2024-03-29T08:35:43Z
https://jappmu.journals.ekb.eg/?_action=export&rf=summon&issue=8070
Journal of Animal and Poultry Production
2090-3642
2090-3642
2015
6
2
DIETARY ROUGHAGE SOURCES, LEVELS AND ITS IMPACT ON THE FATTENING PERFORMANCE OF OSSIMI MALE LAMBS AND CARCASS CHARACTERISTICS
M.
EL Sysy
Forty Ossimi early weaned male lambs (8 weeks old age and 12.86 kg live body weight) were used in a study for 32 wks to investigate the effect of dietary roughage sources and levels during growing and finishing periods on lambs performance and carcass characteristics. At the beginning of 9th week, animals were randomly assigned into four nutritional treatments (each of 10 animals), while a starter ration 15.87 % DCP and 85.23 % TDN was prepared to serve as a control diet during the 1st period. The experimental study included two feeding periods. In the first period (12 weeks), roughage sources i.e. Peanut hulls (PH), sugarcane bagasse (SCB) and ground corn cobs (Ccb) were incorporated at 10 % to substitute 10 % corn grains in the control diet to attain three isonitrogenous and caloric rations (16.65 % DCP & 82.40 % TDN). In the second period, roughage levels were increased to 40% from rations composition to attain (13.21 CP and 64.07 TDN %). Metabolic trials were conducted by the end of each feeding period. By the end of the finishing period, 12 randomly slaughtered animals were dressed to justify carcass traits and meet chemical composition. Results obtained indicated that dietary roughage sources and levels didn’t affect significantly lambs growth performance during the two feeding periods. However, lambs raised on both (Ccb) and (SCB) rations showed higher (p<0.05) feed conversion ratios, lower (p<0.05) feed costs and higher (p<0.05) net profit returns by the end of the finishing period. Growth performance during the whole period (32wks), pointed out to insignificant difference among groups. Results of carcass characteristics revealed that dietary roughage sources neither affect significantly hot carcass weight nor edible offal organs, however lambs offered (Ccb) ration showed relatively higher insignificant hot carcass weight in compare with the other tested roughages. Dietary roughage sources didn’t have any significant influences on the chemical composition of eye muscle tissues (longismus dorsi).
Dietary roughage
performance
Ossimi lambs and carcass characteristics
2015
02
01
55
72
https://jappmu.journals.ekb.eg/article_52730_0e871bdfa83aec2d5673424a5dcbf13c.pdf
Journal of Animal and Poultry Production
2090-3642
2090-3642
2015
6
2
SELECTION FOR MASTITIS RESISTANCE AND SOMATIC CELL COUNTS TO IMPROVING MILK PRODUCTION IN EGYPTIAN BUFFALOES
Set El-Habaeib
Awad
Estimates of (Co)variance components and genetic parameters by using MTDFREML program for milk yield (MY), somatic cell count (SCC) and mastitis (MAST ) based on 1901 records of Egyptian buffaloes during the period from 2005 to 2008 at Mehallet Mousa Experimental farms were obtained. The mixed model used in the analysis included the fixed effects of month and year of calving and parity and the random effects of additive direct genetics and residual. Means of MY and SCC, were 2003 kg and 280,000 cells/ml, respectively in the animal without mastitis, 1230 kg and 1,500,000 cells/ml, respectively, in the animal with mastitis. Estimates of direct heritability for MY, SCC and MAST were 0.42, 0.30 and 0.32, respectively. Estimates of genetic correlation among MY with SCC and MAST were -0.26 and -0.45, respectively. Corresponding estimates of phenotypic correlation were -0.15 and -0.30, respectively between the same traits. Single-traits selection for MY resulted in genetic improve of 320.7 kg, -24990 cells/ml, -0.05 of MY, SCC and MAST, respectively. Comparisons between four selection indices in two methods of the relative economic values showed that the selection indices first and second in two methods which incorporated all studied traits and dropped MAST were the best indices. Ranking correlation between two methods was 0.95. Thus, it was recommend to use the method 2 of the relative economic values because its simplicity and ease of calculation.
Selection for MY with either SCC and MAST or SCC and MAST together lead to improve the efficiency of response of aggregate genotype compared with selection based on MY only. The selection indices which incorporated all studied traits and constructed by each the two methods of the relative economic values were recommended for use if selection is to the practiced at the end of the first lactation in Egyptian buffaloes.
genetic parameters
Somatic cell count
mastitis
relative economic value
selection index and Buffaloes
2015
02
01
73
84
https://jappmu.journals.ekb.eg/article_52731_540687c458e61ef04644d137b7143469.pdf
Journal of Animal and Poultry Production
2090-3642
2090-3642
2015
6
2
THE EFFECT OF OMEGA -3 ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCE OF SHEEP 1- EWES AND EWE LAMBS
Y.
Hafez
A.
Metwally
M.
Ali
Azza
El-Madawy
Total of 75 mature healthy (1/2 Finnish Landrace × 1/2 Rahmani ewes) at 3-6 years of age and weighing approximately 45.21 kg were divided into three similar groups (control, G2 and G3). The first group was fed the control diet (G1). While, fish oil was added to the control diet at level of 1.5 and 3% of total DM intake for G2 and G3, respectively (first trail).While, in the second trail, 24 female lambs at 3 months of age with an average live body weight of 14.5±0.6 kg were randomly divided into three groups (8 lambs each). The first group was fed a basal diet, while G2 and G3 treated with fish oil at 1.5 and 3% of total DM intake, respectively.
