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Anim Biosci > Volume 34(4); 2021 > Article
Ruminant Nutrition and Forage Utilization
Animal Bioscience 2021;34(4): 594-602.
DOI: https://doi.org/10.5713/ajas.20.0151    Published online August 21, 2020.
Dragon fruit (Hylocereus undatus) peel pellet as a rumen enhancer in Holstein crossbred bulls
Maharach Matra1  , Pajaree Totakul1  , Bounnaxay Viennasay1  , Burarat Phesatcha2  , Metha Wanapat1,* 
1Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand
2Department of Agricultural Technology and Environment, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand
Correspondence:  Metha Wanapat, Tel: +66-81-932-4180, Fax: +66-43-202-362, Email: metha@kku.ac.th
Received: 9 March 2020   • Revised: 18 June 2020   • Accepted: 19 July 2020
Abstract
Objective
An experiment was conducted to assess the effect of dragon fruit peel pellet (DFPP) as a rumen enhancer of dry matter consumption, nutrient digestibilities, ruminal ecology, microbial protein synthesis and rumimal methane production in Holstein crossbred bulls.
Methods
Four animals, with an average live-weight of 200±20 kg were randomly assigned in a 4×4 Latin square design to investigate the influence of DFPP supplementation. There were four different dietary treatments: without DFPP, and with 200, 300, and 400 g/h/d, respectively.
Results
Results revealed that dry matter consumption of total intake, rice straw and concentrate were not significantly different among treatments (p>0.05). It was also found that ruminal pH was not different among treatments (p>0.05), whilst protozoal group was reduced when DFPP increased (p<0.01). Blood urea nitrogen and NH3-N concentrations were increased at 400 g of DFPP supplementation (p<0.01). Additionally, volatile fatty acid production of propionate was significantly enhanced by the DFPP supplementation (p<0.05), while production of methane was consequently decreased (p<0.05). Furthermore, microbial protein synthesis and urinary purine derivatives were remarkably increased especially at 400 g of DFPP supplementation (p<0.05).
Conclusion
Plant secondary compounds or phytonutrients (PTN) containing saponins (SP) and condensed tannins (CT) have been reported to influence rumen fermentation. DFPP contains both CT and SP as a PTN. The addition of 400 g of DFPP resulted in improved rumen fermentation end-products especially propionate (C3) and microbial protein synthesis. Therefore, DFPP is a promising rumen enhancer and indicated a significant potential of DFPP as feedstuff for ruminant feed to mitigate rumen methane production.
Keywords: Dragon Fruit Peel; Rumen Fermentation; Rumen Enhancer; Methane
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