de Blas J C, Taboada E, Mateos G G, Nicodemus N, Méndez J
Departamento de Producción Animal, Universidad Politécnica, Madrid, Spain.
J Anim Sci. 1995 Apr;73(4):1131-7. doi: 10.2527/1995.7341131x.
The optimal level of starch in diets for rabbit does was investigated. Five isoenergetic and isoproteic diets containing 26.6, 24.6, 19.0, 16.8, or 13.0% starch and 31.2, 33.4, 36.0, or 41.2% NDF, respectively (DM basis), were made by substitution of starch for NDF and fat. The effect of diet on nutrient digestibility was determined in fattening and nonlactating and lactating adult does using a total of 105 rabbits. Increasing dietary starch content linearly increased (P < .001) DM, GE, CP (P = .07), and starch digestibilities but decreased (P < .001) NDF digestibility. Nutrient digestibility was higher (P < .05), except for CP, in adult does than in fattening rabbits. Dry matter and GE digestibilities were higher (P = .08) for nonlactating than for lactating does. A lactation trial using 440 rabbit does was conducted over a 6-mo experimental period. Milk production and milk composition were measured in 70 lactations. A decrease in dietary starch content did not improve pup mortality before weaning but impaired (linear, P < .001) dry feed intake and pup growth from 21 d until weaning. Diet did not influence does' feed intake, milk DM, ether extract, and CP contents or prolificacy. However, diet had quadratic effects on milk production (P = .15), milk lactose content (P = .07), parturition interval (P = .02), and feed conversion efficiency (P = .02), expressed both per weight or number of pups weaned. Optimal values were reached for dietary starch and NDF contents at approximately 20 and 35.5% (DM basis), respectively.(ABSTRACT TRUNCATED AT 250 WORDS)
研究了兔日粮中淀粉的最佳水平。通过用淀粉替代中性洗涤纤维（NDF）和脂肪，配制了五种等能量、等蛋白日粮，其淀粉含量分别为26.6%、24.6%、19.0%、16.8%或13.0%，NDF含量分别为31.2%、33.4%、36.0%或41.2%（干物质基础）。使用总共105只兔子，测定了日粮对育肥期、非泌乳期和泌乳期成年母兔营养物质消化率的影响。日粮淀粉含量增加使干物质、总能、粗蛋白（P = 0.07）和淀粉消化率呈线性增加（P < 0.001），但使NDF消化率降低（P < 0.001）。除粗蛋白外，成年母兔的营养物质消化率高于育肥兔（P < 0.05）。非泌乳母兔的干物质和总能消化率高于泌乳母兔（P = 0.08）。在为期6个月的试验期内，对440只母兔进行了泌乳试验。测定了70次泌乳的产奶量和乳成分。日粮淀粉含量降低并未改善断奶前仔兔死亡率，但损害了（线性，P < 0.001）从21日龄到断奶的干饲料摄入量和仔兔生长。日粮对母兔采食量、乳干物质、乙醚提取物、粗蛋白含量或繁殖力无影响。然而，日粮对产奶量（P = 0.15）、乳糖含量（P = 0.07）、产仔间隔（P = 0.02）和饲料转化效率（P = 0.02）有二次效应，均以断奶仔兔体重或数量表示。日粮淀粉和NDF含量分别约为20%和35.5%（干物质基础）时达到最佳值。（摘要截短至250字）
