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2 resultados encontrados para: AUTOR: Escobedo Mex, José Guadalupe
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Fine root density and vertical distribution of Leucaena leucocephala and grasses in silvopastoral systems under two harvest intervals
Montejo Martínez, David (autor) ; Díaz Echeverria, Víctor Francisco (autor) ; Villanueva López, Gilberto (autor) ; Aryal, Deb Raj (autor) ; Casanova Lugo, Fernando (autor) ; Canul Solís, Jorge Rodolfo (autor) ; Escobedo Mex, José Guadalupe (autor) ;
Disponible en línea
Contenido en: Agroforest Syst Volumen 94, número 3 (June 2020), páginas 843-855 ISSN: 1572-9680
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Resumen en: Inglés |
Resumen en inglés

Understanding belowground morphological mechanisms of trees and grasses is a complicated task but can help in the design and management of silvopastoral systems. In this study, we evaluated the effect of the harvest intervals (i.e. 30 and 50 days) of aboveground biomass on the fine root density and vertical distribution in two silvopastoral systems (SPS): one comprising Leucaena leucocephala (legume tree) and Cynodon plectostachyus (grass) and the other L. leucocephala and Panicum maximum. We used a completely randomized design with four repetitions. We sampled fine roots by using a metal cylinder (8 cm diameter and 50 cm length) 7 days after each harvest. We washed the samples with pressurized water to separate them from the soil. The roots were digitalized at a resolution of 600 dpi to determine the diameter and specific root length by using IJ Rhizo Ò software. Samples were subsequently dried to quantify fine root mass. We found that the greater percentages of fine roots were between 0.4 and 0.8 mm for the legume and between 0.2 and 0.4 mm for grasses. The fine root length and mass density of P. maximum was higher (P\0.001) compared to C. plectostachyus in both harvest intervals. However, the fine root density of L. leucocephala did not vary between SPS (P> 0.05). The effect of harvest interval was significant only in some soil layers in both SPS (P> 0.05). Most of the pasture roots were found in the upper soil layer (0–20 cm), while L. leucocephala roots were present to deeper soil layers. We conclude that P. maximum has a greater rooting capacity and amore rapid recovery than C. plectostachyus, which has greater diameters and lower root density. However, L. leucocephala presented deeper and thicker fine rootsin both SPS, which is a good indication of its belowground recovery capacity to aboveground disturbances.

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Contenido nutritivo y factores antinutricionales de plantas nativas forrajeras del norte de Quintana Roo
López Herrera, Maria Aurelia ; Rivera Lorca, Juan Antonio (coaut.) ; Ortega Reyes, Luis (coaut.) ; Escobedo Mex, José Guadalupe (coaut.) ; Magaña Magaña, Miguel Ángel (coaut.) ; Sanginés García, José Roberto (coaut.) ;
Contenido en: Técnica Pecuaria en México Vol. 46, no. 2 (abril-junio 2008), p. 205-215 ISSN: 0040-1889
Nota: En hemeroteca, SIBE-Tapachula