Amino acid requirements of poultry. A review.

Ishibashi, Teru

doi:10.2141/jpsa.27.1

Cited by 7 publications

(4 citation statements)

References 108 publications

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“…Because the feed intake was controlled primarily by energy needs of animals, it has been observed that feed intake decreased with increasing dietary ME levels, as observed by HILL and DANSKY (1954), GROVER et al (1972), FARRELL et al (1973) and ISHIBASHI (1990. In the present study, however, the feed intake was not affected by dietary ME levels.…”

Section: Discussionsupporting

confidence: 60%

Effects of Dietary Amino Acid and Metabolizable Energy Levels on Performance of Native Chicken, Hinai-dori.

1994

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Section: Discussionsupporting

confidence: 60%

Effects of Dietary Amino Acid and Metabolizable Energy Levels on Performance of Native Chicken, Hinai-dori.

1994

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“…In the feeding standards, only one pattern of amino acid requirement is shown. However, the amino acid requirements of laying hens are affected by various factors such as genetic, environmental, physical, and managing factors (Ishibashi 1990). The genetic, environmental and managing factors are not so large among present stocks (Pobrow & Morris 1974).…”

Section: Amino Acid Requirements Of Laying Hensmentioning

confidence: 99%

“…The requirements of CP and amino acids are not constant and are affected by many factors (Ishibashi 1990). Among these are management factors; environmental temperature, housing style (cage or floor pens), feeding space per hens, feeders, whether or not the hens are properly debeaked, degree of crowding of hens in pens, supply of drinking water, disease level in the flock and physical and genetic factors; size and breed of hen, and dietary factors; energy content of diets and relationship among amino acids, such as antagonism and imbalance.…”

Section: Amino Acid Requirements Of Laying Hensmentioning

confidence: 99%

Amino acid nutrition in egg production industry

Ishibashi¹,

Yonemochi²

2003

Animal Science Journal

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The egg production industry is facing various problems that need to be solved. For amino acid nutrition to achieve scientific and economical feeding of laying hens, it is necessary to elucidate the content, digestibility, or availability of nutrients of feedstuffs and feeds and the requirement of amino acids for laying hens. In addition, improvement to quality of eggs and meat of spent hens, methods of management and development of new feedstuffs are essential. For sustainable animal production, decrease in excreta and animal welfare should be studied. The real‐time determination of content and digestibility of amino acids in feedstuffs are essential for formation of feeds. Recent advances in the near infrared reflectance analysis will be able to determine the content, digestibility and availability of nutrients in feedstuffs and feeds, if we have a supplemental amount of conventional analysis to define the calibration population. The amino acid requirements are affected by various factors. Therefore the method to quickly and exactly determine amino acid requirements in response to various factors is necessary. By using plasma free amino acid concentration as a criterion, it is possible to determine amino acid requirements in various conditions of laying hens within a short experimental period, repeatedly using the same animals. Because the amino acid requirements differ among individual animals, it should be expressed as grams per hen per day. Practically, it is impossible to formulate various feeds for individual hens. The various expressions have been developed and these expressions have advantages and disadvantages. The nitrogen excretion of laying hens is easily reduced by reducing dietary nitrogen levels and restricting the feed intake. The availability of amino acid may be improved by feeding management, and supplementing enzyme, but the quality of eggs and meat of spent hens and welfare of laying hens are not affected by amino acid nutrition.

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“…In Feeding Standards for Horses by the NRC [10] and Japanese Feeding Standard for Horses [1], no data on requirements of amino acids except Lys for growth and maintenance are shown. Because amino acid requirements are affected by various factors, such as environmental, physiological and dietary conditions [6], it is necessary to repeat many experiments to determine requirements of all amino acids for horses under various conditions affecting amino acid requirements.…”

mentioning

confidence: 99%