Resumo

YERENA-YAMALLEL, José I.; JIMENEZ-PEREZ, Javier; ALANIS-RODRIGUEZ, Eduardo  e  AGUIRRE-CALDERON, Oscar A.. Carbon concentration in shoots and roots of different grass species in Nuevo Leon, Mexico. Rev. fitotec. mex [online]. 2020, vol.43, n.2, pp.189-195.  Epub 24-Mar-2021. ISSN 0187-7380.  https://doi.org/10.35196/rfm.2020.2.189.

In Mexico, studies on the evaluation of the carbon concentration coefficient in grasses are of great importance, but there is no information about it. In this study, the concentration of C in shoots and roots of 21 grass species was determined. The study was carried out during April and May 2018 in the municipalities of Linares and Montemorelos, Nuevo Leon, Mexico. A total of 378 samples was analyzed from 21 species, three sites per species, and two components per site; the measurements were made in triplicate. The concentration of C was obtained with the Solids TOC Analyzer. The average C concentration in the species ranged from 32.5% in Paspalum notatum Flügge to 39.9 % in Setaria viridis (L.) P. Beauv., with an overall average of 36.4 %. The concentration of C in the root component of all the species was 36.0 % and 36.9 % in the shoot. Pennisetum ciliare (L.) Link showed the highest C concentration in the shoot (41.9 %), and P. notatum displayed the lowest value (33.2 %). The average percentages of root C content among the species ranged from 31.8 % in P. notatum to 39.8 % in Cynodon plectostachyus (K. Schumann.) Pilg. An overestimation of the carbon sequestered in grasses results from using a generalized value for total carbon concentration.

Palavras-chave : Paspalum notatum; Setaria viridis; induced grassland; Tamaulipan thorn scrub.

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