Chen Xu, Ma Yulin, Khan Muhammad Zahoor, Xiao Jianxin, Alugongo Gibson Maswayi, Li Shengli, Wang Yajing, Cao Zhijun
State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, China.
Department of Animal Sciences, Faculty of Veterinary and Animal Sciences, University of Agriculture, Dera Ismail Khan, Pakistan.
Front Vet Sci. 2022 Jun 8;9:900764. doi: 10.3389/fvets.2022.900764. eCollection 2022.
This study aims to evaluate the effect of lactic acid bacteria (LAB) and LAB-molasses (LAB + M) combination on the fermentation quality, chemical composition, physicochemical properties, degradability of rice straw and the characteristics of rumen microbial colonization on rice straw surface.
There were three pretreatments, including control (not treated, Con), treated with LAB, or LAB + M. The results showed that both LAB and LAB + M treatments altered the physical and chemical structures of rice straw and were revealed by scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD) spectroscopy, respectively. Moreover, both LAB and LAB + M pretreated rice straw increased the crude protein (CP) content, dry matter (DM) recovery, and digestibility and decreased the pH value, neutral detergent fiber (NDF), and acid detergent fiber (ADF) contents. The LAB + M pretreated rice straw increased the gas production (GP72) and rumen microbial colonization on the rice straw surface.
It is observed that LAB + M treatment could increase digestibility and the rumen microbial colonization on the rice straw surface. Therefore, LAB + M treatment can provide an alternative strategy to improve the quality of rice straw. Significance and impact of the study: This study provides an optimal pretreatment to improve the rice straw digestibility and rumen microbial colonization.
本研究旨在评估乳酸菌（LAB）以及乳酸菌与糖蜜组合（LAB + M）对稻草发酵品质、化学成分、理化性质、稻草降解性以及稻草表面瘤胃微生物定植特性的影响。
设置三种预处理方式，包括对照组（未处理，Con）、LAB处理组以及LAB + M处理组。结果表明，LAB处理组和LAB + M处理组均改变了稻草的物理和化学结构，分别通过扫描电子显微镜（SEM）和X射线衍射分析（XRD）光谱得以揭示。此外，LAB预处理组和LAB + M预处理组的稻草均提高了粗蛋白（CP）含量、干物质（DM）回收率以及消化率，并降低了pH值、中性洗涤纤维（NDF）和酸性洗涤纤维（ADF）含量。LAB + M预处理组的稻草提高了产气量（GP72）以及稻草表面的瘤胃微生物定植。
观察到LAB + M处理可提高稻草的消化率以及稻草表面的瘤胃微生物定植。因此，LAB + M处理可为提高稻草品质提供一种替代策略。研究的意义与影响：本研究提供了一种优化的预处理方法，以提高稻草消化率和瘤胃微生物定植。
