Institute of Animal Nutrition and Feed Science, Key Lab of Animal Genetics, Breeding and Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University, Guiyang, 550025, China.
College of Animal Science and Technology and Veterinary Medicine, Zhejiang Agriculture and Forest University, Hangzhou, 311300, China.
Trop Anim Health Prod. 2024 Oct 12;56(8):340. doi: 10.1007/s11250-024-04115-7.
Rosa roxburghii tratt residue (RRTR) is a regional and uncommon byproduct in Guizhou. Little information is available on whether RRTR can be used as feed for ruminants. In this study, the feasibility of using RRTR as a new feed resource for cattle was investigated by chemical composition analysis, in vitro gas production (Trial 1) and animal feeding experiments (Trial 2). In trial 1, compared to the commonly used fruit residues, RRTR had a proximate nutrient level; the in vitro gas production curve and dynamics fell within the normal range. In trial 2, 16 cattle were allocated to the control and treatment groups, with 8 replicates of 1 cattle each. Cattle in the control group were fed a basal diet without RRTR, while those in the treatment group were fed a diet containing 30% RRTR to replace 30% whole corn silage in basal diet. Feeding RRTR had little effect on the growth performance of the control and treatment cattle (P > 0.05). The feed-to-gain ratio was greater in the treatment group than in the control group throughout the trial period (P < 0.05). The plasma urea levels in the treatment group were lower (P < 0.05) than that in control group, and the levels of other plasma biochemical metabolites were not different between the two groups of cattle (P > 0.05). The in vivo rumen fermentation parameters did not differ between the control and treatment groups (P > 0.05). Our findings indicate that RRTR has a nutritional profile (crude protein, neutral detergent fiber, acid detergent fiber, and crude fiber) similar to that of commonly used fruit residues (such as apple, pineapple, and citrus residue et al.); improves plasma protein utilization efficiency; and has no negative impact on growth performance, albeit with limited effects on feed conversion; blood metabolites, and rumen fermentation parameters in cattle. Accordingly, we conclude, based on the above-mentioned result, that RRTR can serve as a novel feed alternative resource when considering the affordability and as a practical choice for low-cost diets for cattle.
罗田瑞香渣（RRTR）是贵州地区一种常见的副产品。关于 RRTR 是否可作为反刍动物饲料的信息较少。本研究通过化学组成分析、体外产气量（试验 1）和动物饲养试验（试验 2）来评估 RRTR 作为新型牛饲料资源的可行性。在试验 1 中，与常用的水果渣相比，RRTR 具有近似的营养水平；体外产气量曲线和动力学均处于正常范围。在试验 2 中，16 头牛被分为对照组和处理组，每组 8 个重复，每个重复 1 头牛。对照组牛饲喂不含 RRTR 的基础日粮，处理组牛饲喂含 30%RRTR 的日粮，以替代基础日粮中 30%的全玉米青贮。饲喂 RRTR 对对照组和处理组牛的生长性能影响不大（P＞0.05）。整个试验期间，处理组的料重比均高于对照组（P＜0.05）。处理组的血浆尿素水平低于对照组（P＜0.05），两组牛的其他血浆生化代谢物水平无差异（P＞0.05）。对照组和处理组牛的体内瘤胃发酵参数无差异（P＞0.05）。研究结果表明，RRTR 的营养成分（粗蛋白、中性洗涤纤维、酸性洗涤纤维和粗灰分）与常用水果渣（如苹果、菠萝和柑橘渣等）相似；提高了血浆蛋白的利用效率；对生长性能没有负面影响，但对饲料转化率、血液代谢物和瘤胃发酵参数的影响有限。因此，根据上述结果，RRTR 可以作为一种新型的饲料替代资源，考虑到其可负担性和作为低成本牛饲料的实际选择。
