Journal of Integrative Agriculture ›› 2021, Vol. 20 ›› Issue (8): 2214-2226.DOI: 10.1016/S2095-3119(20)63470-0

所属专题： 动物营养合辑Animal Nutrition

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  • 收稿日期:2020-03-18 出版日期:2021-08-01 发布日期:2021-07-20

Effects of formic acid and corn flour supplementation of banana pseudostem silages on nutritional quality of silages, growth, digestion, rumen fermentation and cellulolytic bacterial community of Nubian black goats

Zhang Hao1, 2, Cheng Xuan1, 2, Mabrouk ELSABAGH3, 4, Lin Bo5, Wang Hong-rong1, 2 
  

  1. 1 Laboratory of Metabolic Manipulation of Herbivorous Animal Nutrition, College of Animal Science and Technology, Yangzhou University, Yangzhou 225009, P.R.China
    2 Joint International Research Laboratory of Agriculture and Agri-Product Safety, Ministry of Education/Yangzhou University, Yangzhou 225009, P.R.China
    3 Department of Animal Production and Technologies, Faculty of Agricultural Sciences and Technologies, Ni?de Ömer Halisdemir University, Ni?de 51240, Turkey
    4 Department of Nutrition and Clinical Nutrition, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt
    5 College of Animal Science, Guangxi University, Nanning 530004, P.R.China
  • Received:2020-03-18 Online:2021-08-01 Published:2021-07-20
  • Contact: Correspondence WANG Hong-rong, E-mail: hrwang@yzu.edu.cn
  • About author:Zhang Hao, E-mail: zhanghao_850220@126.com;
  • Supported by:
    This research was supported by the China Special Fund for Agro-scientific Research in the Public Interest (Investigation on strategies of fattening and high-quality meat productive techniques for herbivores based on resources of unconventional roughage in Southern China) (201303144), the Top Talents Award Plan of Yangzhou University, China (2016, 2020), the Cyanine Project of Yangzhou University (2020), the Technology Specialty Fund for Cooperation between Jilin Province and the Chinese Academy of Sciences, 2016SYHZ0022), the National Key Research and Development Program of China (2016YFD0700201), the National Natural Science Foundation of China (31902180), and the Natural Science Foundation of Jiangsu Province Research Project, China (BK20170488). 

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摘要：

本研究旨在探讨香蕉假茎青贮饲料中添加甲酸和玉米粉对青贮营养价值和努比亚黑山羊生长性能、营养消化、瘤胃发酵及纤维素降解菌的影响。香蕉假茎青贮饲料分为四组：常规不添加任何添加剂(CON)，添加0.6%甲酸组(F)、添加10%玉米粉组(C)，同时添加0.6%甲酸和10%玉米粉组 (F+C)。四种全混合日粮分别包含以上40%含量的青贮饲料，粗精比为50:50 (干物质基础)。选取阉割的努比亚黑山羊48只(4月龄；体重22.64±1.82 kg) 采取完全随机设计，分为四组，每组12只羊。分别饲喂四种含有不同香蕉假茎青贮饲料的全混合日粮，正式饲养周期为40天。试验采用2 (甲酸添加量：0和0.6%)×2 (玉米粉添加量：0和10%)双因素方差分析。试验结果如下，与CON组相比，添加甲酸显著提高了平均日增重、乳酸、丙酸、丁酸和水溶性碳水化合物浓度 (P<0.05)，显著降低了饲料转化率、pH值、乙酸/丙酸和丁酸浓度 (P<0.05)。与CON组相比，添加玉米粉显著提高了粗蛋白、中性洗涤纤维和非纤维性碳水化合物的表观消化率 (P<0.05)，显著增加了瘤胃中产琥珀酸丝状杆菌，白色瘤胃球菌和溶纤维丁酸弧菌的含量 (P< 0.05)。除非纤维性碳水化合物表观消化率外，其他指标均无F×C相互作用 (P> 0.05)。结果表明，在香蕉假茎青贮饲料中添加0.6%甲酸和10%玉米粉，可改善香蕉假茎青贮饲料的营养品质，也可通过提高营养成分的表观消化率，调节瘤胃发酵指标和细菌数量，进而提高努比亚黑山羊的生长性能。


Abstract:

The objective of this study was to evaluate the effects of adding formic acid and corn flour supplementation to banana pseudostem silages on the nutritional quality of these silages, growth, digestion, rumen fermentation and cellulolytic bacterial community of Nubian black goats fed these silages.  Banana pseudostem silage was prepared either conventionally without any additives (CON) or mixed with 0.6% formic acid (F), 10% corn flour (C), or both (F+C).  Four experimental diets containing 40% of the corresponding silages were designed with roughage to concentrate ratio of 50:50 (dry matter (DM) basis).  A total of 48 Nubian black castrated goats (body weight (BW), (22.64±1.82) kg; 4-mon-old) were randomized into one of the four treatment groups with 12 replicates of one castrated goat per replicate for each treatment in a completely randomized design.  Each group was fed on one of the four experimental diets for 40 days.  A factorial arrangement of treatments of 2 (formic acid levels: 0 and 0.6%)×2 (corn flour: 0 and 10%) was adopted.  Formic acid supplementation increased (P<0.05) average daily gain, as well as lactic acid, propionate and butyric acid and water-soluble carbohydrate concentrations, but decreased (P<0.05) the feed conversion rate, pH value, acetate/propionate ratio, and butyric acid concentration relative to the CON group.  Corn flour supplementation increased (P<0.05) the apparent digestibility of crude protein, neutral detergent fiber, and non-fibrous carbohydrate and Fibrobacter succinogenes, Ruminococcus albus, and Butyrivibrio fibrisolvens populations, but decreased (P<0.05) the Ruminococcus flavefaciens population relative to the CON group.  There were no F×C treatment interactions (P>0.05) for any of the other indices except for the apparent digestibility of non-fibrous carbohydrate (NFC) (P<0.05).  The results demonstrated that adding 0.6% formic acid and 10% corn flour supplementation to banana pseudostem silages improved the nutritional quality of these silages and enhanced the growth performance of Nubian black castrated goats by improving apparent nutrient digestibility, and regulating ruminal fermentation and bacteria populations.

Key words: banana pseudostem ,  silage ,  goat ,  nutrient digestion ,  rumen fermentation ,  ruminal cellulolytic bacteria