1. Effect of increasing doses of chitosan to grazing beef steers on the relative population and transcript abundance of Archaea and cellulolytic and amylolytic bacterias.
- Author
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Santos, Mariana Viegas dos, Goes, Rafael Henriqe Tonissi Buschinelli, Takiya, Caio Seiti, Cabral, Luciano da Silva, Mombach, Mircéia Angele, Oliveira, Raquel Tenório, Silva, Nayara Garcia da, Anschau, Douglas Gabriel, Freitas Júnior, Jose Esler de, de Araújo, Maria Leonor Garcia Melo Lopes, and Gandra, Jefferson Rodrigues
- Subjects
CHITOSAN ,ARCHAEBACTERIA ,GRAZING ,MAGIC squares ,BEEF ,STANDARD deviations ,ANIMAL herds - Abstract
This paper aims to investigate the influence of increasing chitosan doses on the relative proportion and abundance of cellulotytic, amylolytic bacteria, and Archaea transcripts for grazing cattle. Five rumen cannulated crossbread steers [3.6 months and 300 ± 25 kg body LW (live weight), mean ± standard deviation] were used in a 5 × 5 latin square design, randomly assigned to treatment sequence containing chitosan added to 0, 400, 800, 1200, or 1600 mg/kg concentrate. There was the effect of chitosan on the population of Fibrobacter succinogenes, Ruminococcus albus, and Archaea. The lowest population of these bacteria of 576.60 mg/kg DM (dry matter), 1010.40 mg/kg DM, and 634.80 mg/kg DM were noted when chitosan was added at levels of 3.87, 4.16, and 3.52. Except for Ruminococcus albus, which was not affected by increasing chitosan doses, supplementation of this additive in the concentrate quadratically increased the relative abundance of Fibrobacter succinogenes and Archaea Supplemental 740 mg CHI/kg concentrate for grazing steers receiving concentrate at 150 grams/100 kg LW is recommended to promote minimal effect on the relative population and abundance of cellulolytics and amylomatics and to restrict Archaea growth. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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