scholarly journals Research notes: Effect of environmental temperature on broiler chickens subjected to growth restriction at an early age

1998 ◽  
Vol 77 (6) ◽  
pp. 870-872 ◽  
Author(s):  
I Plavnik ◽  
S Yahav
Keyword(s):  
Broiler Chickens ◽  
Environmental Temperature ◽  
Growth Restriction ◽  
Early Age

Effect of induction of thermotolerance with vitamin C, E supplementation on performance broiler chickens reared at during heat stress

2005 ◽  
Vol 2005 ◽  
pp. 169-169
Author(s):  
S. Roshani ◽  
A. M. Tahmasbi ◽  
A. Taghizadeh ◽  
M. Valizadeh
Keyword(s):  
Heat Stress ◽  
Vitamin C ◽  
Feed Efficiency ◽  
Broiler Chickens ◽  
Environmental Temperature ◽  
Live Weight ◽  
Early Age ◽  
Nutrient Supplementation ◽  
Carcass Characteristic ◽  
Negative Effect

The stress of high environmental temperature may have a deleterious influence on the performance of broiler chickens by reducing feed intake, live weight gain and feed efficiency. Exposing chicks to 36-38°C for 24h at 5d of age reinforces the resistance of older (6 to 7 wk-old) broilers to heat stress (De Basillo et al., 2003). Several studies have revealed that antioxidant nutrient supplementation especially vitamin C and E can be used to alter the negative effect of environmental stress (NRC, 1984). Combination of antioxidant vitamins generally shows greater antioxidant activity than that of each component alone. The objective of this study was to investigate the effects of early age thermal conditioning and vitamin C, E supplementation on performance, carcass characteristic in broiler chickens reared under heat stress.

A study of the metabolism of two breeds of pig: (With some remarks on a third)

1929 ◽  
Vol 19 (1) ◽  
pp. 140-184 ◽  
Author(s):  
Thomas Deighton
Keyword(s):  
Critical Temperature ◽  
Body Temperature ◽  
Environmental Temperature ◽  
Unit Area ◽  
Skin Colour ◽  
Early Age ◽  
Large White ◽  
Different Ages

The metabolism of a Berkshire and a Middle White pig has been investigated by means of the calorimeters at the School of Agriculture, Cambridge. The general routine and technique of the observations have been as heretofore.Measurements of the fasting katabolism of each of the two pigs have been obtained in a series extending from an early age to maturity, and the phenomena in general follow the lines of those originally discovered in the Large White; but the fasting katabolism of the Middle White was below that of the Large White earlier studied.The fall in body temperature and in metabolism during the fasts were found to be correlated, and the possible effect of skin colour in this matter is noted.The effect of environmental temperature is investigated and reasons are given for supposing that the critical temperature of the Middle White pig is very low.It is concluded that the existence of a maximum somewhere in the curve showing fasting katabolism per unit area at different ages is necessitated by the two physiological facts (a) that warm blooded animals have to be maintained at a temperature which varies only within very narrow limits, and (b) that the processes of growth are accompanied by waste of energy as heat.

scholarly journals Effect of Low Environmental Temperature on Performance and Blood System in Broiler Chickens (Gallus domesticus)

2007 ◽  
Vol 76 (8) ◽  
pp. S17-S23 ◽  
Author(s):  
J. Blahová ◽  
R. Dobšíková ◽  
E. Straková ◽  
P. Suchý
Keyword(s):  
Broiler Chickens ◽  
Environmental Temperature ◽  
Liver Weight ◽  
Abdominal Fat ◽  
Blood System ◽  
Gallus Domesticus ◽  
Heart Weight ◽  
Feed Conversion ◽  
Total Proteins ◽  
Conversion Performance

The aim of this study was to assess the effect of low environmental temperature on growth, feed conversion, performance and selected biochemical and haematological indicators in broiler chickens. The decrease in air temperature since the 22nd day of growth influenced significantly (p < 0.05) the level of total proteins, uric acid, phosphorus (in female broiler chickens), glucose (in male broiler chickens), haemoglobin (in female broiler chickens) and liver weight (in male broiler chickens). The temperature influenced significantly (p < 0.01) the level of triiodothyronine, haemoglobin (in male broiler chickens), haematocrit, abdominal fat content (in male broiler chickens), and heart weight too. The results have clearly confirmed that during growth, the decrease in environmental temperature (cold stress) negatively influenced some indices of performance and blood system in broiler chickens.

scholarly journals Environmental Temperature and the Incidence of Unabsorbed Yolks in Sexed Broiler Chickens

1978 ◽  
Vol 57 (1) ◽  
pp. 316-318 ◽  
Author(s):  
S. LEESON ◽  
J.P. WALKER ◽  
J.D. SUMMERS
Keyword(s):  
Broiler Chickens ◽  
Environmental Temperature

Effect of a processed soy protein product on growth and gut physiology of broiler chickens

2015 ◽  
Vol 3 ◽  
Author(s):  
S.S.M. Beski ◽  
P.A. Iji
Keyword(s):  
Soy Protein ◽  
Broiler Chickens ◽  
Basal Diet ◽  
Protein Product ◽  
Early Age ◽  
Digestive Physiology ◽  
Feed Conversion ◽  
Broiler Performance ◽  
Surface Areas ◽  
Medium Level

SummaryA 4 × 2 factorial experiment was conducted to investigate the effect of a processed soy protein (PSP) on broiler performance and digestive physiology. Four inclusion levels of PSP (0, 25, 50 or 100 g/kg in either corn or wheat-based diets) were used in the starter diets. Feed intake was significantly lower (P < 0.01) on corn-based diets than those on wheat-based diets at 35 d. Over the first 10 d, chicks on corn-based diets tended (P < 0.09) to have higher body weight (BW) than wheat-based diet chicks. Across the 35 d trial, PSP level showed a strong tendency (P < 0.06) to be related to higher BW in birds, regardless of grain type. Both grain and PSP experimental factors significantly (P < 0.01, and P < 0.001) interacted at an early age, improving BW and feed conversion ratio (FCR) for birds received high PSP on wheat-based diets. Significantly heavier (P < 0.01) small intestine and gizzard + proventriculas weights at an early age, and heavier (P < 0.001) gizzard + proventriculas and pancreas during the grower stage were recorded in birds fed the corn-based diets. At 24 d, pancreatic chymotrypsin amidase and lipase enzymes were significantly (P < 0.01) more active in chickens fed the wheat-based diet. The interaction of PSP level and the type of the grain was significant (P < 0.01) for pancreatic chymotrypsin amidase and lipase as well as jejunal maltase (P < 0.05). Both experimental factors had a significant influence on jejunum histomorphology at 24 d of age (P < 0.001). There was a significant interaction between level of PSP and the type of grain (P < 0.05) resulting in the highest villus surface areas being seen for birds fed the corn-based diet and receiving the medium level of PSP. The trial demonstrated that PSP supplement can be included at between 50 and 100 g/kg of starter diets, depending on the basal diet.

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