Morphogenesis of native grasses of Pampa Biome under nitrogen fertilization

• Published in: Revista brasileira de zootecnia Vol. 42; no. 1; pp. 22 - 29
• Main Authors: Machado, Juliana Medianeira, Rocha, Marta Gomes da, Quadros, Fernando Luiz Ferreira de, Confortin, Anna Carolina Cerato, Santos, Aline Bosak dos, Sichonany, Maria José de Oliveira, Ribeiro, Laila Arruda, Rosa, Aline Tatiane Nunes da
• Format: Journal Article
• Language: English; Portuguese
• Published: Sociedade Brasileira de Zootecnia 01.01.2013
• Subjects: AGRICULTURE, DAIRY & ANIMAL SCIENCE; leaf elongation rate; leaf lifespan; number of green leaves; phyllochron; VETERINARY SCIENCES; phyllochron; leaf lifespan; leaf elongation rate; number of green leaves
• ISSN: 1516-3598; 1806-9290; 1516-3598; 1806-9290
• DOI: 10.1590/S1516-35982013000100004

Morphogenetic and structural characteristics of the native grasses of the Pampa Biome Andropogon lateralis, Aristida laevis, Axonopus affinis, Erianthus angustifolius, Paspalum notatum, Paspalum plicatulum, Piptochaetium montevidense and Sorghastrum pellitum were evaluated as to the effect of nitrogen (N) fertilization (zero and 100 kg N/ha). The experimental design was of randomized blocks with three replicates in a 8 × 2 (native grasses × N) factorial arrangement. Accumulated thermal sums of 350 and 700 degree days determined the interval between cuts for prostrate and caespitose growth habit species, respectively. Species considered of resource conservation (A. laevis, E. angustifolius, P. plicatulum and S. pellitum) had the highest leaf elongation rate when they received N. For leaf appearance rate, phyllochron, leaf senescence rate, leaf lifespan, number of green leaves and final length of leaf blades, there was difference between the evaluated species.