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Effect of different genotypes of Tithonia diversifolia on fermentation of feed mixtures with Urochloa brizantha cv. Marandú

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Title Effect of different genotypes of Tithonia diversifolia on fermentation of feed mixtures with Urochloa brizantha cv. Marandú
 
Creator Arango, Jacobo
Rivera, Julian
Chará, Julián
Barahona Rosales, Rolando
 
Subject chemical composition
methane emission
rumen digestion
volatile fatty acids
composición quimica
emisiones de metano
digestión ruminal
ácido graso volátil
tithonia diversifolia
 
Description Tithonia diversifolia (Mexican sunflower) is a shrub used for animal feed that has outstanding agronomic and chemical characteristics. Its potential to modify the dynamics of fermentation and improve the supply of nutrients to ruminants has received considerable attention. This study was designed to determine the effect of different genotypes of T. diversifolia on ruminal fermentation and degradation of dry matter (DM), concentration of volatile fatty acids, and production of methane (CH4) when mixed with a low-quality tropical grass, Urochloa brizantha (palisade grass). In a randomised complete block design, mixtures of seven genotypes of T. diversifolia with U. brizantha cv. Marandú were evaluated by using the in vitro gas production technique. The effect of fertilisation was also evaluated for each genotype. Inclusion of T. diversifolia significantly (P < 0.05) increased the supply of nutrients and modified fermentation parameters. DM degradation of biomass after 72 h was greater in the presence of T. diversifolia than for feeds based only on U. brizantha (68.0% vs 63.4%; P < 0.01). CH4 production was lower (P < 0.05) during fermentation with some T. diversifolia genotypes (25.3 vs 27.7 mg CH4 g–1 incubated DM), and the acetic:propionic acid ratio was also lower. Fertilisation of T. diversifolia genotypes increased DM degradation, increased the content of certain nutrients (e.g. crude protein) and modified CH4 production. Therefore, inclusion of T. diversifolia in mixtures based on low-quality tropical grasses such as U. brizantha increases the supply of nutrients (crude protein, minerals, energy) and can modify the products of enteric fermentation, with some genotypes decreasing enteric CH4 emissions.
 
Date 2021
2021-11-15T09:05:29Z
2021-11-15T09:05:29Z
 
Type Journal Article
 
Identifier Rivera, J.; Chará, J.; Arango, J.; Barahona, R. (2021) Effect of different genotypes of Tithonia diversifolia on fermentation of feed mixtures with Urochloa brizantha cv. Marandú. Crop and Pasture Science 72 p. 850-859. ISSN: 1836-0947
1836-0947
https://hdl.handle.net/10568/116071
https://doi.org/10.1071/CP21102
PII-LAM_LivestockPlus
 
Language en
 
Rights CC-BY-NC-4.0
Open Access
 
Format 850-859
application/pdf
 
Publisher CSIRO Publishing
 
Source Crop and Pasture Science