Ítavo Luís Carlos Vinhas, Gurgel Antonio Leandro Chaves, Ferreira Ítavo Camila Celeste Brandão, Cunha Camila Soares, Longhini Vanessa Zirondi, Difante Gelson Dos Santos, Dias Alexandre Menezes, Santana Juliana Caroline Santos, Arcanjo Angelo Herbet Moreira, Niwa Marcus Vinicius Garcia, Nonato Lucimara Modesto, Tadeu Dos Santos Geraldo, Chay-Canul Alfonso Juventino
College of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul, Campo Grande 79070-900, Brazil.
División Académica de Ciencias Agropecuarias, Universidad Juárez Autónoma de Tabasco, Villahermosa 86025, Mexico.
Animals (Basel). 2023 Nov 14;13(22):3515. doi: 10.3390/ani13223515.
Our objectives were to evaluate the use of cottonseed cake in replacing corn silage in a diet without forage and to identify the model with higher precision and accuracy of adjustment of parameters of ruminal degradation kinetics. A diet containing corn silage and another with cottonseed cake as a fiber source were formulated. Gompertz, Dual-pool Logistic, Brody, and Ørskov models were evaluated for goodness of fit to gas production. There were significant differences in dry matter (DM), organic matter (OM), and neutral detergent fiber (NDF) in the in vitro digestibility for diets and fiber sources. The estimated values of the Gompertz (6.77), Brody (6.72), and Ørskov (6.73) models were similar to the observed mean of gas production in the corn silage diet (6.73 mL/100 mg DM). Similarly, the estimated values of the Brody (5.87) and Ørskov (5.89) models were similar to the observed mean of gas production in the cottonseed cake diet (5.87 mL/100 mg DM). The roughage-free diet containing cottonseed cake as a fiber source stimulated higher gas production. Brody and Ørskov models presented higher precision and accuracy in the fitting of kinetics of degradation independent of the fiber source in the diet.
我们的目标是评估在无草料日粮中用棉籽饼替代玉米青贮饲料的效果，并确定瘤胃降解动力学参数调整精度和准确性更高的模型。配制了一种含玉米青贮饲料的日粮和另一种以棉籽饼为纤维来源的日粮。对Gompertz模型、双池逻辑模型、Brody模型和Ørskov模型的产气拟合优度进行了评估。日粮和纤维来源的体外消化率在干物质（DM）、有机物（OM）和中性洗涤纤维（NDF）方面存在显著差异。Gompertz模型（6.77）、Brody模型（6.72）和Ørskov模型（6.73）的估计值与玉米青贮饲料日粮中观察到的产气平均值（6.73 mL/100 mg DM）相似。同样，Brody模型（5.87）和Ørskov模型（5.89）的估计值与棉籽饼日粮中观察到的产气平均值（5.87 mL/100 mg DM）相似。以棉籽饼为纤维来源的无粗饲料日粮刺激了更高的产气。Brody模型和Ørskov模型在日粮中纤维来源无关的降解动力学拟合方面表现出更高的精度和准确性。
