Nhu cầu Lysine của gà thịt tăng trưởng chậm giai đoạn từ 1 đến 21 ngày tuổi

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Tác giả: Thúy Hằng Hồ, Hồng Định Trần

Ngôn ngữ: Vie

Ký hiệu phân loại:

Thông tin xuất bản: Khoa học kỹ thuật chăn nuôi 2022

Mô tả vật lý: 51 - 57

Bộ sưu tập: Metadata

ID: 409439

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Nghiên cứu này được thực hiện để xác định nhu cầu lysine cho gà thịt tăng trưởng chậm từ 1 đến 21 ngày tuổi. Thí nghiệm được thực hiện từ tháng 9/2017 đến tháng 3/2018 tại Suranaree University of Technology, Thái Lan. Tổng số 540 con gà Korat một ngày tuổi được bố trí ngẫu nhiên vào 5 nghiệm thức khẩu phần với 6 lần lặp lại (18 con/ đơn vị thí nghiệm) trong bố trí hoàn toàn ngẫu nhiên. Gà thí nghiệm được cho ăn 5 mức độ lysine tổng số là 0,99
1,09
1,19
1,29 và 1,39% (0,87
0,97
1,07
1,17 và 1,27% lysine tiêu hóa). Kết quả cho thấy, gà Korat có phản ứng đáng kể (P<
0,05) với các mức độ lysine khẩu phần khác nhau trong các chỉ tiêu được đo lường như tăng khối lượng cơ thể, hệ số chuyển hóa thức ăn, axit uric trong huyết tương trong khi sự thay đổi lượng lysine khẩu phần không ảnh hưởng đến lượng thức ăn ăn vào của gà Korat. Nhu cầu lysine được xác định bằng cách sử dụng "Broken-line regression analysis" cho tăng khối lượng cơ thể, hệ số chuyển hóa thức ăn, axit uric lần lượt là 1,20
1,15
1,24% lysine tổng số hay 1,08
1,03
1,12% lysine tiêu hóa. Kết luận, nhu cầu lysine tổng số cho gà Korat là 1,20% (1,08% lysine tiêu hóa) dựa trên trung bình các tiêu chí được đo lường., Tóm tắt tiếng anh, This study was conducted to estimate the lysine requirement of Korat chickens from 1 to 21 d-old. The experiment was done from September 2017 to March 2018 at Suranaree University of Technology, Thailand. A total of 540 chickens were randomly arranged to five dietary treatments with 6 replicates (18 birds per unit) in a completely randomized design. Experimental birds were fed 5 levels of total lysine: 0.99, 1.09, 1.19, 1.29, and 1.39% (0.87, 0.97, 1.07, 1.17, and 1.27% digestible lysine). The results showed that the Korat chickens exhibited significant (P <
0.05) responses to dietary lysine levels in body weight gain, feed conversion ratio, uric acid in plasma while the alteration of dietary lysine content did not affect feed intake of Korat chickens. The estimates of total lysine requirements using the broken-line regression analysis for body weight gain, feed conversion ratio, and uric acid were 1.20, 1.15, and 1.24% (1.08, 1.03, and 1.12% digestible lysine), respectively. In conclusion, the estimated lysine requirements for Korat chickens were 1.20% total lysine or 1.08% digestible lysine based on the averages of measured criteria.

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