| Abstrakt: |
To cover a shortage of animal food in arid regions in Egypt, this investigation has been carried out to compare the consequences of using ammoniated rice straw (ARS) with different proportions of tree foliage leaves (Cassava, CA; Acacia saligna, AS; and Acacia neloitca, AN) on ruminal fermentation and sheep performance. The superior six formulations of pastoral lime mixtures from CA and Acacia with ARS were selected according to chemical compositions and IVDMD values from among 72 formulations, which were tested in vitro. Thirty five growing Barki male lambs four months old and weighed 20.16±0.11 kg were divided into seven groups(5 each); T0: 40% concentrate feed mixture (CFM) + 60% ARS and served as control, T1: 40% CFM + 30% ARS + 30% CA, T2: 40% CFM + 30% ARS + 30% AS, T3: 40% CFM + 30% ARS + 30% AN; T4: 40% CFM + 30% ARS + 15% CA + 15% AS, T5: 40% CFM + 30% ARS + 15% CA + 15% AN, and T6: 40% CFM + 30% ARS + 15% AS + 15% AN. Protein content was higher in CA (22.22%) compared to AS (16.67%) and AN (15.99%). ADF and NDF content in CA was the lowest. T1 and T2 showed the lowest potential ruminal gas and methane production than T4 and T5. T4, T5, and T6 improved (P < 0.05) the degradability of DM, OM, and NDF, while reduced condensed tannins (CT) levels and increased ammonia-N, short-chain fatty acids, microbial protein, and bacterial count. No influence of various treatments on pH, protozoa count, butyric, and propionic acid. T3 group showed an increase in lambs'performance compared with the other groups.It could be concluded that the use of feed mixtures of tanninrich foliage and ammoniated rice foddercan used as a partial substitute for ARS andmay help in cover the scarcity of forage resources and resolve the negative effects of CT and reduce the methane released. [ABSTRACT FROM AUTHOR] |
