Improvement of the nutritional quality of Egyptian and Sudanese sorghum grains by the addition of phosphates

Abstract

1. Male broilers (0 to 35 d) were given foods with two types of yellow sorghum substituted for maize in isonutrient diets. Sorghum-based foods were also supplemented with extra phosphorus, to provide a total P of about 8 g/kg; the P being from either orthophosphoric acid or food grade dicalcium phosphate. 2. Both sorghums depressed growth and food:gain ratio and increased the incidence of locomotor disorder to about 0.50 (maize control = 0). Sorghum from Sudan, with higher concentrations of both tannin and phytate, caused more severe anti-nutritive effects than sorghum from Egypt. 3. Within the limits of statistical significance the growth depressing effect of sorghum was completely reversed by extra P. With the more toxic Sudanese sorghum this amelioration was numerically less than complete (growth = 0.94, maize control = 1). Locomotor disorders were also virtually, but not completely, eliminated by phosphorus treatment. 4. Treatment of sorghum by dry-mixing with dicalcium phosphate could form the basis of a simple and economic method for extending the use of high-tannin sorghum in poultry foods. The mode of action of the treatment remains to be determined.

Effects of the Hydrolysable Oak Tannins on the Quail Performance

“…On the other hand supplementation of oak tannin decreased the feed intake. This result is consistent with findings of Ibrahim et al (1988), Nyachoti et al (1997), Trevino et al (1992), Vilarino et al (2009), Mahmood et al (2008.…”

“…As can be seen from Table2 quails fed with diets including oak tannin had considerably low FiBW. These results are in agreement with findings of Ibrahim et al, 1988;Nyachoti et al, 1997;Trevino et al, 1992;Vilarino et al, 2009;Mahmood et al, 2008. As can be seen from Table 2, BWG, FI ranged from 99.48 to 168.90 and 516.75 to 680.08 g with the highest BWG and FI for quails fed with control diet. BWG and FI decreased with increasing dose of oak supplementation whereas FCR increased with increased oak supplementation.…”

Sorghum grain in poultry feeding

“…However, they obtained better results by adding phosphoric acid. Based on this, Ibrahim et al (1988) compared the addition of phosphoric acid with that of dicalcium phosphate to diets containing the same varieties of sorghum. Both treatments almost completely eliminated the leg abnormalities found in -50% chicks fed on sorghum.…”

Uso De Sorgo Com Baixo Teor Em Taninos Na Alimentação De Frangos De Corte

“…A utilização de sorgo com alto teor em tanino na dieta de frangos de corte é desvantajosa por diminuir o ganho de peso e piorar a conversão alimentar, além de reduzir o consumo, quando comparado ao milho e ao sorgo de baixo teor de tanino (ROSTAGNO et al, 1973;OLIVETTI;RAPACCINI, 1987;IBRAIHM et al 1988).…”