Zhao-Yang Cui, Wen-Juan Li, Wei-Kang Wang, Qi-Chao Wu, Yao-Wen Jiang, Ailiyasi Aisikaer, Fan Zhang, He-Wei Chen, Hong-Jian Yang
{"title":"小麦青贮部分替代燕麦干草，在羔羊采食量较低的情况下，表现出较高的饲料效率和纤维消化能力","authors":"Zhao-Yang Cui, Wen-Juan Li, Wei-Kang Wang, Qi-Chao Wu, Yao-Wen Jiang, Ailiyasi Aisikaer, Fan Zhang, He-Wei Chen, Hong-Jian Yang","doi":"10.1016/j.aninu.2023.08.010","DOIUrl":null,"url":null,"abstract":"<div><p>This study aimed to investigate the feeding effect of wheat silage on growth performance, nutrient digestibility, rumen fermentation, and microbiota composition in feedlot lambs. Sixty-four male crossbred Chinese Han lambs (BW = 27.8 ± 0.67 kg, 3 months of age) were randomly assigned to four ration groups with wheat silage replacing 0% (WS0), 36% (WS36), 64% (WS64), and 100% (WS100) of oaten hay on forage dry matter basis. The concentrate-to-forage ratio was 80:20 and the feeding trial lasted 52 d. Increasing wheat silage inclusion linearly decreased dry matter intake by 4% to 27% (<em>P</em> < 0.01). However, increasing the wheat silage replacement of oaten hay by no more than 64% improved the feed efficiency by 14% as noted by the feed-to-gain ratio (<em>P</em> = 0.04). Apparent digestibility of organic matter (<em>P</em> < 0.01), neutral detergent fibre (<em>P</em> = 0.04) and acid detergent fibre (<em>P</em> < 0.01) quadratically increased. Ammonia nitrogen (<em>P</em> = 0.01) decreased while microbial protein production (<em>P</em> < 0.01) increased with the increase of wheat silage inclusion. Total volatile fatty acids concentration increased quadratically with the increase of wheat silage inclusion (<em>P</em> < 0.01), and the highest occurred in WS64. The molar proportion of acetate (<em>P</em> < 0.01) and acetate-to-propionate ratio (<em>P</em> = 0.04) decreased while butyrate (<em>P</em> < 0.01) and isovalerate (<em>P</em> = 0.04) increased. Increasing wheat silage inclusion increased the Firmicutes-to-Bacteroidota ratio by 226% to 357%, resulting in Firmicutes instead of Bacteroidota being the most abundant phylum. The relative abundance of cellulolytic <em>Ruminococcus</em> numerically increased but that of amylolytic <em>Prevotella</em> (<em>P</em> < 0.01) decreased as increasing wheat silage inclusion. Taken together, increasing wheat silage replacement of oaten hay by no more than 64% exhibited greater feed efficiency and fibre digestion despite low feed intake by feedlot lambs due to the change of Firmicutes-to-Bacteroidota ratio in the rumen.</p></div>","PeriodicalId":62604,"journal":{"name":"Animal Nutrition","volume":"15 ","pages":"Pages 332-340"},"PeriodicalIF":6.3000,"publicationDate":"2023-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2405654523001208/pdfft?md5=09fd279f0ea5f3812bfc669b43b5dc20&pid=1-s2.0-S2405654523001208-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Wheat silage partially replacing oaten hay exhibited greater feed efficiency and fibre digestion despite low feed intake by feedlot lambs\",\"authors\":\"Zhao-Yang Cui, Wen-Juan Li, Wei-Kang Wang, Qi-Chao Wu, Yao-Wen Jiang, Ailiyasi Aisikaer, Fan Zhang, He-Wei Chen, Hong-Jian Yang\",\"doi\":\"10.1016/j.aninu.2023.08.010\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This study aimed to investigate the feeding effect of wheat silage on growth performance, nutrient digestibility, rumen fermentation, and microbiota composition in feedlot lambs. Sixty-four male crossbred Chinese Han lambs (BW = 27.8 ± 0.67 kg, 3 months of age) were randomly assigned to four ration groups with wheat silage replacing 0% (WS0), 36% (WS36), 64% (WS64), and 100% (WS100) of oaten hay on forage dry matter basis. The concentrate-to-forage ratio was 80:20 and the feeding trial lasted 52 d. Increasing wheat silage inclusion linearly decreased dry matter intake by 4% to 27% (<em>P</em> < 0.01). However, increasing the wheat silage replacement of oaten hay by no more than 64% improved the feed efficiency by 14% as noted by the feed-to-gain ratio (<em>P</em> = 0.04). Apparent digestibility of organic matter (<em>P</em> < 0.01), neutral detergent fibre (<em>P</em> = 0.04) and acid detergent fibre (<em>P</em> < 0.01) quadratically increased. Ammonia nitrogen (<em>P</em> = 0.01) decreased while microbial protein production (<em>P</em> < 0.01) increased with the increase of wheat silage inclusion. Total volatile fatty acids concentration increased quadratically with the increase of wheat silage