The Effects of Partial or Total Replacement of Maize Silage by Panicum maximum Silage in Lactating Cows Rations on Ruminal Fermentation, Digestibility and Methane Production | ||||
| Egyptian Journal of Veterinary Sciences | ||||
| Volume 56, Issue 6, June 2025, Page 1271-1280 PDF (1.03 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejvs.2024.285561.2041 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
haiam abd elsalam said  1; ayman hassan1; Mohamed Helmy Yacout2; mohamed khalil1; alla aledin el-badawi3; amr shwerab1; abdelfattah salem4
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| 1animal production research institute | ||||
| 2Animal Production Research Institute, Agricultural Research Center, Dokki, Giza, Egypt. | ||||
| 3national research center | ||||
| 4department of animal production , faculty of agriculture , Alexandria university | ||||
| Abstract | ||||
| Five total mixed rations (TMR) were formulated to evaluate the influence of partial total replacement of maize silage (MS) with Panicum maximum silage (PS) on digestibility, rumen fermentation and milk yield of cows. The experimental rations were TMR contained 100% Maize silage (MS, T1); TMR with 75% MS + 25% PS (T2); TMR with 50% MS + 50% PS (T 3); TMR with 25% MS + 75% PS (T 4) and TMR with 100% PS (R5). Milk yield was performed on fifty Friesian cows (10 cows per treatment) for three months. Rumen fermentation and gas production were determined with Barki rams. The results cleared that CP content of both silages were close together, but ash and NDF were higher for PS but lactic and acetic acids were high for MS. Gas production (GP) was lower for PS on both 24 and 48 h than MS. Meanwhile, both GP for soluble (a), insoluble (b) and the cumulative GP (y) were less with PS than MS, as well as DMD, OMD and SCFA. Rumen fermentation data showed higher NH3-N, less TVFA's and acetic with the increase of PS in the rations, while the control, R2 and R3 had more acetic compared to other rations. Rations contained 25 and 50 % of PS had more milk and 4% FCM yields, while the lowest milk yield was obtained by incorporating 100% PS in ration (R5). It could be advisable to PS replacing MS in ration up to 50% without any adverse effect on milk production. | ||||
| Keywords | ||||
| Panicum maximum silage; apparent digestibility; kinetics; rumen fermentation; milk yield | ||||
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