a Departamento de Genética , Faculdade de Medicina de Ribeirão Preto, Universidade de São Paulo , Ribeirão Preto , SP , Brazil.
Arch Anim Nutr. 2013;67(5):393-405. doi: 10.1080/1745039X.2013.834581. Epub 2013 Sep 9.
Because legumes are a very important feed source for ruminants, the aim of this study was to evaluate the ideal inclusion level of hay Arachis pintoi cv. Belmonte in sheep diets by measuring the dry matter intake (DMI), concentration of volatile fatty acids, ammonia-nitrogen concentration, ruminal pH and the in situ degradability of dry matter (DM) and crude protein (CP). In the experiment with four sheep, a 4 × 4 Latin Square design was used with four periods and four treatments (0%, 30%, 60% and 100% Arachis replacing grass hay). Significant interactions were observed between treatments and sampling times for ammonia-nitrogen and acetate, propionate and butyrate concentration and the acetate:propionate ratio. The ruminal pH and total volatile fatty acids concentration were not affected by interaction between treatments and sampling time. The degradation of DM and CP was similar, rising with the increasing content of Arachis, showing a linear effect. The treatment containing 60% of Arachis showed best results, with good levels of daily weight gain and higher ruminal concentrations of volatile fatty acids. The legume showed high levels of CP, high digestibility and appropriate levels of fibre, with excellent standards of degradation and ruminal characteristics. The use of the legume Arachis for ruminants is a promising option of nutrient supply to meet production demands of these animals.
由于豆类是反刍动物非常重要的饲料来源，因此本研究旨在通过测量干物质采食量（DMI）、挥发性脂肪酸浓度、氨氮浓度、瘤胃 pH 值以及干物质（DM）和粗蛋白（CP）的原位降解率来评估相思豆 hay Arachis pintoi cv. Belmonte 在绵羊日粮中的理想添加水平。在 4 只绵羊的实验中，采用 4×4 拉丁方设计，设 4 个时期和 4 个处理（0%、30%、60%和 100%Arachis 替代草干草）。氨氮和乙酸、丙酸和丁酸浓度以及乙酸：丙酸比的处理与采样时间之间存在显著的相互作用。瘤胃 pH 值和总挥发性脂肪酸浓度不受处理与采样时间之间相互作用的影响。DM 和 CP 的降解相似，随着 Arachis 含量的增加而增加，呈线性效应。含 60%Arachis 的处理表现最好，日增重水平良好，瘤胃挥发性脂肪酸浓度较高。这种豆科植物 CP 含量高，消化率高，纤维水平适当，具有良好的降解率和瘤胃特性标准。将豆科植物相思豆用于反刍动物是一种很有前途的营养供应选择，可以满足这些动物的生产需求。