The results of this study indicated that the live body weight of ewes was not affected significantly by dietary treatments during pregnancy period and after lambing. Percentage of ewes exhibited estrus was higher in G2 (68%) than in G1 and G3 (44 and 48%, P<0.05), respectively. Fertility rate was 77.7, 70.5 and 100% in control, G2 and G3, (P<0.05). Litter size tended to gradually increase with increasing fish oil level. The results indicated that added fish oil (G2 and G3) led to increase total milk yield by about 45.2 % and 38.1 % than the control group but the differences were not significant.
Age at puberty in ewe lambs was 318.1, 273 and 290.3 days for control, G2 and G3, respectively (P<0.05). Average daily gain of ewe lambs was the highest level (P<0.05) in G3 (103.7 g) followed by G2 (98.15 g), while G1 had the lowest value (70.74 g). The lowest feed cost/kg gain was recorded in G2 and G3 (19.86 and 19.49 LE, respectively), while the highest feed cost/kg gain was recorded in G1 (23.72 LE). On the light of the foregoing results, fish oil addition at rate of 1.5 and 3% to mature ewes and growing lambs had beneficial effects on productive and reproductive performance.
2015
02
01
85
97
https://jappmu.journals.ekb.eg/article_52732_2a509ad7d941257fe9c5dbf455bcc430.pdf
Journal of Animal and Poultry Production
2090-3642
2090-3642
2015
6
2
EFFECT OF IODINE SUPPLEMENTATION TO LOW ENERGY DIETS ON PRODUCTIVE AND REPRODUCTIVE PERFORMANCE IN LAYING HENS OF LOCAL SINAI STRAIN
A.
Ibrahim
M.
Beshara
Hanan
Mohamed
A total number of 297 Sinai hens (270 females and 27 males) 42-wks-old were used, weighed and divided into nine treatment groups, three replicates each, to investigate the effect of Iodine supplementation to low metabolizable energy (ME) layer diets in a factorial design (3x3) on laying performance, egg quality parameters, reproductive performance and nutrients digestibility as well as some blood constituents during the late stage of laying period (42-58 wks of age). The dietary ME of treatments were 2766 (as control); 2655 and 2565 kcal ME/kg, with three iodine levels of 0.3 (as control); 1.2, or 2.4, mg iodine/ kg diet. Results obtained could be summarized as the following:
1- Decreasing ME content in the Sinai layer diet resulted in a significant decrease in body weight and body weight gain (BWG) while diet supplemented with 2.4 mg/ iodinekg diet had the highest BWG compared to other groups. Also, BWG was significantly affected due to the interaction between iodine and ME.
2- Laying rate percentage and egg mass (g/hen) was significantly decreased by dietary contained 2565 Kcal/Kg diet. Conversely, the hens fed diet 1.2 and 2.4 mg I/Kg diet significantly improved the laying performance. Also, the superiority of the diet contained 2655 Kcal/Kg with 2.4 mg iodine /Kg diet where it was significantly greater laying performance than all other treatments.
3- No significant effect was observed on reproductive performance by feeding different levels of ME, while hatchability percentage was significantly improved as dietary supplemented with 1.2 and 2.4 iodine/ kg diet. Also, the best significant value of hatchability was recorded by the interaction between 2655 Kcal ME/ kg and 2.4 mg iodine/ kg diet.
4- Decreasing ME content from 2766 to 2655 and 2565 Kcal/kg diet showed linear significant higher feed consumption. While, only the low level of ME (2565 Kcal/Kg diet) significantly decreased feed conversion ratio compared to the control.
5- Iodine supplementation (1.2 and 2.4 mg/kg diet) resulted in a significant linear feed consumption decreased compared to the control diet. Also, hens fed diet contained 1.2 and 2.4 mg iodine/Kg diet produced significantly better feed conversion than control diet.
6- Feed conversion ratio was significantly improved by the diet containing ME 2655 Kcal/Kg diet + 2.4 mg I /Kg diet as compared to the control diet by about 15.5 %.
7- Digestion coefficient of Ether extract (EE) and ash retention were significantly increased by decreasing the ME to 2565 Kcal/Kg diet compared to the control diet (2766Kcal/Kg diet). All values of nutrients digestibility tend to be significantly linear increase for birds fed diets supplemented with 1.2 and 2.4 mg iodine/Kg layer diet as compared to control diet (0.3 mg I/Kg diet).
8- Dietary energy level has significant effect on blood metabolites, except triglycerides, and improved HDL concentration and thyroxin level, especially the low followed by the median ME level.
9- Dietary iodine supplementation, up to 2.4 mg/ kg diet improved blood parameters, hematological traits, T3 level, and T3/T4 ratio without any negative effects on liver function and immune responses, in terms of ALT, AST activity and WBC′s count.
10- The combined effect between low and median ME and high iodine is the best for different productive and physiological parameters.
11- Decreasing dietary ME content from 2766 to 2655 Kcal/Kg diet resulted in no significant effect in economic efficiency. On the other hand, the high level of iodine (2.4mg/Kg diet) with decreasing ME from 2766 to 2655 Kcal/Kg diet resulted in significantly higher economic efficiency than all other treatments.
The results illustrated that the adequate level of ME for Sinai laying hens was 2655 Kcal/Kg diet to maximize the productive performance under the condition of this study, however the combination of same level of ME (2655 Kcal/ Kg diet) and 2.4 mg iodine/ Kg diet is the most successful requirement for improving laying performance and reproductive performance for Sinai laying hens during the late stage of laying period (42- 58 wks of age).
Metabolizable energy
Iodine
Laying performance
Hatchability
Nutrients
2015
02
01
99
135
https://jappmu.journals.ekb.eg/article_52733_cf66280030ef03c252e4f591a1a1fd8b.pdf