Nutrient use in chicks during the first week posthatch

Poultry Science
Y Noy, D Sklan

Abstract

We examined effects of feeding chicks differing levels of macronutrients on performance during the first 7 d posthatch in this study. Four experiments were conducted using male Ross x Ross broiler chicks. The first experiment examined, in a 3 x 3 factorial design, the effect of feeding fat at 3, 7, and 11% and protein at 18, 23, and 28%. With increasing protein and fat levels feed intake and BW decreased. The second experiment examined, in a 3 x 2 factorial design, the effect of fat at 3, 7, and 10% and cellulose at 3 and 13%. Increasing fat in the diet decreased feed intake at both cellulose levels with little effect on BW. High cellulose decreased feed intake and BW. Experiment 3 examined, in a 3 x 2 factorial design, the effect of protein at 19, 23, and 27% and cellulose at 3 and 13%. Increasing protein levels decreased feed intake with little effect on BW. Cellulose decreased feed intake as levels increased. The fourth experiment examined, in a 4 x 2 factorial, the effect of feeding protein at 19, 21, 23, and 25% and fat at 4.5 and 9%, for 1 wk followed by standard diets through marketing. Significant differences in feed intake, BW and feed efficiency were observed at 7 d, but by 18 d differences were not significant and by...Continue Reading

Citations

Nov 13, 2009·Journal of Animal Physiology and Animal Nutrition·Q SwennenJ Buyse
May 1, 2007·Animal : an International Journal of Animal Bioscience·D BastianelliS Tesseraud
Sep 25, 2017·Poultry Science·Guoqing WangElizabeth R Gilbert
Dec 19, 2019·Animals : an Open Access Journal From MDPI·Diego Pereira NevesIrenilza de Alencar Nääs
Jun 17, 2021·Journal of Zoo and Wildlife Medicine : Official Publication of the American Association of Zoo Veterinarians·Eleanor L TaylorStamatios A Tahas

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