Comportamento Per se de híbridos de capim-elefante para fins energéticos

Abstract

The aim of this study was to evaluate the Per se performance of elephant grass hybrids obtained by partial diallel crossing and also their parents for energy purposes through agronomic traits during rainy and dry seasons. The experiment was conducted at Pesagro experimental station, Campos dos Goytacazes, RJ, Brazil, in randomized blocks, with three repetitions. The crosses were made between contrasting parents in a partial diallel scheme with 5 female parents x 5 male parents. The treatments consisted of ten parents, twenty-five hybrid combinations and the control. Three cuts were realized for evaluations (April and October 2013 and April 2014). The characteristics evaluated were: plant height (ALT), in m; stem diameter (SD), in cm; leaf blade width (LB), in cm; number of tillers per linear meter (NP); dry matter percentage (%DM) and dry matter production (DMP), in t.ha-1. Variance analysis were performed and the means were grouped according to Scott-Knott test (P <0.05). It was oberved that the hybrid H4 (Cuban Pinda x Taiwan A-144), H7 (Cameroon - Piracicaba x Três Rios), H8 (Cameroon - Piracicaba x Mercker 86-Mexico), H10 (Cameroon - Piracicaba x Roxo), H13 (P241-86-Piracicaba x Mercker 86-Mexico), H17 (IAC Campinas x Três Rios) and H18 (IAC-86-Campinas x Mercker 86-Mexico) presented high biomass production.

Biomass Energy Production in Elephant-Grass Hybrids

“…Andreoli (2008), however, stated that with little use of inputs and investments, the dry matter yield generated by the elephant-grass biomass might reach around 20 to 25 t ha -1 . According to Menezes et al (2016), evaluating ten genotypes of elephantgrass in partial diallel, the Mercker and Taiwan A-144 genotypes were among those with the highest yields of 19.76 and 18.57 t ha -1 , respectively.…”

Selecting elephant grass families and progenies to produce bioenergy through mixed models (REML/BLUP)

“…Some plants have shown potential to be used as sources of bioenergy, namely: elephant grass (Daher et al, 2014;Rocha et al, 2015;Salazar-Zeledón et al, 2015;Ghosh, 2016;Menezes et al, 2016), sugarcane (Szczerbowski et al, 2014;Bordonal et al, 2015), sorghum (Silva et al, 2016), and eucalyptus (Eufrade Junior et al, 2016). However, in contrast to elephant grass, which shows high photosynthetic efficiency with high biomass productivity potential, some of these cultures show low dry biomass production.…”

Repeatability and minimum number of evaluations for morpho-agronomic characters of elephant-grass for energy purposes

“…For all those reasons, the elephant-grass breeding program of the Northern Fluminense State University Darcy Ribeiro -UENF develops researches with the purpose of evaluating the viability of the use of elephant-grass biomass and to identify genotypes with high productive potential and quality of biomass suitable for use as a source of energy Menezes et al, 2016;Sousa et al, 2016).…”