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Effects of Organic Manuring (chicken Droppings) on Growth of Labeo Rohita Ham. Spawn

S.A. Khan
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

G.U. Ahmed
Department of Aquaculture, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh

S.U. Ahmed
Bangladesh Fisheries Research Institute, Mymensingh 2201

Abstract/ Executive Summary:

An experiment was conducted in six nursery ponds to determine the effect of different doses of organic fertilizer (chicken droppings) on growth and survival of Labeo rohita spawn. Ponds were stocked with four-days old L. rohita spawn at a density of 25 g/decimal and reared for 25 days. Three doses of organic fertilizer viz. 20kg, 10 kg and 5kg per decimal were tried in treatments T₁, T₂ and T₃ respectively with two replication each. Fry were fed twice a day with a mixture of fine mustard oil cake and rice bran at the ratio of 1:1. The highest growth (6.33 cm and 3.33 g) and survival rate (72.30%) were observed for the treatment T₂. Physico-chemical and biological parameters were found within the productive range for all the treatments.

Keywords: Chicken manure, Spawn, L. rohita

Location: Fisheries Faculty, Bangladesh Agricultural University Campus.

Start Date: 00-00-1996

End Date: 00-00-1996

Program Area: Resource Development and Management

Commodity: Carp fish

Objectives:

To understand the effect of different doses of organic fertilizer (chicken droppings) on the growth and survival of lndian major carp, rohu (L. rohita).

Methodology:

The experiment was undertaken in 6 nursery ponds of the Fisheries Faculty, Bangladesh Agricultural University Campus, Mymensingh. The size of ponds were equal having 1.67 decimal (0.004 ha) each. The average depths of the ponds were 1.25 meter. The experiment was conducted during the month of July 1996. Three doses of fertilizer, like 20 kg, 10 kg and 5 kg chicken droppings/decimal in treatment T₁, T₂ and T₃ respectively, each with two replicates were applied. The ponds were prepared by cleaning them properly and then poisoned by phostoxin (aluminum phosphate) at a rate of 4 tablets/decimal. Three days after the use of phostoxin, lime (CaC0₃) was applied at a dose of 1 kg per decimal and then after 3 days, the ponds were fertilized properly by chicken droppings using proper dose in the respective three treatment groups. After 5 days of fertilization, the ponds were stocked with carp spawns (L. rohita) at a density of 25 g per decimal to the ponds of all the treatments. From the second day of stocking fry were fed twice daily with a mixture of finely powdered dried mustard oil cake and rice bran at the ratio of 1:1. Supplemental feed was applied on the following days maintaining 3 times of the initial stock of the spawn and was continued up to 5 days. On the consequent 5 days, the amounts of feed were increased 5 times, 7 times and 9 times respectively. Sampling was done every 5 days interval by dragging a hapa in the pond to check the growth. Survival rate was calculated after the final harvest. Weight and length of 30 fry/pond were recorded randomly during each sampling. Water quality parameters such as temperature, dissolved oxygen and pH were recorded at an interval of 5 days throughout the experimental period. Plankton samples were collected by filtering 15 litres of water through No. 55 bolting silk value of plankton net with a mesh size of 100 micro meter. Collected samples were preserved in 5% formalin. The Sedgwick Refter (S-R) cell was used to calculate the plankton population. The procedure was repeated 5 times for each sample and the average number of organisms was determined for one litre of water. After 25 days of rearing fry were harvested, first by repeated netting, finally by complete draining of ponds.

Source of Information: Bangladesh J. Fish. Res., 5(1), 2001: 23-28

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The chicken manuring (10 kg/decimal) in treatment T₂ is the best among all the treatments in case of fish growth. This might be due to the better ability of chicken manuring to enhance the production of plankton as the natural fish food organisms.

Knowledge Management: Journal