Effect of Environmental Conditions in Poultry 
 Houses on the Performance of Laying Hens

Kocaman, Bahar; Esenbuğa, Nurinisa; Yıldız, Ahmet; Laçin, Ekrem; Macit, Muhlis

doi:10.3923/ijps.2006.26.30

Cited by 35 publications

(11 citation statements)

References 6 publications

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“…This suggests that decreasing humidity levels failed to lower egg weights. These findings support those from another study where a negative association between relative humidity and egg production was also observed (Kocaman et al, 2006). This is of significance in a semi-arid country like Namibia where humidity levels are generally low and it is desirable that this does not seem to reduce egg production or egg weights.…”

Section: Discussionsupporting

confidence: 90%

“…Minimum diurnal temperatures ranging from 13.4 to 17.5 0 C were significantly associated with greater mean egg weight (p<.01). These observations suggest that temperatures as low as 15 0 C could be ideal for layers (Kocaman et al, 2006). However, the fact that minimum temperatures at Farm A dip to as low as 5.2 0 C is a cause for concern.…”

Section: Discussionmentioning

confidence: 99%

“…According to some authors, the optimum ambient temperatures vary between 18-26 0 C (Holik, 2010;Hulzebosch, 2019;Kumar et al, 2017;Travel et al, 2011). However temperatures as low as 15 0 C (Kocaman et al, 2006) and as high as 27 0 C (Talukder et al, 2010) have been recommended. Temperatures above 27°C negatively affect feed consumption, egg weight and egg quality, especially shell thickness (Oguntunji and Alabi, 2010;Talukder et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…The ideal relative humidity (RH) for layers has been variously mentioned; figures up to 40% (Kumar et al, 2017), 50-70% (CocciForum, 2019), and 60-70%, (Kocaman et al, 2006;Lohmann Tierzucht, 2011;Talukder et al, 2010) have been recommended. According to Kocaman et al, (2006), high relative humidity and temperatures increase the levels of ammonia and encourage the growth of pathogens in poultry houses, thereby predisposing the layers to diseases and compromising egg production. However, low relative humidity may increase water intake if it is coupled with high temperatures.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of Factors Affecting Productivity and Profitability of Lohmann Brown Layers in A Semi-Arid Environment

Samkange¹,

Kandiwa²,

Mushonga³

et al. 2020

AJVS

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A prospective 27-week study investigated the effect of age, ambient temperature, humidity and photoperiod on egg weight and production in Lohmann Brown layers, and thus the profitability of the egg-producing enterprise at a farm in central Namibia, designated Farm A. Overall, age of birds, average temperature, humidity and photoperiod were strongly correlated with mean egg weight (r=0.84, 0.7,-0.51 and 0.7, respectively; p<0.001) but there was a weaker correlation of age, temperature, humidity and photoperiod to the number of eggs/bird (r=0.49, 0.41,-0.43 and 0.34, respectively). Increase in the age of birds, temperature and photoperiod resulted in a significant increase in mean egg weight. A decrease in humidity, however, resulted in a significant increase in mean egg weight. Labour and feed costs contributed 51% and 14%, respectively, to the overall costs of the enterprise. Egg sales contributed the bulk of the income at 88%, which was followed by the sale of spent layers at 12%.The study concluded that Lohmann Brown layers performed well in the semiarid conditions of central Namibia provided that extreme environmental conditions are avoided. The high input costs, especially labour and feed, were the main constraints to profitability and finding ways to reducing these costs is key to increasing profitability. Increasing the size of the flock is one practical way of offsetting the high labour costs.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of Factors Affecting Productivity and Profitability of Lohmann Brown Layers in A Semi-Arid Environment

Samkange¹,

Kandiwa²,

Mushonga³

et al. 2020

AJVS

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“…Both findings are signs of disliking the nest. Good ventilation in poultry houses is essential to regulate air quality for the welfare of the chickens as well as the farm workers (Kocaman et al, 2006;Whyte, 1993). Depending on the temperature and speed of the air, ventilation can also cause heat loss and thermoregulatory responses to prevent heat loss.…”

Section: Tablementioning

confidence: 99%

Relative preference for wooden nests affects nesting behaviour of broiler breeders

Oever

Rodenburg

Bolhuis

et al. 2020

Applied Animal Behaviour Science

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Optimising nest design for broiler breeders has benefits for both the animals and the producers. The welfare of the hens will increase by providing preferred housing, while also reducing eggs laid outside the nests. These floor eggs cause economic losses by compromised automatic egg collection and reduced saleability and hatchability. Attractiveness of nests can involve factors such as seclusion, material and microclimate. In this study, four nest box designs were offered in a relative preference test: a plastic control nest, a plastic nest with a partition to divide the nest in two areas, a plastic nest with a ventilator underneath to create air flow inside the nest and a wooden nest. Six groups of 100 hens and 9 roosters had access to these four nests in a randomised location during the ages of 20 to 34 weeks. Nest and floor eggs were collected five days a week. Camera images from inside the nests made during the ages of 24-25 weeks and 26-27 weeks were analysed for behaviour. This included general activity, nest inspections, nest visits and social interactions. At 32 weeks of age the wooden nests were closed, and the subsequent response of the hens was monitored in terms of number of eggs. We found a clear preference in number of eggs for the wooden nest (69.3 ± 1.0%) compared to the control nest (15.1 ± 0.8%), partition nest (10.2 ± 0.5%) and the ventilator nest (5.4 ± 0.4%; p < 0.0001 for difference between all nest designs). The preference for the wooden nest was also reflected in an increased time spent sitting, together with fewer nest inspections and visits per egg laid in the wooden nest. The preference for the wooden nest led to crowding, which caused an increased amount of piling, nest displacement, aggression and head shaking. The fact that the hens were willing to accept the crowded circumstances in these nests, underlines the strength of this preference. After the wooden nests were closed, the hens chose a new nest based on a combination of nest design and location. The control nest was still preferred over the other two plastic designs, although the neighbouring nests were overall preferred to the non-neighbouring nests. This study shows how the material used for nests is an important factor in suitability and should therefore be taken into account when designing nests.

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Research of Temperature Regime in the Module for Poultry Growing

Spodyniuk

Lis

2020

Lecture Notes in Civil Engineering

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Effect of Environmental Conditions in Poultry Houses on the Performance of Laying Hens

Cited by 35 publications

References 6 publications

Evaluation of Factors Affecting Productivity and Profitability of Lohmann Brown Layers in A Semi-Arid Environment

Evaluation of Factors Affecting Productivity and Profitability of Lohmann Brown Layers in A Semi-Arid Environment

Relative preference for wooden nests affects nesting behaviour of broiler breeders

Research of Temperature Regime in the Module for Poultry Growing

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