| Registro completo |
| Provedor de dados: |
R. Bras. Zootec.
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| País: |
Brazil
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| Título: |
Canopy structure and forage nutritive value of elephantgrass subjected to different stocking rate and N fertilization in the “Mata Seca” ecoregion of Pernambuco
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| Autores: |
Dourado,Diego Loiola
Dubeux Junior,José Carlos Batista
Mello,Alexandre Carneiro Leão de
Santos,Mércia Virginia Ferreira dos
Lira,Mário de Andrade
Freitas,Erinaldo Viana de
Apolinário,Valéria Xavier de Oliveira
Santos,Erick Rodrigo da Silva
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| Data: |
2019-01-01
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| Ano: |
2019
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| Palavras-chave: |
Grazing
Livestock
Nitrogen
Pasture
Pennisetum purpureum
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| Resumo: |
ABSTRACT The objective was to evaluate the effect of three stocking rates (2, 3.9, and 5.8 animal units ha−1) and three fertilization levels (0, 150, and 300 kg N ha−1 yr−1) on herbage mass and nutritive value of elephantgrass (Pennisetum purpureum Schum.) cv. IRI-381. The experiment was conducted from May to August of 2009 and 2010 in Itambé, PE, Brazil, during the rainy season. Treatments were allocated in a split-plot arrangement in a completely randomized block design. The variables measured included leaf mass (pre- and post-grazing), botanical composition, soil cover, leaf area index, light interception, leaf angle, and concentrations of dry matter, organic matter, N, and in vitro digestible dry matter. When fertilized with 300 kg N ha−1 yr−1, leaf mass reached 18,560 kg ha−1. Leaf area index decreased with increasing stocking rate. The relationship between sward height and light interception was R2 = 0.0126. Increased stocking rate resulted in greater contribution of signalgrass [Brachiaria decumbens (Stapf.) R.D. Webster] in the botanical composition, with a contribution up to 29% in 2010. Elephantgrass nutritive value is directly affected by the fertilization levels and stocking rate, with highest nutrient concentrations observed with 2 AU ha−1 and 300 kg N ha−1 yr−1.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100400
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| Editor: |
Sociedade Brasileira de Zootecnia
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| Relação: |
10.1590/rbz4820180134
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Zootecnia v.48 2019
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| Direitos: |
info:eu-repo/semantics/openAccess
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