Effect of dietary inclusion of ascorbic acid and palm oil on the performance of laying hens in a hot tropical environment

Njoku, P. C.; Nwazota, Adeline O. U.

doi:10.1080/00071668908417209

Cited by 24 publications

(15 citation statements)

References 26 publications

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“…Finally, it should be noted that recent studies have indicated that the liveability and production of heat-stressed laying hens can be improved by supplementing their diet with ascorbic acid or vitamin E (Njoku and Nwazota, 1989;Cheng et al, 1990;Bollengier-Lee et al, 1999;Puthpongsiriporn et al, 2001). Also, the lower concentrations of plasma calcium and inorganic phosphate in hens exposed to 30ºC compared to 18ºC (Usayran and Balnave, 1995) may provide some evidence of an increased requirement for these minerals in heat-stressed laying hens.…”

Section: Nutritional Management During Laymentioning

confidence: 91%

“…An increase in dietary fat content may be required to obtain high dietary ME concentrations. The inclusion of 5% tallow (Reid, 1981), or 4% soybean oil (Usayran et al, 2001), in diets for young laying hens at high temperatures and the use of palm oil at heat stress temperatures (Njoku and Nwazota, 1989) have been shown to improve egg output although in older hens the major effect was to increase body weight or reduce body weight loss. This suggests that intervention strategies have to be applied early in the egg production cycle.…”

Section: Nutritional Management During Laymentioning

confidence: 99%

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Nutrition and management of heat-stressed pullets and laying hens

Balnave

Brake

2005

World's Poultry Science Journal

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Maximum daily temperatures in excess of 30ºC are common in many table eggproducing regions of the world. Such temperatures require the application of specialized management and nutrition if laying hens are to produce eggs near their genetic potential. Environmentally-modified buildings have been shown to be especially advantageous for commercial layers that are housed in high density cage facilities. Directing air movement onto floor-housed birds has also been found to maximize heat loss and was beneficial as long as the air temperature did not exceed body temperature. This latter procedure was especially useful where sporadic incidences of heat stress were common. Nutritional manipulation of the diet also offers advantages, especially in overcoming problems of reduced appetite. This principle has been shown to apply to both growing pullets and adult layers. Recent research has confirmed that optimum production during lay depends on the adult hen having an adequate gut capacity and sufficient nutrition during rearing. Egg production during moderate heat stress can be improved by increasing the intake of protein relative to energy but energy requirements will likely increase in severe heat stress. Dietary supplementation with ascorbic acid and vitamin E and a supply of cool drinking water have also been reported to improve production during lay but the response to the latter treatment varied with genotype.

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Section: Nutritional Management During Laymentioning

confidence: 91%

Section: Nutritional Management During Laymentioning

confidence: 99%

Nutrition and management of heat-stressed pullets and laying hens

Balnave

Brake

2005

World's Poultry Science Journal

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“…In experiment II, pheasants given the vitamin C supplemented feed were characterized by higher egg production compared to the control group. Njoku and Nwazota (1989) also ascertained that the vitamin C supplement of 200, 400 and 600 mg/kg given to laying hens in tropical conditions caused a proportional increase in the number of eggs laid. Sushil et al (according to Whitehead and Keller, 2003) found that out of all hens kept at an elevated temperature (30°C) from 24 to 40 weeks of age, birds given a diet supplemented with 800 mg/kg vitamin C were characterized by a higher laying rate compared to the control group.…”

Section: Discussionmentioning

confidence: 99%

“…The beneficial effect on egg production of vitamin C added to feeds for laying hens was particularly evident when the birds were exposed to stress caused by high air temperature or increased stocking rate of birds per unit area (Njoku and Nwazota, 1989;Kontecka et al, 1997). Peebles and Brake (1985) were among those researchers who reported the influence of vitamin C added to the feed on the improvement of hatchability in broiler chickens.…”

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Effect of dietary vitamin C supplement on reproductive performance of aviary pheasants

Nowaczewski¹,

Kontecka²

2005

CZECH J ANIM SCI

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ABSTRACT:The effects of three doses of vitamin C (100, 200 and 300 mg/kg) added to the feed of reproductive pheasants on egg production, egg fertility and parameters of hatchability were investigated. In experiments I (1999) and II (2000) birds were kept in outdoor aviaries. In 2000, air temperatures recorded on the farm during the experiment were high (25)(26)(27)(28)(29)(30) o C), differing considerably from those recorded in the preceding years. In experiment I no statistically significant differences were shown between the control pheasants and those supplemented with 100 and 200 mg/kg vitamin C in terms of egg production, egg fertility and parameters of hatchability. The poorest results were found in the group of birds receiving a feed supplemented with 300 mg/kg vitamin C. In experiment II, statistically higher egg production and egg fertility were noted, compared to the control group, in the groups supplemented with 100 and 200 mg/kg vitamin C. Compared to the control group, pheasants from these groups were also characterized by higher hatchability from set eggs (by approx. 15 percentage units) and fertilized eggs (by approx. 9 percentage units) and smaller number of unhatched chicks and dead embryos after day 10 of incubation. In experiment II, the beneficial effect of 100 and 200 mg supplements of vitamin C on the studied parameters could result from the soothing action of the vitamin on the effects of heat stress. The present results justify the prophylactic use of vitamin C supplement at 100 mg/kg feed in the nutrition of reproductive pheasants reared in aviaries. Under heat stress (high air temperatures) increasing the dose of this vitamin to 200 mg/kg feed seems beneficial.

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“…The inclusion of 5 % of fat [20] in the diet of broiler chicks, 5 % of fat [21] and 4 % of soybean [22] or palm oil [23] for young hens at high temperature makes it possible to improve poultry productivity. This is because, first, fat enhances the palatability of fodder and encourages its consumption, and second, less endogenous heat is produced in fat metabolism than in protein and carbohydrate metabolism [14,24,25].…”

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confidence: 99%

HEAT STRESS IN POULTRY. II. METHODS AND TECHNIQUES FOR PREVENTION AND ALLEVIATION (review)

Фисинин¹,

Kavtarashvili²

2015

S-h. biol.

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A b s t r a c tAn adverse effect of heat stress in poultry depends on both the external factors such as diet, water supply, rearing technology, birds' population density, air humidity and flow rate, etc., and the internal factors, particularly, poultry species and breed specificity, physiological conditions, etc. Herein, the approaches to prevention and alleviation of heat stress in poultry are summarized and discussed. Different strategies were proposed for lowering of body heat production and for better heat dissipation, thus maintaining productivity and product quality and minimizing losses for poultry farms. These strategies include the increase in energetic level of a diet in accordance with decrease in feed consumption due to stress (N.J. Daghir, 2009) and inclusion of higher (up to 4-5 %) levels of fat (B.L. Red, 1981; N. Usayran et al., 2001; A.A. Ghazalah et al., 2008); decrease by 2-4 % of dietary crude protein (Q.U. Zaman et al., 2008) and carbohydrate levels (metabolization of fat produces less heat than protein and carbohydrates) (N

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Effect of dietary inclusion of ascorbic acid and palm oil on the performance of laying hens in a hot tropical environment

Cited by 24 publications

References 26 publications

Nutrition and management of heat-stressed pullets and laying hens

Nutrition and management of heat-stressed pullets and laying hens

Effect of dietary vitamin C supplement on reproductive performance of aviary pheasants

HEAT STRESS IN POULTRY. II. METHODS AND TECHNIQUES FOR PREVENTION AND ALLEVIATION (review)

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