Departmental Reports


Title:

CYCLE II RAINY SEASON POND DYNAMICS/AQUACULTURE
C.R.S.P.
( text in English and Spanish )



Author(s):

Green, Bart, Hermes Alvarenga, Ronald Phelps, Jonathan Espinoza



Date: 1986



Funding Agency: USAID/CRSP



Keywords: aquaculture, honduras, research, tilapia, international, crsp



Category: International Funded Research Report



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Summary/Recommendations/Objectives:

The hypothesis was that inorganic and inorganic fertilization rtsUit in the $ilnt ulapia production cfo.ring the rainv Hason was tested at the "E1 Carao" Aquacultural Experiroolt Station, Coma\laQUa, Hondlras as part of the Cllolt II Aquaoulture CRSP.

Similar quanums of rritroqen and phosphorus were added to ponds as either layer chicken Htter or urea and triplesuptrphosphate;

each treatment had 6 replicates. Chicken litter was applied at a rate of 500 kglha/wk on a dry matter

basis, 'R'hile urea was added at a rate of 31.3 kg/ha/wk and trlple-super'phosplte at a rate of 49.3 kglha/wk. Male

Tilapia nilotica were stocked into 0.1 ha earthen ponds at 10,000 fishlha. Tilapia production was greater wllere chicken

litter was the nutrient source (1594 kg/ha/150 d) than with chemical fertilizer (1153 kglha/150 d). ¥ater quali\y

parameters were genwalllj different between treatments although neither treatment 'Was oonsistentllj greater across all

variables measured. Total alkalinity to the methyl orange end point, total and calcium hardness "Were greater where chicken

litter yas used, while nitrogen and phosphorus 'Were greater where chemical fertilizer 'Was used.

 

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