EFFECT OF SUPPLEMENTED RUMEN PROTECTED METHIONINE AND/OR CHOLINE ON PERFORMANCE OF ZARAIBI GOATS: 1. PRODUCTIVE PERFORMANCE OF LACTATING GOATS | ||||
| Journal of Animal and Poultry Production | ||||
| Article 1, Volume 4, Issue 2, February 2013, Page 57-67 PDF (537.11 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2013.71008 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
M. E. El-Gendy* ; K. F. El-Riedy; Hanaa S. Sakr; H. M. Gaafar 
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| Animal Production Research Institute, Agricultural Research Cemter, Dokki, Giza. | ||||
| Abstract | ||||
| Forty Zaraibi goats with average body weight of 34.64±0.79 kg and 3-4 years old were divided into four similar groups (10 in each). The goats were fed from the last two months of pregnancy till the fifth month of lactation the basal ration containing 0.8 kg concentrate feed mixture, 0.2 kg barley grain and 5.0 kg berseem without additive (control) or with 2 g/head/day rumen protected methionine (RPM) or 2 g/head/day rumen protected choline (RPC) or 2 g/head/day RPM + 2 g/head/day RPC (RPM+RPC). Results show that average daily dry matter intake (DMI) by goats was nearly similar for the different groups. The RPM+RPC group showed significantly (P<0.05) the highest digestibility coefficients and nutritive values followed by RPM and RPC groups, while the control group had the lowest values. Milk yield increased by 19.36, 12.62 and 31.31% for RPM, RPC and RPM+RPC groups, respectively. The RPM+RPC group showed significantly (P<0.05) higher milk composition. Milk yield was increased with the progress of lactation from 1st to 2nd month and decreased thereafter, while milk composition showed the opposite trend. Rumen protected methionine and/or choline additives increased significantly (P<0.05) body weight of goats during the different periods compared to control group. The concentrations of total protein, albumin and globulin in blood serum were significantly (P<0.05) the higher in RPM+RPC group. The total DM intake and total feed cost were nearly the same for the different groups. The RPM+RPC group showed significantly (P<0.05) higher total TDN and DCP intakes and lower amounts of DM, TDN and DCP required per kg milk. The RPM+RPC group recorded significantly (P<0.05) higher total and net revenue and net revenue improvement. The net revenue for RPM, RPC and RPM+RPC increased by 32.27, 21.75 and 53.19% compared to control group, respectively. | ||||
| Keywords | ||||
| goats; protected methionine; choline; digestibility; milk yield; composition | ||||
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