Data/hora: 05/06/2024 07:57:55

Provedor de dados: | 96
País: | Brazil
Título: | The growth dynamics in Brachiaria species according to nitrogen dose and shade
Autores: | Paciullo,Domingos Sávio Campos; Fernandes,Priscila Beligoli; Gomide,Carlos Augusto de Miranda; Castro,Carlos Renato Tavares de; Sobrinho,Fausto de Souza; Carvalho,Carlos Augusto Brandão de.
Data: | 2011-02-01
Ano: | 2011
Palavras-chave: | Brachiaria brizantha; Brachiaria decumbens; Brachiaria ruziziensis; Morphogenesis; Silvopastoral system; Tillering.
Resumo: | It was studied the effects of shading (0, 36 and 54%) and of four nitrogen doses (0, 50, 100 and 150 mg N/dm³ of soil) on the morphogenetic traits and on the tillering of grasses of Brachiaria genus (B. decumbens, B. ruziziensis and B. brizantha cv. Marandu and cv. Xaraes), cultivated in pots with 5 kg substrate. It was used a complete random design, in a 3 × 4 × 4 factorial scheme with three replications. Nitrogen promoted increase in leaf appearance rate and in average leaf blade length, whereas shading increased stem elongation rate. Leaf elongation rate and tillering varied with the interaction among shading percentages and nitrogen doses. Shading increased response efficiency of leaf elongation rate to nitrogen doses, but reduced for tillering, evidencing priority existing tillering growth in detriment to appearance of new tillers when there is light restriction for the plants. Phenotypic adjustments, in response to light reduction, indicate that the studied grasses present tolerance to moderate shading.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000200006
Editor: | Sociedade Brasileira de Zootecnia
Relação: | 10.1590/S1516-35982011000200006
Formato: | text/html
Fonte: | Revista Brasileira de Zootecnia  v.40 n.2 2011
Fonte: | info:eu-repo/semantics/openAccess