Grazing Intensity Impacts on Herbage Mass, Sward Structure, Greenhouse Gas Emissions, and Animal Performance: Analysis of Brachiaria Pastureland
| Autor: | Rondineli Pavezzi Barbero, Liziane de Figueiredo Brito, Mariane Vieira Azenha, Fernando Ongaratto, Ana Cláudia Ruggieri, Jefferson Fabiano Werner Koscheck, Abmael da Silva Cardoso, Daniel Rume Casagrande, André Alves de Oliveira, Ricardo Andrade Reis |
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| Přispěvatelé: | Universidade Estadual Paulista (Unesp), Universidade Federal de Lavras (UFLA), Univ Fed Rural Rio De Janeiro, Premix, Trouw Nutr |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Canopy
biology lcsh:S 0402 animal and dairy science Forage 04 agricultural and veterinary sciences Beef cattle biology.organism_classification 040201 dairy & animal science Brachiaria lcsh:Agriculture Neutral Detergent Fiber tropical pasture Animal science beef cattle Greenhouse gas Soil water Grazing 040103 agronomy & agriculture 0401 agriculture forestry and fisheries Environmental science Agronomy and Crop Science Marandu grass continuous stocking |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP Agronomy, Vol 10, Iss 1750, p 1750 (2020) Agronomy Volume 10 Issue 11 |
| Popis: | A 7 year experiment (2008&ndash 2014) evaluated cattle grazing intensity (sward height) effects on herbage mass, forage quality, and greenhouse gas emissions in continuously stocked pastures containing the tropical &lsquo Marandu&rsquo palisade grass (Brachiaria brizantha (Hochst. ex A. Rich) Stapf cv. Marandu). The experiment consisted of three sward height treatments (15, 25, and 35 cm) and six replicates. There were four periods each year during the rearing phase. Significant effects were found for herbage mass, proportions of leaf and stem, crude protein, neutral detergent fiber, acid detergent fiber, lignin, animal performance, enteric methane (CH4), and greenhouse gas (GHG) emissions from soils. When the canopy height increased from 15 to 35 cm, the herbage mass rose from 5.23 to 9.86 kg t ha&minus 1, leaf percentage decreased, and stem percentage increased. Crude protein content averaged 14.2%, and neutral detergent fiber averaged 58%. Average daily gain averaged 0.67, 0.81, and 0.90 kg &minus 1 head&minus 1, while live weight gain ha&ndash 1 was 649, 530, and 439 kg for the 15, 25, and 35 cm treatments, respectively. The weather variables explained the GHG emissions, interannual herbage mass, and structure variations. |
| Databáze: | OpenAIRE |
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