were maintained by using the minimum amount of inorganic fertilizer supplement. This paper also investigated the impact of lime-treated manure, a traditional practice in Vietnam, on primary production (phytoplankton abundance). The average nitrogen (N) and phosphorus (P) content was higher in pig manure (0.54% N and 0.173% P) compared to cow (0.31% N and 0.028% P) and buffalo (0.34% N and 0.013% P). The ammonia release rate increased with increase in N concentration. The average ammonia release rate (all concentrations, 1-2 ppm N) in the pig manure treatment was significantly higher than cow and buffalo manure treatments. Cow and buffalo manures were found to be similar in terms of ammonia re-Please note that this electronic prepublication galley may contain typographical errors and may be missing artwork, such as charts, photographs, etc. Pagination in this version will differ from the published version.

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An assessment of the role of buffalo manure for pond culture of tilapia. III. Limiting factors

Cited by 27 publications

References 8 publications

Comparison of Tilapia Monoculture and Carp Polyculture in Fertilized Earthen Ponds

Comparison of Tilapia Monoculture and Carp Polyculture in Fertilized Earthen Ponds

Effects of lining and drying on the chemical composition of sediments and influence of organic carbon on carp growth in aquaculture ponds

The Nutrient Profile in Organic Fertilizers

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