Kraiprom Thaintip, Jantarat Sitthisak, Yaemkong Suphawadee, Laorodphan Narakamol, Wichasit Nithat, Khan Muhammad, Mauck John, Loor Juan J, Incharoen Tossaporn
Faculty of Science and Technology, Prince of Songkla University, Pattani 94000, Thailand.
Faculty of Food and Agricultural Technology, Pibulsongkram Rajabhat University, Phitsanulok 65000, Thailand.
Vet Med Int. 2024 Mar 2;2024:7441866. doi: 10.1155/2024/7441866. eCollection 2024.
This study aimed to evaluate whether total replacement of soybean meal (SBM) with sundried soymilk residue (SSR) in a total mixed ration (TMR) affects intake, digestibility, milk production, and blood metabolites in dairy goats. A total of 12 healthy Saanen dairy goats (40.12 ± 5.80 kg of BW) in midlactation (31.23 ± 10.12 days) were used in a randomized complete design ( = 4 goats/group). Dietary treatments were based on a TMR as follows: control TMR without SSR (CON) or SBM-based TMR with 50% or 100% of SSR replacing SBM (SSR-50 and SSR-100, respectively). All goats had ad libitum access to feed and clean water throughout the experiment. The dry matter (DM) intake decreased ( < 0.05) with the increasing replacement ratio of SBM and was lowest in the SSR-100 group. Similarly, organic matter (OM) digestibility was lowest ( < 0.05) in the SSR-100 group. However, the digestibility of DM, CP, NDF, and ADF did not change ( > 0.05) by dietary treatments. Compared with CON, the milk yield decreased significantly ( < 0.05) with increasing replacement ratio of SBM. In contrast, milk composition such as total solids, solids-not-fat, milk fat, lactose, protein, and pH were not influenced ( > 0.05) by feeding dietary SSR. Compared with other treatments, blood glucose concentration was lower ( < 0.05) in the SSR-100 group. In contrast, packed cell volume, glucose, and plasma urea nitrogen concentrations did not differ ( > 0.05). The results indicated that SSR could replace SBM in a TMR at less than 50%. Thus, the present study provides support for further investigation to enhance the utilization of soybean waste as an alternative protein source in the TMR for dairy goats and potentially other ruminants.
本研究旨在评估在全混合日粮（TMR）中用晒干的豆浆渣（SSR）完全替代豆粕（SBM）是否会影响奶山羊的采食量、消化率、产奶量和血液代谢产物。选用12只健康的处于泌乳中期（31.23±10.12天）的萨能奶山羊（体重40.12±5.80千克），采用随机完全设计（每组4只山羊）。日粮处理基于以下TMR：不添加SSR的对照TMR（CON），或用50%或100%的SSR替代SBM的以SBM为基础的TMR（分别为SSR - 50和SSR - 100）。在整个实验过程中，所有山羊均可自由采食饲料和饮用清洁水。随着SBM替代比例的增加，干物质（DM）采食量降低（P<0.05），且在SSR - 100组中最低。同样，SSR - 100组的有机物（OM）消化率最低（P<0.05）。然而，日粮处理对DM、粗蛋白（CP）、中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）的消化率没有影响（P>0.05）。与CON相比，随着SBM替代比例的增加，产奶量显著降低（P<0.05）。相反，饲喂日粮SSR对总固体、非脂固体、乳脂肪、乳糖、蛋白质和pH等乳成分没有影响（P>0.05）。与其他处理相比，SSR - 100组的血糖浓度较低（P<0.05）。相反，红细胞压积、血糖和血浆尿素氮浓度没有差异（P>0.05）。结果表明，SSR可以在TMR中以低于50%的比例替代SBM。因此，本研究为进一步研究提高大豆废弃物作为奶山羊及潜在其他反刍动物TMR中替代蛋白质来源的利用率提供了支持。
