EFFECT OF USING Spirulina platensis AND/OR Chlorella vulgaris ALGAE AS FEED ADDITIVES 0N PRODUCTIVE PERFORMANCE OF BROILER CHICKS.
A.
Abou-Zeid
Fac. Of Agric., Tanta Univ., Tanta, Egypt.
author
S.
El-Damarawy
Fac. Of Agric., Tanta Univ., Tanta, Egypt.
author
Y.
Mariey
Anim. Prod. Res. Inst.,Agric.Res. Center, Egypt.
author
M.
El-Mansy
Fac. Of Agric., Tanta Univ., Tanta, Egypt.
author
text
article
2015
eng
The present study was designed to evaluate the productive performance of commercial broiler chicks fed Spirulina platensis and chlorella vulgaris algae containing diets. Four hundred and twenty day-old unsexed Cobb broilers chicks were used in this experiment. Birds were legs-banded, individually weighed, and randomly distributed into seven equal experimental groups; with three replicates of 20 chicks each. The average initial body weights of the treatments groups were nearly similar without significant differences. Chicks were kept in floor pens and subjected to 23 h. lighting along the experimental period which extended to 6 weeks of age. The house temperature was maintained at about 34ºC during the first 3 days, 32ºC during next 4 days and thereafter, gradually decreased by 3ºC weekly down to 24ºC. Basal control diet was formulated to contain 3100 kcal ME/kg and 23.01% crude protein during the starting period (till 21 days of age) followed by 3200 kcal ME/kg and 20.05% crude protein during the finishing period (21-42 days of age). The basal control diet was supplemented with spirulina and/or chlorella powder at levels of (1 g spirulina), (2 g spirulina), (1 g chlorella), (2 g chlorella), (0.5 g spirulina + 0.5 g chlorella), and (1 g spirulina+1 g chlorella/kg of diet, respectively). The obtained results cleared that birds fed 2 g spirulina/kg diet achieved superior means of body weight, body weight gain, and feed conversion ratio compared to the control group and the other treatments.
Journal of Animal and Poultry Production
Mansoura University, Faculty of Agriculture
2090-3642
6
v.
10
no.
2015
623
634
https://jappmu.journals.ekb.eg/article_52940_7e45f6023428cb9cc2c93144f16eaea1.pdf
dx.doi.org/10.21608/jappmu.2015.52940
EFFECT OF STOCKING DENESITY AND FEEDING RATE ON PRODUCTION OF EARTHENPONDS CULTURED WITH NILE TILAPIA (Oreochromis niloticus).
M.
Ramdan
Anim. Prod. Dept., Fish production, Faculty of Agriculture, Al-Azhar University, Cairo.
author
N.
Abdel-Hakim
Animal Production Department, Animal Nutrition, Faculty of Agriculture, Al-Azhar University, Cairo.
author
M.
Lachine
Animal Production Department, Animal Nutrition, Faculty of Agriculture, Al-Azhar University, Cairo.
author
D.
EL-Azab
Anim. Prod. Dept., Fish production, Faculty of Agriculture, Al-Azhar University, Cairo.
author
A.
Zaghloul
Anim. Prod. Dept., Fish production, Faculty of Agriculture, Al-Azhar University, Cairo.
author
text
article
2015
eng
The study was conducted over a 98 days period in order to study effects of stocking density and feeding rate on production of earthen ponds cultured with Nile tilapia (Oreochromis niloticus). Each hapa measuring 2*4*1m was suspended in an earthen pond (4000m2). There were 6 treatments, each consisting of three replicates, stocked with fish of mean individual initial bodyweigh19g. A total number of 32, 64 and 128 Nile tilapia were randomly distributed into 6 treatment groups, representing 3 stocking rates, and were fed daily at rates (zero, 3, and 4%) of fish live bodyweight. Fish were fed a balanced diet of 28.5% crude protein along the period of the experiment. The treatments were stocking densities (4, 8, and 16 fish/m3) and feeding rates (zero, 3, and 4%). The results indicate that the best final bodyweight, feed utilization, physiological status, and chemical composition was obtained by group T7 (stocking density 4fish/m3 and feeding rate 4%).
Journal of Animal and Poultry Production
Mansoura University, Faculty of Agriculture
2090-3642
6
v.
10
no.
2015
635
645
https://jappmu.journals.ekb.eg/article_52943_db3e72770323d6d5ace299c53a5c1b0a.pdf
dx.doi.org/10.21608/jappmu.2015.52943