Mansoura University, Faculty of Agriculture
Journal of Animal and Poultry Production
2090-3642
2090-3723
2
11
2011
11
01
SELECTION FOR IMPROVING EGG PRODUCTION IN MANDARAH CHICKENS TO MAXIMIZE THE NET INCOME. 1- CORRELATED RESPONSES, GENETIC PARAMETERS FOR EGG PRODUCTION AND GROWTH TRAITS
457
470
EN
F.
A.
Abdel-Ghany
Anim. Prod. Inst., Agric. Res. Center, Minist. Agric., Egypt.
A.
I.
Abdel-Ghany
Anim. Prod. Inst., Agric. Res. Center, Minist. Agric., Egypt.
10.21608/jappmu.2011.83409
The aim of the present study was conducted to estimate the correlated response, the genetic parameters (heritability, genetic and phenotypic correlations) of some egg number and growth traits in Mandarah chickens for improving egg number at the first 90 days of laying along three successive generations. Results showed significant differences between selected and control lines as well as among generations. The realized and expected response over two generations were increased body weight at hatch (BW0) 1.23 gm and body weight at four weeks (BW4) 20.27 gm, but decreased body weight at 12 weeks of age (BW12) -15.87, -75.62 gm for male and female. Growth rate was increased at different periods except female (Gr 4-8) decreased. Also, noticed that selection for increasing egg number during first 90 days of laying in Mandarah strain increased egg mass (232.7 g) and feed conversion (0.17 g) and reduced age at sexual maturity (- 8.06 days) and average egg weight (-0.47).
Estimates of heritability were (0.62 and 0.49) for ASM, and for BWSM (0.41 and 0.21), EN (0.35 and 0.38), EW (0.59 and 0.32), EM (0.39 and 0.36), feed conversion (0.37 and 0.22) for both the selected and control lines, BW0 (0.13 and 0.16), BW4 (0.32 and 0.31), BW8 (0.58 and 0.53) and BW12 (0.61 and 0.59) for both the selected and control lines, respectively. Genetic correlation in egg number in the selected line were positively associated with BW4 (0.21), BWSM (0.27) and EM (0.79), while, it with BW8 and BW12 weeks of age (-0.35 and -0.24), ASM (-0.39) and EW (-0.41) were negatively associated with egg number. There were low relationships between EN and the other traits studied. Genetic correlations between the other egg number and body weight traits showed a different genetic pattern in both selected and control lines. It could be concluded that selection for increased egg number during the first 90 days of laying in Mandarah strain decreased body weight and growth rate at different age. Heritability estimates based on sire component were higher for the selected line than the control one, which indicated that selection affected the heritability estimates<em>. </em>
https://jappmu.journals.ekb.eg/article_83409.html
https://jappmu.journals.ekb.eg/article_83409_1bc453fe82251e05ceb78af480521ef6.pdf
Mansoura University, Faculty of Agriculture
Journal of Animal and Poultry Production
2090-3642
2090-3723
2
11
2011
11
01
EFFECTS OF SEAWEED SUPPLEMENTATION TO FATTENING FRIESIAN STEERS RATIONS ON: 1-THE NUTRITIVE VALUE AND RUMEN FERMENTATION
471
483
EN
H.
M. E
Ead
Animal Production Res. Inst., Agric. Res. Center, Dokki, Giza, Egypt.
Eman
H. M.
Maklad
Animal Production Dept., Fac. Agric. Mansoura University, Egypt.
10.21608/jappmu.2011.83411
Three digestibility trials were conducted using three steers for each; which were with average body weight 392 ± 3.3 kg and 18 month of age. The experimental rations were formulated as follows: ration 1 (R1) 81.8% concentrate feed mixture (CFM) + 18.2% clover hay (CH) (control), ration 2 (R2): 81.55% CFM + 18.05% CH + 0.40% seaweed (S) and ration 3 (R3): 81.23% CFM + 17.87% CH + 0.90% S.
The results showed that there were no significant effect of feeding the experimental rations on the digestion coefficients for all nutrients and feeding values, but the digestion coefficients of OM, NFE, ADF, cellulose, ADL, NFC, TDN%, ME (Mcal/kg DM) and NE (Mcal/kg DM) were higher when feeding on R2 or R3 than R1.
The predicted values using net carbohydrate and protein system (CNCPS) showed that the sugar and starch fermentation were 276.6 and 729.4 g / d, respectively with feeding R1, 277 and 731.4 g / d, respectively for R2 and 277.6 and 737.2 g/d, respectively for R3. The total microbial protein was 1006, 1008.4 and 1014.8 g/d when feeding on R1, R2 and R3, respectively.
The mean values of ruminal pH, buffering capacity (BC), VFA’s were not significant affected by the different dietary treatments, while the concentration of NH<sub>3</sub>-N (mg/100 ml RL) tended to increase (p<0.05) when animals were fed on R2 or R3 (13.74 and 14.20 mg/100 ml RL, respectively) than R1 (11.82 mg/100 ml RL).
The present study showed that, the dry matter intake and nutrients digestibility were improved by supplemented seaweed but the total VFA's was higher with feeding on 81.55% CFM + 18.05% CH + 0.40 % seaweed (S) than the other rations.
Friesian steers,seaweed,digestion coefficients and fermentation
https://jappmu.journals.ekb.eg/article_83411.html
https://jappmu.journals.ekb.eg/article_83411_9ad50c9282d68a9d4abdd331100152ed.pdf
Mansoura University, Faculty of Agriculture
Journal of Animal and Poultry Production
2090-3642
2090-3723
2
11
2011
11
01
EFFECTS OF SEAWEED SUPPLEMENTATION TO FATTENING FRIESIAN STEERS RATIONS ON: 2- BLOOD PARAMETERS, PERFORMANCE AND FEED EFFICIENCY
485
491
EN
H.
M. E.
Ead
Animal Production Res. Inst., Agric. Res. Center, Dokki, Giza, Egypt.
Eman
H. M.
Maklad
Animal Production Dept., Fac. Agric., Mansoura University, Egypt.
10.21608/jappmu.2011.83412
Twelve male Friesian steers with average body weight 269<span style="text-decoration: underline;">+</span> 9 kg and 15 month of age were used in this study. Steers were distributed into three groups similar in number. The experimental rations were formulated as follows: ration 1 (R1) 81.8% concentrate feed mixture (CFM) + 18.2% clover hay (CH) (control), ration 2 (R2): 81.55% CFM + 18.05% CH + 0.40% seaweed (S) and ration 3 (R3): 81.23% CFM + 17.87% CH + 0.90% S.
The results obtained showed that the mean values of blood parameters were not significantly affected by the feeding on R1 or R2 or R3. The concentration of urea–N in blood was decreased with feeding on R2 and R3 than feeding on R1.
The average daily gains were 0.81, 1.00 and 0.83 kg/d for steers fed on R1, R2 and R3, respectively. The production efficiency was higher when feeding on R2 (24.04 %) than feeding on R1 or R3 (20.97 and 19.17%, respectively), and the economic efficiency, was higher when feeding on R2 (25.39 %) than feeding on R1 or R3 (13.3 and 3.94 %, respectively).
In general, the results indicated that feeding ration at a level 81.55% CFM + 18.05% CH + 0.4% S for fattening Friesian steers was economically improved animal performance compared with the other two rations.
Friesian steers,seaweed,daily gain and economic efficiency
https://jappmu.journals.ekb.eg/article_83412.html
https://jappmu.journals.ekb.eg/article_83412_60437e9553153bed1fc8d6a251a1f877.pdf