Ngalavu Asavela, Jiang Hailong, El-Ashram Saeed, Tellez-Isaias Guillermo, Farouk Mohammed Hamdy, Nyingwa Pakama Siphelele, Seidu Adams, Tyasi Thobela Louis
College of Animal Science and Technology, Jilin Agricultural University, Changchun 130118, China.
Jilin Provincial Key Lab of Animal Nutrition and Feed Science, Jilin Agricultural University, Changchun 130118, China.
Animals (Basel). 2020 Apr 13;10(4):674. doi: 10.3390/ani10040674.
Feed fiber composition is usually considered as one of the factors that have an impact on digestive tract microbiota composition. The investigations on the level of fermentation and in-vitro digestibility of different fibers are not well understood. The aim of the current study is to determine the effect of different fiber sources on intestinal nutrient digestibility, hindgut fermentation, and microbial community composition under in vitro conditions using pigs' hindgut as a model. The experimental treatment diets contained alfalfa hay, cornstalk, and rice straw. Cornstalk treatment displayed higher digestibility compared to alfalfa hay and rice straw; similar results were observed with in-vitro digestibility using intestinal digesta. were the most abundant phyla ( = 89.2%), and were the prominent genera (75.2%) in response to alfalfa compared to rice straw and cornstalk treatments. In simulated in-vitro digestion, corn stalk fiber improved dry matter digestibility; rice straw fiber improved volatile fatty acid content and fermentation efficiency. Alfalfa fiber improved the thickness of deposited and .
饲料纤维组成通常被认为是影响消化道微生物群组成的因素之一。关于不同纤维的发酵水平和体外消化率的研究还不太清楚。本研究的目的是使用猪的后肠作为模型，在体外条件下确定不同纤维来源对肠道营养物质消化率、后肠发酵和微生物群落组成的影响。实验处理日粮包含苜蓿干草、玉米秸秆和稻草。与苜蓿干草和稻草相比，玉米秸秆处理显示出更高的消化率；使用肠内容物进行体外消化率实验时也观察到了类似结果。与稻草和玉米秸秆处理相比，苜蓿处理中 是最丰富的门（占89.2%）， 是突出的属（占75.2%）。在模拟体外消化中，玉米秸秆纤维提高了干物质消化率；稻草纤维提高了挥发性脂肪酸含量和发酵效率。苜蓿纤维增加了 和 的沉积厚度。
