Data/hora: 12/06/2024 15:19:51

Provedor de dados: | 65
País: | Brazil
Título: | Relationship between the morphogenesis of Italian ryegrass cv. 'BRS Ponteio' with forage and seed production
Autores: | Cunha,Ricardo Pereira da; Pedroso,Carlos Eduardo da Silva; Mittelmann,Andréa; Oliveira,Roberto Caetano de; Bohn,Alberto; Silva,Jéssica Dias Gomes da; Maia,Manoel de Souza.
Data: | 2016-01-01
Ano: | 2016
Palavras-chave: | Lolium multiflorum Lam.; Defoliation frequency; Leaf expansion rate; Leaf senescence rate; Phenotypic.
Resumo: | This study aims to verify, accurate and precisely, the responses of Italian ryegrass 'BRS Ponteio' cultivar to different frequencies of defoliation for forage production and especially for seed production. For this purpose, a randomized block design experiment with four replications was conducted. Four frequencies of defoliation were applied (zero, one, two, and three) based on the thermal sum, evaluating the rate of leaf appearance (LAR), phyllochron (P), leaf expansion rate (LER), leaf senescence rate (LSR), stems expansion rate (SER), tillering rate (TR), leaf life span (LL), forage production, proportion of leaf blades, stems plus sheaths, senescent material, and inflorescences, as well as seed production. Second defoliation noticeably altered the morphogenic plant responses, reduced expansion rates and leaf appearance, increased rates of tillering and stems expansion. This phenotypic maintained a high seed production and provided a harvest of forage mass 100% higher than the collected mass in the first cutting. Third defoliation led to an increase of 100% of the harvested forage mass; however, it caused drastic and negative changes in the morphogenic characteristics and seed yielding.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000100053
Editor: | Universidade Federal de Santa Maria
Relação: | 10.1590/0103-8478cr20150296
Formato: | text/html
Fonte: | Ciência Rural  v.46 n.1 2016
Fonte: | info:eu-repo/semantics/openAccess