Taboada E, Mendez J, de Blas J C
COREN SCL, Orense, Spain.
Reprod Nutr Dev. 1996;36(2):191-203. doi: 10.1051/rnd:19960204.
This study investigated the sulphur amino acid (SAA) requirements of rabbits. Five diets, containing 0.48-0.72% crude SAA, were formulated by supplementing a basal diet with DL-methionine. The apparent methionine digestibility (%) was 71.4 +/- 1.1 in the basal diet and 102.9 +/- 0.9 for DL-methionine, as estimated by the difference method. Feeding trials were carried out using 370 rabbit does and 1 195 weanling rabbits slaughtered at 2-2.1 kg body weight. Milk production was measured in 80 lactations. Carcass traits were determined in 125 rabbits. The dietary SAA content affected several productive traits, such as milk production, parturition interval, growth rate, carcass quality and feed efficiency. When the diets were compared using orthogonal contrasts, a minimum requirement of 0.54% crude or 0.40% digestible SAA was determined. Further responses in performance were observed, however, when the data were analysed by regression methods. The values of crude and digestible SAA for optimal production were, respectively, 0.63 and 0.49% (rabbit does) and, at least, 0.72 and 0.58% (growing rabbits).
本研究调查了家兔对含硫氨基酸（SAA）的需求。通过在基础日粮中添加DL-蛋氨酸配制了5种粗SAA含量为0.48 - 0.72%的日粮。采用差值法估算，基础日粮中蛋氨酸的表观消化率（%）为71.4±1.1，DL-蛋氨酸为102.9±0.9。使用370只母兔和1195只体重达2 - 2.1千克时屠宰的断奶仔兔进行饲养试验。测定了80次泌乳期的产奶量。在125只家兔身上测定了胴体性状。日粮SAA含量影响了多个生产性状，如产奶量、产仔间隔、生长速度、胴体品质和饲料效率。当使用正交对比法比较日粮时，确定粗SAA的最低需求量为0.54%，可消化SAA为0.40%。然而，当用回归分析法分析数据时，观察到生产性能有进一步的反应。家兔产奶量最佳时粗SAA和可消化SAA的值分别为0.63%和0.49%，生长兔至少分别为0.72%和0.58%。
