Relationship between Chemical Composition and In Vitro Methane Production of High Andean Grasses

The present study aims to establish the relationship between chemical composition and in vitro methane (CH4) production of high Andean grasses. For this purpose, eight species were collected in dry and rainy seasons: Alchemilla pinnata, Distichia muscoides, Carex ecuadorica, Hipochoeris taraxacoides...

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Published inAnimals (Basel) Vol. 12; no. 18; p. 2348
Main Authors Chino Velasquez, Liz Beatriz, Molina-Botero, Isabel Cristina, Moscoso Muñoz, Juan Elmer, Gómez Bravo, Carlos
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 08.09.2022
MDPI
Subjects
Carbon dioxide
Chemical composition
Digestibility
Dry season
Emissions
Fermentation
forages
Gas production
Grasses
Greenhouse gases
Humidity
Laboratories
Liquor
Methane
Microorganisms
nutritional quality
Oil and gas production
Organic matter
Proteins
Rainy season
ruminants
Seasons
United States > US
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Summary:The present study aims to establish the relationship between chemical composition and in vitro methane (CH4) production of high Andean grasses. For this purpose, eight species were collected in dry and rainy seasons: Alchemilla pinnata, Distichia muscoides, Carex ecuadorica, Hipochoeris taraxacoides, Mulhenbergia fastigiata, Mulhenbergia peruviana, Stipa brachiphylla and Stipa mucronata. They were chemically analyzed and incubated under an in vitro system. Species such as A. pinnata and H. taraxacoides were characterized by high crude protein (CP. 124 g/kg DM) and low neutral detergent fiber (NDF. 293 g/kg DM) contents in both seasons, contrary to Stipa grasses. This same pattern was obtained for H. taraxacoides, which presented the highest values of gas production, organic matter digestibility (DOM), metabolizable energy (ME) and CH4 production (241 mL/g DM, 59% DOM, 8.4 MJ ME/kg DM and 37.7 mL CH4/g DM, on average). For most species, the content of CP, acid detergent fiber (FDA) and ME was higher in the rainy season than in the dry season, which was the opposite for CH4 production (p ≥ 0.05). In general, the nutritional content that most explained the behavior of CH4 production was the NDF content (R2 = 0.69). Grasses characterized by high NDF content produced less CH4 (R = −0.85).
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ISSN:2076-2615
2076-2615
DOI:10.3390/ani12182348