Unidentified Growth Factors Required by Chicks and Poults

“…Vitamin supplements were added as shown at levels sufficient to meet or exceed recognized requirements without dependence on the crude feedstuffs in the diet. Fishmeal, dried whey, and dried brewers' yeast were employed to meet the needs of chicks for certain unidentified vitamins required for rapid early growth (Hill, 1948;Combs 1950;Heuser and Norris, Menge, Combs, Hsu and Shorb, 1952).…”

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confidence: 99%

Studies of the Energy Requirements of Chickens

1954

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T HE energy requirement of growing chicks has been studied in two widely different ways. One method is illustrated by the studies of Mitchell, Card and Hamilton (1931) who estimated the net energy requirements for maintenance and growth from the determination of basal metabolic rate and changes in body composition. Data of this kind have been of limited usefulness because of the lack until relatively recently of net energy values for poultry feedstuffs.The other method was used by Robertson, Miller and Heuser (1948) and Panda and Combs (1950). They studied the relationship between productive (net) energy of the ration and early growth rate to determine the minimum energy level per unit weight of the ration necessary to promote the maximum rate of growth. Both of these groups concluded that the minimum productive energy level required for maximum early growth rate was approximately 800-850 Calories per pound of ration on the basis of the productive energy values of poultry feedstuffs as reported by Fraps (1946). The experiments to be described in this paper were undertaken to obtain further information on the minimum dietary energy level necessary for maximum early growth rate of chicks. EXPERIMENTAL PROCEDUREAll of the experiments to be described

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“…Civcivlerde hızlı büyüme için biri karaciğer ve kurutulmuş bira mayasmda bulunan L-faktörü, diğeri peynil' suyu tozunda bulunan W-faktörü olmak üzere başlıca iki ayrı faktöre ihtiyac bulunduğu ortaya konulmuştur (10). Başka bir çalışmada ise kondanse balık öz suyunda bulunan F-faktörü ile peynil' suyunda bulunan W-faktörü-nün civcivlerde büyürneyi etkileyen başlıca büyüme faktörleri olduğu açıklanmıştır (4).…”

Section: Introductionunclassified

Bi̇tki̇sel Protei̇nlerle Beslenen Ci̇vci̇vlerde Büyüme Faktörü Olarak Süt Tozunun Etki̇si̇

H.;ERDİNÇ¹

1975

Ankara Üniversitesi Veteriner Fakültesi Dergisi

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Suınınaı-y:To study the effect on the growth of poultry, the frccze and dried and fincly powdered cow milk was fed to 60 one-day old chiekens for four weeks. The experimental animals were divided into three groups that composed of equal number of both sexes.The group one received normal feed that included the mineral and amino acids ofplant origin together with the fat, protein and row cellulose. The second group was fed the same [eed that alsa contained 3 % of powdered cow milk. The third group received the same feed as therirst group but supplemented with 3 % of cow milk that was previosly methanol extracted to remove the fat.The results show cd that the average body weight gain in females was around 75 g and the difference was statistically highly significant (p

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Unidentified Growth Factors Required by Chicks and Poults

Cited by 52 publications

References 23 publications

Unidentified Chick Growth Factors

Unidentified Chick Growth Factors

Studies of the Energy Requirements of Chickens

Bi̇tki̇sel Protei̇nlerle Beslenen Ci̇vci̇vlerde Büyüme Faktörü Olarak Süt Tozunun Etki̇si̇

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