Theses and Dissertations

Title: Influence of non-nitrogenous fertilization upon benthic organisms in ponds stocked with different numbers of Tilapia mossambica Peters

Name: Sumawidjaja, Kusman

Degree: MS

Chair: Dr. John S. Dendy

Resides: FAA Library

University: Auburn

Location: Auburn, Alabama

Date: 1966

Pages: 61

Keywords: Non-Nitrogenous Fertilization,Benthic Organisms,Stocking Rates,Tilapia mossambica.


An experiment was conducted to deermine the effect of omitting nitrogen from N-P-K fertilizer in a series of twelve 0.25-acre ponds of the Alabama Agricultural Experiment Station, Aubnrn University, Auburn, Alabama, from July 6 through October 14, 1964. This experiment involved two fertilizer treatments, non-nitrogenous fertilization (0-8-2) and complete fertilization (8-8-2), and a non-fertilizer control (0-0-0) together with different rates of stocking of 2,000, 4,000, 6,000 and 8,000 Tilapia mossambica Peters per acre. Bethic organism were used as parameters. The dry weights of organism plus debris from multiple-plate samplers were the same from ponds recerving non-fertilizer control as from ponds receiving complete fertilization. Plates from ponds receiving non-nitrogenous fertilization produced higher weights than plates from ponds receiving non-fertilizer control or complete fertilization. The number of chiromoid larvae, the number of oligochaete worms on multiple-plate samplers and the number of chironomid larvae taken by the Ekman dredge from ponds receiving non-nitrogenous and complete fertilization were the same and greater than those from ponds receiving non-fertilizer control. The number of chironomid larvae on multiple-plate samplers increased as the rate of stocking increased.

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