Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/48337
Title: Seasonal herbage accumulation and canopy characteristics of novel and standard brachiariagrasses under N fertilization and irrigation in southeastern Brazil
Keywords: Tropical grasses - Quality
Forage–livestock systems - Management
Leaf area index (LAI)
Seasonal changes
Mechanical harvesting
Acúmulo de forragem
Gramíneas tropicais - Qualidade
Fertilizantes nitrogenados
Manejo de pastagem
Índice de área foliar (LAI)
Sazonalidade
Colheita mecanizada
Issue Date: Sep-2020
Publisher: Crop Science Society of America
Citation: LARA, M. A. S. et al. Seasonal herbage accumulation and canopy characteristics of novel and standard brachiaria grasses under N fertilization and irrigation in southeastern Brazil. Crop Science, [S. I.], v. 61, n. 2, p. 1468-1477, Mar./Apr. 2021. DOI: 10.1002/csc2.20353. .
Abstract: Understanding seasonal changes in herbage accumulation (HA) and canopy characteristics of tropical grasses aids management of forage–livestock systems and optimizes use of novel cultivars in traditional and integrated systems. The objective of this study was to describe and explain seasonal HA and canopy characteristics of three standard brachiariagrass cultivars in southeastern Brazil under conditions of N fertilization and irrigation: ‘Basilisk’ signalgrass [Brachiaria decumbens (Stapf.); syn. Urochloa decumbens (Stapf) R. D. Webster]; two commercially released palisadegrass [B. brizantha (Hochst. Ex A. Rich.) Stapf.; syn. U. brizantha (Hochst. ex A. Rich.) R. D. Webster] cultivars, Marandu and Xaraés; and unreleased selections of palisadegrass, Arapoty and Capiporã. Grass plots were mechanically harvested every 28 d during the warm season and every 42 d during the cool season to 15-cm stubble starting in September 2005 and ending in September 2008. Capiporã and Xaraés were the most productive (15.6 and 14.6 Mg dry matter [DM] ha−1, respectively) despite having greater seasonality of growth. Arapoty did not show advantages over the cultivars Basilisk and Marandu, with similar total annual HA (∼11 Mg DM ha−1). Arapoty and Basilisk forage averaged 50% more stems than the other grasses in the warm season. Leaf area index (LAI) and light interception (LI) at harvest did not vary among grasses in Year 1, with an average of 3.1 and 90.3%, respectively, and were generally greater for Marandu in Year 2. Capiporã and Xaraés are options for intensive pasture-based livestock production systems and for pasture diversification in tropical areas because of their good HA with great leaf proportion.
URI: https://doi.org/10.1002/csc2.20353
http://repositorio.ufla.br/jspui/handle/1/48337
Appears in Collections:DZO - Artigos publicados em periódicos

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