This study aimed to determine the protein and carbohydrate fractions as well as the in situ rumen degradability of Brachiaria decumbens silage (BDS) supplemented with soybean hulls. Five soybean hull inclusion levels were used: 0, 10, 20, 30, and 40% of the fresh matter of B. decumbens grass, distributed into a completely randomized design with five replications. The inclusion of soybean hulls caused a linear decrease (p < 0.001) in carbohydrate fractions A + B1 and a linear increase (p < 0.001) in carbohydrate fraction C. The percentage of non-protein nitrogen fraction increased linearly (p < 0.001), but the nitrogen fractions B₁ + B₂ and B₃ presented a negative quadratic effect (p < 0.01) with soybean hull level and fraction C presented a linear decrease (p < 0.001). The dry matter (DM) degradability of soluble fraction (A) and the undigestible DM decreased linearly (p < 0.01) with the soybean hull level. The potentially degradable water-insoluble portion (DM fraction B) and degradability rate (c) of the DM fraction B increased linearly (p < 0.001) with soybean hull level. The crude protein (CP) fraction A presented a linear increase (p < 0.001) with soybean hull inclusion; however, soybean hull levels caused a linear decrease (p < 0.001) in the CP level of fraction B. The degradable insoluble fraction of NDF (D) of the silage increased linearly (p < 0.001) and the indigestible NDF fraction of the silage was linearly decreased with the soybean hull level (p < 0.001). The inclusion of intermediate levels (20–30%) of soybean hulls provided better protein and carbohydrate fractions and better quality of BDS.

中文翻译：

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大豆农产副产物的消化潜能。

这项研究的目的是确定补充了大豆壳的臂形臂杆青贮饲料（BDS）的蛋白质和碳水化合物含量以及瘤胃的原位降解能力。使用了五个大豆壳包涵水平：枯草芽孢杆菌新鲜物质的0％，10％，20％，30％和40％，分布到完全随机的设计中，重复了五次。大豆壳的包含引起线性减小（p在碳水化合物的级分A + B1 <0.001）和线性增加（p在碳水化合物部分C.非蛋白氮级分的百分比线性增加<0.001）（p <0.001），但是氮分数B ₁ + B ₂和B ₃大豆皮水平呈现负二次效应（p <0.01），而C组分呈现线性下降（p <0.001）。可溶性级分（A）和不易消化的DM的干物质（DM）降解性随大豆壳水平线性降低（p <0.01）。潜在可降解的水不溶部分（DM组分B）和DM组分B的降解率（c ）随着大豆壳水平的增加而线性增加（p <0.001）。随着大豆皮的加入，粗蛋白（CP）组分A呈线性增加（p <0.001）。然而，大豆皮水平导致线性下降（pB部分的CP水平下<0.001）。青贮饲料中NDF（D）的可降解不溶部分线性增加（p <0.001），青贮饲料中不可消化的NDF随大豆壳水平线性减少（p <0.001） ）。中间水平（20–30％）的大豆皮的加入可提供更好的蛋白质和碳水化合物含量，并提供更好的BDS质量。