Performance of laying hens

Part 2 book "Probiotics in poultry production - Voncept and applications" includes content: Probiotics as alternatives to antimicrobial growth promoters (agps) in broiler nutrition: modes of action and effects on performance; probiotics and campylobacter colonization control in poultry; probiotics in laying hens – prevention of reproductive tract infections; probiotics as a strategy to fight necrotic enteritis in chicken; probiotics for salmonella control in poultry; probiotics and coccidiosis control in poultry.

125p muasambanhan02 18-12-2023 9 4   Download

Part 2 book "Alternative systems for poultry - health welfare and productivity" includes content: Housing and management of layer breeders in rearing and production, furnished cages for laying hens, performance, welfare, health and hygiene of laying hens in non cage systems in comparison with cage systems, housing and management of broiler breeders and turkey breeders, nutritional challenges of alternative production systems, .... and other contents.

195p oursky07 24-10-2023 6 4   Download

This study was conducted to compare the black and dark brown varieties of Noi purebred chickens raised in an intensive farming system. A total of 600 black and 600 dark brown Noi chickens were observed starting from 1 day after hatching. At 20 weeks of age, 30 black Noi cocks and 300 black Noi hens, as well as 30 dark brown Noi cocks and 300 dark brown Noi hens, were studied until the beginning of reproduction.

5p viargus 20-02-2023 2 0   Download

The excessive use of antibiotics in the livestock feed industry caused inevitable side effects of microbial resistance. Besides this residual antibiotics in animal-derived foodstuff imposed serious health problems for humans. So this study aimed to investigate the potential use of Bacillus velezensis to substitute antibiotics for poultry production.

8p vigandhi 23-02-2022 11 1   Download

Overfeeding reduces laying performance in broiler breeder hens, which is associated with obesity, hepatic steatosis and systemic inflammation. To unravel the underlying mechanisms governing the effect of feeding regimes on energy metabolism and egg production, a transcriptomics approach was carried out for screening differentially expressed genes (DEGs) in ovary, liver and adipose tissues of broiler chickens under ad libitum and restricted feeding.

9p visilicon2711 20-08-2021 7 1   Download

The compromised performance of laying hens in the late phase of production relative to the peak production was thought to be associated with the impairment of intestinal functionality, which plays essential roles in contributing to their overall health and production performance.

14p viansan2711 30-07-2021 9 0   Download

Changshun green-shell laying hens are unique to Guizhou Province, China, and have high egg quality. Improving egg production performance has become an important breeding task, and in recent years, the development of high-throughput sequencing technology provides a fast and exact method for genetic selection.

11p vilichoo2711 23-06-2021 12 1   Download

One hundred and forty four numbers of 40th week-old coloured broiler breeder hens were randomly distributed into 6 dietary treatments with three replicates with 8 chicks per replicate. The dietary treatments were: T1 (Control group): Basal diet; T2: Basal diet with 0.3 ppm of inorganic Se (SS-0.3); T3: Basal diet with 0.6 ppm inorganic selenium (SS0.6); T4: Basal diet with 0.3 ppm of organic selenium (SY-0.3); T5: Basal diet with 0.6 ppm of organic selenium (SY-0.6); and T6: Basal diet with 0.3ppm sodium selenite+0.3 ppm selenium yeast (SS-0.3+SY-0.3).

7p angicungduoc4 26-04-2020 13 1   Download

The present study was conducted on 600 Vanaraja birds reared in backyard system at Udalguri district of Assam under Tribal Sub Plan project. The overall body weight of male and female Vanaraja birds at 40th week of age was recorded as 3980.53 ± 330.74 and 3080.55 ± 143.22 grams, respectively. Age of hen at first egg laying was 162.55 ± 11.43 days. Egg production of Vanaraja bird was recorded as 146 ± 14.66 per bird per year. The benefit cost ratio of male at 16 week and female Vanaraja bird at 1 year was recorded as 2.05:1 and 1.96:1, respectively.

6p caygaocaolon4 04-04-2020 15 1   Download

This experiment was conducted to study the effects of natural zeolite on the performance of laying hens. One hundred and eighty 37-week-old Babcock B-300 hens were fed with a diet containing 0, 20, 40, 60 and 80 g clinoptilolite/kg in an experiment consisting of 36 hens per treatment during a 4x28 days experimental period.

6p aquaman27 15-01-2019 13 1   Download