【摘要】 【目的】探明不同比例全株构树发酵饲料对猪生长性能与肉品质及免疫功能的影响，为利用构树降低饲养成本、提高养殖效益提供技术支撑。【方法】以三元杂交（大白、长白和杜洛克）育肥猪为研究对象，采用“全株构树+基础饲粮”厌氧发酵的方式制备全株构树发酵饲料，设置CK，基础饲粮；S₁，基础饲粮+10%全株构树；S₂，基础饲粮+20%全株构树；S₃，基础饲粮+30%全株构树；S₄，基础饲粮+40%全株构树，共5个处理，对比分析不同比例全株构树发酵饲料对猪生产性能与肉品质、免疫功能影响的差异。【结果】在10%～40%全株构树发酵饲料喂养下，猪的日增重降幅为28.56%～41.68%，干物质采食量降幅为32.81%～45.59%，屠宰率降幅为0.91%～5.74%，肌肉剪切力降幅为1.00%～44.34%，料重比降幅为3.75%～6.48%，肉色值增幅为4.27%～16.61%；不同比例全株构树发酵饲料对猪肌肉的单项氨基酸、必需氨基酸和非必需氨基酸无显著影响，但在10%、20%和30%全株构树发酵饲料喂养下，猪肉中总氨基酸含量分别比CK提高15.17%、8.43%和13.85%；此外，全株构树发酵饲料对肌肉反式脂肪酸有明显的下调作用。不同比例全株构树发酵饲料饲喂对猪空肠和脾脏中的IL-4和IFN-r因子均无显著影响，但免疫因子sIgA含量均有所提高；同时，可明显提高其肠道屏障中紧密连接蛋白ZO-1、Occludin和Claudin-1的基因相对表达量，以30%全株构树发酵饲料对猪肠道黏膜屏障功能的正面效应最优。【结论】10%～40%全株构树发酵饲料会降低育肥猪的生产性能，但可改善猪肉嫩度、肉色、肌肉脂肪酸组成和免疫功能，以30%的全株构树发酵饲料效果最优。更多还原

【Abstract】 【Objective】The effects of fermented Broussonetia papyrifera + basal diet feed with different proportions on growth performance, meat quality and immune function of finishing pigs were investigated to provide the technological support for reducing feeding cost and improving culture benefits.【Method】The fermented B. papyrifera feed was prepared by a “whole B. papyrifera plant + basal diet” anaerobic fermentation method. The differences in growth performance, meat quality and immune function of finishing pigs（YY×LL×DD） among 5 treatments of CK（basal diet）,S₁（basal diet + 10% B. papyrifera）, S₂（basal diet + 20% B. papyrifera）, S₃（basal diet + 30% B. papyrifera） and S₄（basal diet + 40% B. papyrifera） were comparatively analyzed.【Result】The daily gain, dry matter intake, slaughter rate,muscle shear force and feed to gain ratio of finishing pigs under 10%-40% fermented B. papyrifera feed conditions decreased by 28.56%-41.68%, 32.81%-45.59%, 0.91%-5.74%, 1.00%-44.34%, and 3.75%-6.48% compared with CK, respectively. The meat color value increased by 4.27%-16.61% compared with CK. The fermented B. papyrifera feed had no significant effects on single AA, essential AA and non-essential AA. Total AA content in pork muscle of S₁, S₂ and S₃ treatment increased by 15.17%, 8.43% and 13.85% compared with CK. In addition, the fermented B. papyrifera feed had a significant down-regulated effect on trans-fatty acids in pork muscle of finishing pigs. The fermented B. papyrifera feed had no significant effects on IL-4 and IFN-r factors in jejunum and spleen of finishing pigs but the sIgA content of immune factor was increased. The fermented B. papyrifera feed could increase the relative expression level of tight protein genes ZO-1, Occludin, and Claudin-1 in the intestinal barrier effectively and the positive effect of S₃ treatment on function of the intestinal mucosal barrier is the best.【Conclusion】The 10%-40% fermented B. papyrifera feed can reduce growth performance of finishing pigs but improve pork tenderness, meat color, muscle fatty acid composition and immune function of finishing pigs. The 30% fermented B. papyrifera feed has the best effects on growth performance, meat quality and immune function of finishing pigs.更多还原