Tăng khối lượng, tiêu hóa dưỡng chất và chất lượng quầy thịt của dê Bách Thảo

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Tác giả: Bình Trường Nguyễn, Thanh Trung Trương

Ngôn ngữ: Vie

Ký hiệu phân loại:

Thông tin xuất bản: Khoa học Kỹ thuật Chăn nuôi 2020

Mô tả vật lý: 29 - 34

Bộ sưu tập: Metadata

ID: 407093

Thêm vào giỏ Liên kết toàn văn

Nghiên cứu mức bổ sung CMS+ đến khả năng tiêu thụ, tiêu hóa dưỡng chất thức ăn (THDCTA) và tăng khối lượng (TKL) của 30 con dê BT với KL 11,1±0,86kg, được thực hiện tại Trại dễ Hải Triều, Trường Long Tây, Châu Thành A, Hậu Giang. Thí nghiệm được bố trí theo khối hoàn toàn ngẫu nhiên với 5 nghiệm thức (NT) là 5 mức bổ sung CMS+: 0% (CMS0), 2% (CMS2), 4% (CMS4), 6% (CMS6) và 8% (CMS8) theo DMI/ngày. Cỏ Voi cho ăn tự do ở tất cả các NT. Kết quả cho thấy, lượng chất khô tiêu thụ 425-431 CDM (P<
0,05). Đạm thổ tiêu thụ của CMS6 (69,3 g/con/ngày), cao hơn CMS0 và CMS2 (67,5 và 67,7 g/con/ngày) (P<
0,05), nhưng không có ý nghĩa so với CMS4 và CMS8 (68,8 và 69,8 g/con/ngày). Năng lượng trao đổi là 4,10-4,20 MJ/kgDM (P>
0,05) trong khi NDF giảm dần từ 249 xuống 230g tương ứng với CMS0 và CMS8 (P<
0,05). Tỷ lệ tiêu hóa DM, OM, CP, ADF và NDF tăng dần khi tăng mức CMS nhưng khác biệt không có ý nghĩa thống kê. Tỷ lệ tiêu hóa CP cao nhất ở CMS4 là 84,4% so với CMS0 là 80,6% (P>
0,05). Khi tăng CMS+ thì N tiêu thụ và N tích lũy cùng tăng dần 14,6-15,7 và 6,07-8,02 g/con/ngày (P<
0,05). Tăng khối lượng ở CMS4 (79,0 g/con/ ngày) cao hơn CMS0 (66,4 g/con/ngày) (P<
0,05), nhưng cao không có ý nghĩa so với CMS2, CMS6 và CMS8 là 74,9
75,1 và 69,8 g/con/ngày. Tỷ lệ thịt xẻ và thịt tinh cao ở CMS4 là 54,0 và 75,7% so với các NT (P>
0,05). Giá trị CP và EE của thịt là 21,7-22,2% và 1,83-2,20% (P>
0,05). Mức bổ sung CMS+ tăng dần thì KL tăng giúp dễ tiêu thụ và THDCTA tốt hơn. Tăng khối lượng ở mức bổ sung 4% là tốt nhất trên dê BT tại Hậu Giang., Tóm tắt tiếng anh, Thirty Bach Thao (BT) goats with weight of 11.1±0.86 kg were arranged in a randomized com-pletely block design with 5 treatments for studying the effects of different supplement levels of CMS+ in diets on feed utilization, nutrient digestibilities and daily weight gain was carried out in the experimental farm of Hai Trieu of Hau Giang province. Five treatments were five levels of CMS+ supplement in the diets at 0, 2, 4, 6 and 8% DMI/day corespoding to CMSO, CMS2, CMS4, CMS6 and CMS8 treatments. Elephant grass was fed ad libitum for all experimental goats. The results showed that DM of experiment about 425-431 gDM (P>
0,05). The CP intake of CMS6 (69.3 g/day) was higher significantly (P<
0.05) than that of CMSO and CMS2 (67.5 and 67.7 g/head/day, respectively) but similars with CMS4 and CMS8 (68.8 and 69.8 g/head/day). The dietary ME ranged 4.10-4.20 MJ/kgDM (P>
0,05) while NDF level in the diets decreased (P<
0.05) gradually from 249 to 230 g (CMSO and CMS8, respectively). The DM, OM, CP, ADF and NDF digestibilities increased by increasing CMS+ supplement levels in the diets but no significant (P>
0.05). However, CP dige stibility got the higher value (P>
0.05) at the CMS4 treatments (84.4%) compare to CMSO treatment (80.6%). The N intake and N retention increase (P<
0.05) by increasing dietary CMS supplement le-vels. Daily weight gain of experimental goats was significantly different (P<
0.05) among treatments with the higher values for the CMS4 compare to CMSO (79.0 vs 66.4 g/head/day, respectively). The percentage of carcass and lean meat of CMS4 treatment (54.0% and 75.7%, respectively) were higher (P>
0.05) than the others treatment. The CP and EE of experimental goat meat ranged 21.7-22.2% and 1.83-2.20%, respectively (P>
0.05). In conclusion, CMS+ supplement levels at 4% DMI in the diets increased feed and nutrient intakes and digestibilities on BT goats.

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