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Potential of Recycling Cauliflower and Romanesco Wastes in Ruminant Feeding: In Vitro Studies

AuthorsEvan, Trinidad de; Vintimilla, Andrea; Molina Alcaide, E.; Ranilla, María José ; Carro Travieso, Mª Dolores
In vitro rumen fermentation
In vitro intestinal digestibility
Issue Date2020
PublisherMultidisciplinary Digital Publishing Institute
CitationAnimals 10(8): 1247 (2020)
AbstractThe nutritive values for ruminants of cauliflower (CAU) and Romanesco (ROM) wastes (leaves, stems and sprouts) were assessed by analyzing their chemical composition, in vitro ruminal fermentation, and in vitro intestinal digestibility. In addition, the in vitro ruminal fermentation of diets containing increasing amounts of CAU was studied. The dry matter (DM) content of leaves, stems and sprouts of both vegetables was lower than 10%, but they contained high crude protein (CP; 19.9 to 33.0%) and sugar (16.3 to 28.7%) levels, and low neutral detergent fiber (21.6 to 32.3%). Stems and sprouts were more rapidly and extensively fermented in the rumen than leaves, but there were only minor differences the fermentation profiles of both vegetables. The estimated metabolizable energy content ranged from 9.3 (leaves) to 10.8 (sprouts) MJ/kg DM. The CP rumen degradability (12-h in situ incubations) was greater than 80.0% for all fractions, and the in vitro intestinal digestibility of CP ranged from 85.7 to 93.2%. The inclusion of up to 24% of dried CAU in the concentrate of a mixed diet (40:60 alfalfa hay:concentrate) increased the in vitro rumen fermentation of the CAU diet, but did not affect methane (CH4) production, indicating the lack of antimethanogenic compounds in CAU.
Description© 2020 by the authors.
Publisher version (URL)https://doi.org/10.3390/ani10081247
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