inclusion (<em>P</em> < 0.01), and the highest occurred in WS64. The molar proportion of acetate (<em>P</em> < 0.01) and acetate-to-propionate ratio (<em>P</em> = 0.04) decreased while butyrate (<em>P</em> < 0.01) and isovalerate (<em>P</em> = 0.04) increased. Increasing wheat silage inclusion increased the Firmicutes-to-Bacteroidota ratio by 226% to 357%, resulting in Firmicutes instead of Bacteroidota being the most abundant phylum. The relative abundance of cellulolytic <em>Ruminococcus</em> numerically increased but that of amylolytic <em>Prevotella</em> (<em>P</em> < 0.01) decreased as increasing wheat silage inclusion. Taken together, increasing wheat silage replacement of oaten hay by no more than 64% exhibited greater feed efficiency and fibre digestion despite low feed intake by feedlot lambs due to the change of Firmicutes-to-Bacteroidota ratio in the rumen.</p></div>\",\"PeriodicalId\":62604,\"journal\":{\"name\":\"Animal Nutrition\",\"volume\":\"15 \",\"pages\":\"Pages 332-340\"},\"PeriodicalIF\":6.3000,\"publicationDate\":\"2023-09-19\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2405654523001208/pdfft?md5=09fd279f0ea5f3812bfc669b43b5dc20&pid=1-s2.0-S2405654523001208-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Animal Nutrition\",\"FirstCategoryId\":\"1091\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2405654523001208\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Animal Nutrition","FirstCategoryId":"1091","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2405654523001208","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Wheat silage partially replacing oaten hay exhibited greater feed efficiency and fibre digestion despite low feed intake by feedlot lambs
This study aimed to investigate the feeding effect of wheat silage on growth performance, nutrient digestibility, rumen fermentation, and microbiota composition in feedlot lambs. Sixty-four male crossbred Chinese Han lambs (BW = 27.8 ± 0.67 kg, 3 months of age) were randomly assigned to four ration groups with wheat silage replacing 0% (WS0), 36% (WS36), 64% (WS64), and 100% (WS100) of oaten hay on forage dry matter basis. The concentrate-to-forage ratio was 80:20 and the feeding trial lasted 52 d. Increasing wheat silage inclusion linearly decreased dry matter intake by 4% to 27% (P < 0.01). However, increasing the wheat silage replacement of oaten hay by no more than 64% improved the feed efficiency by 14% as noted by the feed-to-gain ratio (P = 0.04). Apparent digestibility of organic matter (P < 0.01), neutral detergent fibre (P = 0.04) and acid detergent fibre (P < 0.01) quadratically increased. Ammonia nitrogen (P = 0.01) decreased while microbial protein production (P < 0.01) increased with the increase of wheat silage inclusion. Total volatile fatty acids concentration increased quadratically with the increase of wheat silage inclusion (P < 0.01), and the highest occurred in WS64. The molar proportion of acetate (P < 0.01) and acetate-to-propionate ratio (P = 0.04) decreased while butyrate (P < 0.01) and isovalerate (P = 0.04) increased. Increasing wheat silage inclusion increased the Firmicutes-to-Bacteroidota ratio by 226% to 357%, resulting in Firmicutes instead of Bacteroidota being the most abundant phylum. The relative abundance of cellulolytic Ruminococcus numerically increased but that of amylolytic Prevotella (P < 0.01) decreased as increasing wheat silage inclusion. Taken together, increasing wheat silage replacement of oaten hay by no more than 64% exhibited greater feed efficiency and fibre digestion despite low feed intake by feedlot lambs due to the change of Firmicutes-to-Bacteroidota ratio in the rumen.
期刊介绍：
Animal Nutrition encompasses the full gamut of animal nutritional sciences and reviews including, but not limited to, fundamental aspects of animal nutrition such as nutritional requirements, metabolic studies, body composition, energetics, immunology, neuroscience, microbiology, genetics and molecular and cell biology related to primarily to the nutrition of farm animals and aquatic species. More applied aspects of animal nutrition, such as the evaluation of novel ingredients, feed additives and feed safety will also be considered but it is expected that such studies will have a strong nutritional focus. Animal Nutrition is indexed in SCIE, PubMed Central, Scopus, DOAJ, etc.
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