scholarly journals Effect of time, amount and frequency of feeding on total egg production, fertility and hatchability in broiler breeders

2013 ◽  
Vol 56 (1) ◽  
pp. 1014-1022
Author(s):  
M. G. Soltanmoradi ◽  
A. Seidavi ◽  
M. Dadashbeiki ◽  
F. Delgado ◽  
S. Gamboa
Keyword(s):  
Egg Production ◽  
Nutritional Composition ◽  
Feeding Schedule ◽  
Broiler Breeders

Abstract. The effects of timing, the amount and the frequencies of feeding on the performance of broiler breeders (Ross 308) at the age of 31–38 weeks were studied. The broiler breeders were randomly assigned to each of 15 treatments (T). These included day feedings, in which birds were fed once at 4.00 (T1 = control), twice (T2 to T7), thrice a day (T8 to T13) and four (T14 and T15) times per day. The daily feed allotment was divided into different ratios with different time schedules. The nutritional composition of all experimental groups was similar. Eggs were collected at 8.00, 10.00, 14.00 and 16.00. The results obtained showed that feeding schedule resulted in significant differences (P < 0.05) in egg production (% hen), as well as in fertility and hatchability. Results obtained in our study suggest that allocation of restricted feed two times a day, in a 75 : 25 ratio (4.00 and 12.00) improved egg production, fertility and hatchability.

scholarly journals Effects of monobutyrin supplementation on egg production, biochemical indexes, and gut microbiota of broiler breeders

2020 ◽  
Author(s):  
Xin Feng ◽  
Fangang Kong ◽  
Liwei Zheng ◽  
Qien Qi ◽  
Lina Long ◽  
...  
Keyword(s):  
Gut Microbiota ◽  
Egg Production ◽  
Broiler Breeders

scholarly journals Modelling the egg components and laying patterns of broiler breeder hens

2016 ◽  
Vol 56 (7) ◽  
pp. 1091 ◽  
Author(s):  
Nayara T. Ferreira ◽  
Nilva K. Sakomura ◽  
Juliano César de Paula Dorigam ◽  
Edney Pereira da Silva ◽  
Robert M. Gous
Keyword(s):  
Egg Production ◽  
Feeding Strategy ◽  
Simulated Data ◽  
Egg Yolk ◽  
Broiler Breeders ◽  
Broiler Breeder ◽  
Reproductive Process ◽  
Breeder Hens ◽  
Laying Performance ◽  
Broiler Breeder Hens

There is scant information about the reproductive process in broiler breeders, with which to develop a feeding strategy that will be economically optimal for these birds. This study aimed to model the egg production of a flock of broiler breeder hens, using non-isometric equations. The number of eggs produced by 60 broiler breeder hens aged 24–60 weeks was monitored, as was the weight of these eggs and the weights of the components, yolk, albumen and shell. Oviposition sequences and the number and length of pauses between sequences were analysed. Non-isometric functions were applied to predict the weight of the egg; yolk weight was predicted from the age of the hen, while albumen and shell weights were predicted from yolk weight; and egg weight was obtained by summing the component weights. The incidence of soft-shelled and double-yolk eggs was also determined. Yolk weight (YW, g) can be described as YW = 18.03 × (1 – e–0.015 × (t – 103.4)) × e(0.001 × t), where t is the age of the bird (days). The weights of albumen (AW) and shell (SW) were based on YW predictions as follows: AW = 14.38 × YW0.375 and SW = 0.358 × (YW + AW)0.687. The rate of double-yolk egg (DY) production is described by DY = 2.28 × e(0.209 × TFE), and the rate of soft-shelled egg (SS) production by SS = 1.126 + 0.148/(1 – 0.024 × TFE) – 0.056 × TFE, as a function of time from first egg (TFE). On the basis of the results obtained, the model developed here is an accurate reflection of the changes that occur in the number of eggs produced by broiler breeders, as well as in the egg itself and in its components over the entire laying period. This model can thus be used in predicting the nutrient requirements of individual broiler breeder hens, which, when combined with simulated data from a large number of individuals, will accurately describe the laying performance of a flock of broiler breeders.

PERFORMANCE OF DWARF BROILER BREEDERS IN LAYING CAGES AND FLOOR PENS AND OF NORMAL BREEDERS IN FLOOR PENS

1975 ◽  
Vol 55 (4) ◽  
pp. 741-747 ◽  
Author(s):  
J. H. STRAIN ◽  
A. P. PILOSKI
Keyword(s):  
Body Weight ◽  
Egg Production ◽  
General Pattern ◽  
Female Offspring ◽  
Male Offspring ◽  
Production Cycle ◽  
Feed Conversion ◽  
Broiler Breeders ◽  
Feed Costs

