Abstract

SANCHEZ, Tania; PEDRAZA, R; MAYES, B  and  0SKORV, B. Determination of hydrocarbonated compounds in the cell wall from P. maximum and L. leucocephala under silvopastoral system conditions. Pastos y Forrajes [online]. 2009, vol.32, n.3, pp.1-1. ISSN 0864-0394.

With the objective of determining the concentration of n-alkanes and long-chain alcohols in the cell wall of Panicum maximum cv. Likoni and Leucaena leucocephala cv. Cunningham, a study was conducted in an association of improved grasses and leucaena ten years after being established, which occupies an area of 1,6 ha. Such species were selected for being the most representative ones in the floristic composition. The samples were collected from January to December, 2005 and were dried. The concentration of odd-chain n-alkanes was 167,97 and 222,96 mg/kg DM and 134,11 and 137,27 mg/kg DM for Guinea grass and leucaena in the dry and rainy season, respectively. In turn, the concentration of even-chain alcohols for leucaena showed a higher value (2 754,60 and 3 830,18 mg/kg DM for the dry and rainy season, respectively), than in Guinea grass (2 571,73-3 679,65 mg/kg DM for each season, respectively). The concentration of long odd chain n-alkanes was concluded to be low for P. maximum and L. leucocephala in both seasons; however, they showed high concentrations of long even chain alcohols, which could be used as natural markers in both species.

Keywords : Alcohols; L. leucocephala; n-alkanes; P. maximum; cell wall.

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