L‐aspartic acid and urea supplementation of low‐protein layer diets1

Kagan, Albert; Balloun, S. L.

doi:10.1080/00071667608416290

Cited by 2 publications

(1 citation statement)

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“…This failure was also apparent even at low doses of dietary urea (group I) used in the present work. Previous studies (Korregoy et al, 1970;Kagan and Balloun, 1976a;Okumura et al, 1976Okumura et al, , 1979 pointed to inability of chickens to utilize dietary urea in synthesis of amino acids. Urea as a dietary component provides no energy, minerals or vitamins (Loosli and McDonald, 1968).…”

Section: Discussionmentioning

confidence: 99%

Toxo-pathological effects induced by urea in broiler chicks

Abdou

Mubarak

Sharkawy

2006

Journal of Veterinary Medical Research

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Sixty, day-old, chicks were reared up to 3 weeks of age and then randomly divided into 4 equal groups (3 treated and one control group). Urea (46 % nitrogen) was added to the grower-finisher ration of the treated birds at levels of 1% , 3% and 5% (groups I, II & III respectively). Feed and water were available ad libitum for all birds over the time of experiment. At days 7, 20 and 30 post exposure, 5 birds from each group were weighed, bled and sacrificed. All birds spontaneously died during the experiment were also necropsied. Haematological parameters (RBCs, WBCs counts, PCV and Hb), biochemical variables [urea, glucose, uric acid, alkaline phosphatase; (ALP) and lactate dehydrogenase; (LDH)] and body weight gain were assessed. The encountered pathological changes were described. The obtained results indicated that: (1) decrease in RBCs, WBCs counts, PCV and Hb, (2) increase in ALP, LDH, urea and uric acid, while glucose level was decreased. (3) decrease in body weight gain in all treated birds. There were significant pathological changes in kidneys, heart, liver and lungs of the treated birds. It was concluded that addition of urea to poultry feeds to replace the more expensive protein-nitrogen has serious consequences which affect the health condition and weight gain of birds.

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Section: Discussionmentioning

confidence: 99%