Resumen de Lignocellulosic biomass production in six cultivars of Cenchrus purpureus (Schumach.) Morrone in the tropics.
Maribel Montero Lagunes, Julio Cesar Vinay-Vadillo, Javier Francisco Enríquez Quiroz, Arely Jiménez Montero, Francisco Indalecio Juárez Lagunes, Eduardo Daniel Bolaños Aguilar
Objective: To determine the cellulose, hemicellulose, and lignin production in six Cenchrus purpureus cultivars, with and without fertilization, harvested every 21 days during 168 days.
Design/methodology/approach: The evaluated cultivars were CT-115, elephant grass, king grass, Maralfalfa, Roxo, and Taiwan, with and without fertilization. The experimental design was a randomized complete block with a split-plot arrangement and four replications. The fertilization dose was 141-43-20 of NPK. Forage was harvested every 21 days during six months in the rainy season. We tested the samples for dry matter (DM), ash, NDF, ADF, hemicellulose, cellulose, and lignin. We performed a nonlinear regression analysis. We determined biomass production with the estimated values and the percentage of each component. The goodness-of-fit indicators were: R2, the coefficient of determination (R), and the model selection criterion (MSC). The parameters and goodness-of-fit coefficients were analyzed in ANOVA with the SAS software using the GLM procedure. Means were compared with Tukey’s test.
Results: The Maralfalfa cultivar presented a higher cellulose production (3,786 kg ha1), similar (p0.05) to the elephant grass and Taiwan cultivars, which presented values of 3,451 kg ha1 and 3,329 kg ha1, respectively, and different (p0.05) from CT-115 and king grass, which produced more than 1 t ha1 of cellulose.
Limitations/implications: Cellulose production increased by the effect of fertilization.
Findings/conclusions: The fertilized Maralfalfa, elephant grass, and Taiwan cultivars produced more than 4,000 kg ha1 of cellulose, 3,000 kg ha1 of hemicellulose, and 1,000 kg ha1 of lignin.
