Title:	Growth and bromatological characteristics of Brachiaria decumbens and Brachiaria ruziziensis under shading and nitrogen.
Authors:	FARIA, B. M. MORENZ, M. J. F. PACIULLO, D. S. C. LOPES, F. C. F. GOMIDE, C. A. de M.
Affiliation:	BRUNA MOSCAT FARIA, UFRRJ; MIRTON JOSE FROTA MORENZ, CNPGL; DOMINGOS SAVIO CAMPOS PACIULLO, CNPGL; FERNANDO CESAR FERRAZ LOPES, CNPGL; CARLOS AUGUSTO DE MIRANDA GOMIDE, CNPGL.
Date Issued:	2018
Citation:	Revista Ciência Agronômica, v. 49, n. 3, p. 529-536, 2018.
Description:	ABSTRACT This study aimed to evaluate the productive and qualitative characteristics of Brachiaria decumbens and Brachiaria ruziziensis subjected to three levels of artificial shading (0, 36 and 54%) and four nitrogen (N) doses (0; 50; 100 and 150 mg dm-3 soil), using completely randomized design with a factorial scheme 2 x 3 x 4, with three replications. The dry matter production (DMP), the number of tillers per pot, root weight and crude protein (CP) and neutral detergent fiber (NDF) contents were evaluated. Both grasses responded quadractly to N, but B. ruziziensis presented greater production under the two highest N doses. The tillers density increased with N dose and was reduced under shading. The root weight increased with N dose, linearly in the full sun and quadractly in the shade. The shading and N showed a positive influence on CP contents. For NDF content, was observed reduction with increase of N dose. The NDF content of B. decumbens increased with shading levels; for B. ruziziensis, the greatest value was observed under intermediate shading level. The N fertilization is an important strategy to improve DMP, tillers density and CP content, for both grasses. However, intense shading should be avoided, as it reduces tillering and root weight, which may threat pasture persistence.
NAL Thesaurus:	Crude protein Silvopastoral systems Tillering Urochloa
Keywords:	Fibrous fraction Tropical grasses
DOI:	10.5935/1806-6690.20180060
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGL)