Title:	Chemical composition and energy yield of elephant-grass biomass as function of five different production ages.
Authors:	FREITAS, R. S. BARBÉ, T. da C. DAHER, R. F. VIDAL, A. K. F. STIDA, W. F. SILVA, V. B. da MENEZES, B. R. da S. PEREIRA, A. V.
Affiliation:	Rafael Souza Freitas, UENF; Tatiane da Costa Barbé, UENF; Rogério Figueiredo Daher, UENF; Ana Kesia Faria Vidal, UENF; Wanessa Francesconi Stida, UENF; Veronica Brito da Silva, UENF; Bruna Rafaela da Silva Menezes, UFRRJ; ANTONIO VANDER PEREIRA, CNPGL.
Date Issued:	2018
Citation:	Journal of Agricultural Science (Toronto), v. 10, n. 1, p. 343-353, 2018.
Description:	Abstract Elephant grass has high biomass production, with qualities suitable for conversion into bioenergy, but has long been used exclusively for animal feed and only in recent years has it become an energetic alternative. Therefore, it is necessary to select genotypes with potential for energy production. This study evaluated the effect of five harvest times (8, 12, 16, 20, and 24 weeks) on the yield and chemical composition related to biomass quality through combined polynomial regression analyses of the following elephant grass genotypes: Cubano Pinda, Mercker 86-México, Pusa Napier n°1, Mole de Volta Grande, P-241-Piracicaba, and King Grass. A completely randomized design with three replicates, in a split-plot arrangement, was adopted, including two factors (plots = genotypes, subplots = harvest times). The evaluated variables were whole-plant dry matter yield, in t ha-1 (DMY), percentage of neutral detergent fiber (%NDF), and percentage of acid detergent fiber (%ADF). The elephant-grass genotypes Cubano de Pinda, Mercker 86-México, and P-241-Piracicaba showed a linear first-degree effect as a function of the harvest intervals, indicating that they did not reach their maximum production potential. Genotypes Pusa Napier n°1, Mole de Volta Grande, and King Grass, in turn, had a linear second-degree effect. For the NDF variable, all genotypes showed a significant linear second-degree effect as a function of the harvest intervals, except P-241-Piracicaba, for which no regression was observed. For this genotype, there was a significant linear first-degree effect on the %ADF variable.
NAL Thesaurus:	Bioenergy
Keywords:	Pennisetum purpureum Schum Linear regression Biomass quality
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Artigo em periódico indexado (CNPGL)