Dwarf broiler breeders in single-bird cages (DC), in floor pens (DF) and normal broiler breeders in floor pens (NF) were compared for their own and their offspring’s performance. No differences were observed in rate of egg production at 147–329 days of age between the NF and DF birds (48 vs. 47%) whereas the DC birds laid at the rate of 40%. Hen-housed egg numbers for the same period followed the same general pattern (NF, 81; DF, 82; DC, 70 eggs/bird). DF and DC birds consumed less feed per dozen eggs than the NF birds (3.4 vs. 4.3 kg/doz). Egg weights in the early part of the production cycle were not significantly different among the groups but at 294 days of age the normal birds laid larger eggs than the dwarfs (65 vs. 62 g). Dwarfs in cages reached 50% production earlier than the DF or NF birds. Female offspring from the three groups grew at the same rate and weighed 1.7 kg at 56 days of age but there were significant differences in feed conversion (NF, 2.46; DF, 2.43; DC, 2.53 kg/kg body weight produced). Male offspring had small but not statistically significant differences in body weight at 56 days (NF, 2.16; DF, 2.12; DC, 2.09 kg) or feed conversion (NF, 2.30; DF, 2.29; DC, 2.34 kg/kg body weight). Mortality in the offspring ranged from 2.7 to 9.2% but did not differ significantly. Income over feed costs per broiler started did not differ from the three groups regardless of the meat price – feed price combination considered. However, when profit was computed on a breeder hen basis, the DF females were more profitable than either the NF or DC females.

scholarly journals Stochastic Model of Egg Production in Broiler Breeders

2007 ◽  
Vol 86 (7) ◽  
pp. 1445-1452 ◽  
Author(s):  
R. Álvarez ◽  
P.M. Hocking
Keyword(s):  
Stochastic Model ◽  
Egg Production ◽  
Broiler Breeders

scholarly journals Feather loss and egg production in broiler breeders and layers

1988 ◽  
Vol 37 (3) ◽  
pp. 133-142 ◽  
Author(s):  
A. D. MILLS ◽  
J. M. FAURE ◽  
J. B. WILLIAMS
Keyword(s):  
Egg Production ◽  
Broiler Breeders

scholarly journals Effects of environmental temperature and dietary zinc on egg production performance, egg quality and antioxidant status and expression of heat-shock proteins in tissues of broiler breeders

2018 ◽  
Vol 120 (1) ◽  
pp. 3-12 ◽  
Author(s):  
Xiudong Liao ◽  
Wenxiang Li ◽  
Yongwen Zhu ◽  
Liyang Zhang ◽  
Lin Lu ◽  
...  
Keyword(s):  
Antioxidant Status ◽  
Egg Production ◽  
Environmental Temperature ◽  
Egg Quality ◽  
Basal Diet ◽  
Production Performance ◽  
Broiler Breeders ◽  
Zn Content ◽  
Liver And Pancreas ◽  
Shock Proteins

AbstractTo investigate the effects of environmental temperature and dietary Zn on egg production performance, egg quality and antioxidant status, as well as expression of heat-shock proteins (HSP) in tissues, of laying broiler breeders, we used a completely randomised design with a 2×3 factorial arrangement of treatments. The two environmental temperatures were normal (21±1°C, NT) and high (32±1°C, HT). The three dietary Zn sources were a Zn-unsupplemented basal diet (CON), and the basal diet supplemented with 110 mg Zn/kg as either the inorganic Zn sulphate (iZn) or the organic Zn proteinate with a moderate chelation strength (oZn). HT decreased (P<0·002) egg weight, laying rate, eggshell strength, thickness and weight, but increased (P≤0·05) rectal temperature, broken egg rate, misshapen egg rate, feed:egg ratio, Cu Zn superoxide dismutase activities in liver and pancreas, as well as metallothionein (MT) level in pancreas, andHSP70mRNA levels in liver and pancreas of laying broiler breeders. Broiler breeders fed the oZn diet had higher (P<0·04) Zn content in the liver, as well as MT levels in the liver and pancreas, compared with those fed the CON diet. Under HT, broiler breeders fed the oZn diet had higher (P<0·05) Zn content in the pancreas compared with those fed the iZn and CON diets. The results from this study indicated that HT impaired egg production performance and eggshell quality possibly because of the disturbed redox balance andHSPhomoeostasis, whereas the oZn is more available than the iZn for pancreatic Zn of heat-stressed laying broiler breeders.

scholarly journals Phenotypic study of egg production curve in commercial broiler breeders using Compartmental function

2018 ◽  
Vol 47 (0) ◽  
Author(s):  
Abbas Safari-Aliqiarloo ◽  
Masoomeh Zare ◽  
Farhang Faghih-Mohammadi ◽  
Alireza Seidavi ◽  
Vito Laudadio ◽  
...  
Keyword(s):  
Egg Production ◽  
Broiler Breeders ◽  
Commercial Broiler ◽  
Production Curve

scholarly journals The Relation of Obesity to Egg Production in Broiler Breeders

1975 ◽  
Vol 54 (1) ◽  
pp. 200-208 ◽  
Author(s):  
L.W. Chaney ◽  
H.L. Fuller
Keyword(s):  
Egg Production ◽  
Broiler Breeders
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