A Combination of Novel Microecological Agents and Molasses Role in Digestibility and Fermentation of Rice Straw by Facilitating the Ruminal Microbial Colonization

• DOI: 10.3389/fmicb.2022.948049
• Publication Date: 2022-07-14T02:34:38Z
• Authors: Yulin Ma; Xu Chen; Muhammad Zahoor Khan; Jianxin Xiao; Zhijun Cao
• Keywords: Rumen; Ruminant; Nursing; FOS: Health sciences; Crop; Microbiology; Agricultural and Biological Sciences; Food science; Nutritional Strategies for Ruminant Health and Production; 03 medical and health sciences; molasses; Dietary Fiber and Human Health; Health Sciences; in vitro degradability; Biology; Rumen Fermentation; 2. Zero hunger; Perception and Factors of Rabbit Meat Quality; 0303 health sciences; Nutrition and Dietetics; Life Sciences; Straw; Rice straw; rumen microbial colonization; QR1-502; Agronomy; Chemistry; microecological agents; Fermentation; rice straw; Animal Science and Zoology; Agronomy and Crop Science; Animal science; Biotechnology

In this study, we evaluated the effect of microecological agents (MA) combined with molasses (M) on the biodegradation of rice straw in the rumen. Rice straw was pretreated in laboratory polyethylene 25 × 35 cm sterile bags with no additive control (Con), MA, and MA + M for 7, 15, 30, and 45 days, and then the efficacy of MA + M pretreatment was evaluated both in vitro and in vivo. The scanning electron microscopy, X-ray diffraction analysis, and Fourier-transform infrared spectroscopy results showed that the MA or MA + M pretreatment altered the physical and chemical structure of rice straw. Meanwhile, the ruminal microbial attachment on the surface of rice straw was significantly increased after MA+M pretreatment. Furthermore, MA + M not only promoted rice straw fermentation in vitro but also improved digestibility by specifically inducing rumen colonization of Prevotellaceae_UCG-001, Butyrivibrio, and Succinimonas. Altogether, we concluded that microecological agents and molasses could be the best choices as a biological pretreatment for rice straw to enhance its nutritive value as a ruminant's feed.