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Abstract：
The experiment aimed to investigate the effects of plant polysaccharides combined with boric acid on digestive function, immune function and harmful gas and heavy metal contents in the faeces of fatteners. For this study, 90 healthy crossbred fatteners were selected and randomly divided into five groups: the control group was fed with a basal diet (Con); experimental group I was fed with basal diet + 40 mg/kg boric acid (BA); experimental group II was fed with basal diet + 40 mg/kg boric acid + 400 mg/kg Astragalus polysaccharides (BA+APS); experimental group III was fed with basal diet + 40 mg/kg boric acid + 200 mg/kg Ganoderma lucidum polysaccharides (BA+GLP); and experimental group IV was fed with basal diet + 40 mg/kg boric acid + 500 mg/kg Echinacea polysaccharides (BA+EPS). Compared with Con, the average daily gain (ADG), the trypsin activities in the duodenum and jejunum, the IL-2 levels in the spleen, the T-AOC activities and GSH-Px contents in the lymph node of fattening were increased in the BA group (p < 0.05), but malondialdehyde content in the lymph and spleen, and the contents of NH3, H2S, Hg, Cu, Fe and Zn in the feces and urine were decreased (p < 0.05). Compared with the BA, the ADG, gain-to-feed ratio (G/F), the trypsin and maltase activities in the duodenum and jejunum were increased in the BA+APS (p < 0.05), and the T-SOD activities in the spleen and T-AOC activities in the lymph node were also increased (p < 0.05), but the H2S level was decreased in the feces and urine (p < 0.05). Compared with the BA, the ADG, G/F and the trypsin and maltase activities in the duodenum were increased in the BA+GLP and BA+EPS (p < 0.05), the activities of maltase and lipase in the duodenum of fatteners in the BA+GLP and the activities of trypsin, maltase and lipase in the BA+EPS were increased (p < 0.05). Gathering everything together, our findings reveal that the combined addition of boric acid and plant polysaccharides in the diet of fatteners synergistically improved their growth performance and immune status. That may be achieved by regulating the activity of intestinal digestive enzymes, improving the antioxidant function and then promoting the digestion and absorption of nutrients. Furthermore, the above results reduce the emission of harmful gases and heavy metals in feces and urine.
摘要：
本试验旨在研究植物多糖与硼酸联用对消化功能的影响,育肥者的免疫功能和粪便中的有害气体和重金属含量。对于这项研究，选择90名健康杂种育肥者，随机分为五组：对照组饲喂基础饲粮（Con）；实验组I饲喂基础饲粮40mg/kg硼酸（BA）；实验组II饲喂基础饲粮40mg/kg硼酸400mg/kg黄芪多糖（BAAPS）；实验组III饲喂基础饲粮40mg/kg，并饲喂基础饲粮200mg。与Con相比，平均日收益(ADG)，十二指肠和空肠的胰蛋白酶活性，脾脏中的IL-2水平，BA组育肥淋巴结中T-AOC活性和GSH-Px含量升高（p<0.05），但淋巴和脾脏中的丙二醛含量，和NH3，H2S的含量，Hg,Cu,粪便和尿液中的铁和锌均降低（p<0.05）。与BA相比,ADG,增益进料比(G/F)，在BA+APS中，十二指肠和空肠中的胰蛋白酶和麦芽糖酶活性增加（p<0.05），脾脏中的T-SOD活性和淋巴结中的T-AOC活性也增加（p<0.05），但粪便和尿液中的H2S水平降低（p<0.05）。与BA相比,ADG,在BA+GLP和BA+EPS中,G/F和十二指肠胰蛋白酶和麦芽糖酶活性增加(p<0.05),BA+GLP中育肥者十二指肠中的麦芽糖酶和脂肪酶的活性以及胰蛋白酶的活性，BA+EPS中的麦芽糖酶和脂肪酶增加(p<0.05)。把一切聚集在一起，我们的发现表明，在育肥商的日粮中联合添加硼酸和植物多糖可协同改善其生长性能和免疫状态。这可以通过调节肠道消化酶的活性来实现，提高抗氧化功能，然后促进营养物质的消化和吸收。此外，上述结果减少了粪便和尿液中有害气体和重金属的排放。
