Data/hora: 06/06/2024 00:58:03

Provedor de dados: | 96
País: | Brazil
Título: | Canopy structure and forage nutritive value of elephantgrass subjected to different stocking rate and N fertilization in the “Mata Seca” ecoregion of Pernambuco
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.
Data: | 2019-01-01
Ano: | 2019
Palavras-chave: | Grazing; Livestock; Nitrogen; Pasture; Pennisetum purpureum.
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.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982019000100400
Editor: | Sociedade Brasileira de Zootecnia
Relação: | 10.1590/rbz4820180134
Formato: | text/html
Fonte: | Revista Brasileira de Zootecnia  v.48 2019
Fonte: | info:eu-repo/semantics/openAccess