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Environ Sci Pollut Res Int

Title:		In vitro screening of plants from the Brazilian Caatinga biome for methanogenic potential in ruminant nutrition
Author(s):		Oliveira BS; Pereira LGR; Azevedo JAG; Rodrigues JPP; de Araujo GGL; Mauricio RM; Machado FS; Campos MM; Martins TLT; Tomich TR;
Address:		"Department of Agrarian and Environmental Sciences, Universidade Estadual de Santa Cruz, Ilheus, BA, 45662-900, Brazil. Embrapa Gado de Leite, Juiz de Fora, MG, 36038-330, Brazil. luiz.gustavo@embrapa.br. Institute of Studies of the Humid Tropic, Universidade Federal do Sul e Sudeste do Para, Xinguara, PA, 68555-250, Brazil. Embrapa Semiarido, Petrolina, PE, 56302-970, Brazil. Bioengineering Department, Universidade Federal de Sao Joao Del-Rei, Sao Joao Del-Rei, MG, 36037-352, Brazil. Embrapa Gado de Leite, Juiz de Fora, MG, 36038-330, Brazil. Department of Animal Science, Universidade Federal de Minas Gerais, Belo Horizonte, MG, 31270-901, Brazil"
Journal Title:		Environ Sci Pollut Res Int
Year:		2018
Volume:		20181022
Issue:		35
Page Number:		35538 - 35547
DOI:		10.1007/s11356-018-3446-4
ISSN/ISBN:		1614-7499 (Electronic) 0944-1344 (Linking)
Abstract:		"Thirty-nine plants naturally found in Brazilian Caatinga semiarid biome were screened using an in vitro fermentability testing focused in apparent organic matter digestibility (aOMD), gas, methane (CH(4)), and short-chain fatty acid (SCFA) production. Three independent in vitro runs were carried out and plants were classified by CH(4) concentration as proportion of gas and per unit of apparent digested organic matter (aDOM). According to its CH(4) concentration on produced gas (mL/L), the plants were classified as low (> 110), medium (from 60 to 110), and high (< 60) anti-methanogenic potential. From evaluated plants, 3, 24, and 12 were classified as high, medium, and low anti-methanogenic potential. High anti-methanogenic potential plants Cnidoscolus phillacanthus (CnPh), Chloroleucon foliolosum (ChFo), and Anadenanthera macrocarpa (AnMa) produced 21.3, 34.3, and 35.9 mL CH(4)/L of gas. Methane concentration for Myracrodruon urundeuva (MyUr) was 61.1 mL/L and classified as medium potential. However, CH(4) production per unit of aDOM was similar between MyUr and AnMa (3.35 and 2.68 mL/g, respectively). Molar proportions of acetate and propionate in SCFA produced by ChFo fermentation were 0.02 and 0.78 mmol/mol. Acetate to propionate ratios were 0.79, 0.03, 1.39, and 1.36 for CnPh, ChFo, AnMa, and MyUr, respectively. Greater aOMD were observed for Opuntia sp. and Calotropis procera (632 and 601 g/kg, respectively), which were classified as medium mitigating potential plants. AnMa, ChFo, CnPh, and MyUr are promising anti-methanogenic plants for ruminants. Selecting forages to feed ruminants in Caatinga is a potential strategy for enteric CH(4) emission reduction, and our in vitro results can support future research by indicating species to be evaluated in in vivo studies integrating mixed diets with performance, digestibility, and CH(4) production, yield, and intensity. Graphical abstract »aΓ"
Keywords:		"Animal Feed/*analysis Animals Brazil Digestion Ecosystem Fatty Acids, Volatile/*analysis/metabolism Fermentation Methane/*analysis/metabolism Nutritional Status Plants/*classification/metabolism Rumen/metabolism Ruminants/*metabolism Acetate Digestibility;"
Notes:		"MedlineOliveira, Brena Santos Pereira, Luiz Gustavo Ribeiro Azevedo, Jose Augusto Gomes Rodrigues, Joao Paulo Pacheco de Araujo, Gherman Garcia Leal Mauricio, Rogerio Martins Machado, Fernanda Samarini Campos, Mariana Magalhaes Martins, Tassia Ludmila Teles Tomich, Thierry Ribeiro eng Germany 2018/10/24 Environ Sci Pollut Res Int. 2018 Dec; 25(35):35538-35547. doi: 10.1007/s11356-018-3446-4. Epub 2018 Oct 22"