Respostas do híbrido de sorgo-sudão às adubações nitrogenada e potássica: características estruturais e produtivas

• Autor(a) principal: Simili, Flávia Fernanda
• Data de Publicação: 2010
• Outros Autores: Gomide, Carlos Augusto de Miranda, Moreira, Andréia Luciane, Reis, Ricardo Andrade, Lima, Maria Lúcia Pereira, Paz, Claudia Cristina Paro de
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UFLA
• Texto Completo: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542010000100011; http://repositorio.ufla.br/jspui/handle/1/7149
• topic: Sorgo – Manejo; Sorgo – Absorção da luz; Sorghum – Management; Sorghum – Absorption of light; Sorghum bicolor; Sorghum sudanense

This research was carried out in the Forage Section of FCAV/UNESP-Jaboticabal, to evaluate hybrid sorghum AG 2501C (Sorghum bicolor x Sorghum sudanense) during autumn/winter. Pasture management was accomplished by a simulation of intermittent stocking. The experiment was developed from March to September of 2002. The forage was submitted to nine treatments: three doses of N (100, 200, and 300 kg/ha) and three doses of K (0, 80, and 160 kg/ha of K2O) in a randomized block design with three replications in a split plot scheme. Characteristics including forage mass before grazing (FMBG), after grazing (residual), leaf and stem, leaf/stem ratio, leaf area index (LAI), interception of light, and light extinction coefficient (LEC) were evaluated. No differences for FMBG, residual, leaf, and stem were found. The averages were 2801.2, 964.7, 1462.8, and 1085.2 kg/ha of DM, per grazing cycle for FMBG, residual, leaf, and stem. There was significant interaction (p<0,01) between N and K for LAI, interception of light, and LEC.