Resumo

REYES, F et al. Generic composition of the soil seed bank in a multi-associated silvopastoral system (Technical note). Pastos y Forrajes [online]. 2013, vol.36, n.3, pp. 296-299. ISSN 0864-0394.

A study was conducted at the Experimental Station of Pastures and Forages «Indio Hatuey» in order to determine the composition, by genera, of the seed bank of a Ferralitic Red soil under livestock production; which was inserted in a multi-associated silvopastoral system with more than 10 years of exploitation. A randomized block design with three repetitions was used, and the treatments were the sampling depths 0-5 and 5-10 cm. The work was done in a 4-ha lot on which three strips were drawn, divided into 8 x 10 m plots. The soil samples were extracted from a 1-m² area. Eight grass and legume genera were identified; the most frequent ones were: Panicum (78,7 %), Leucaena (9,27 %), Neonotonia (6,03 %) and Teramnus (2,35 %). There were significant differences (p < 0,05) in favor of the depth 0-5 cm, in which the highest seed proportion was found. Neonotonia and Leucaena showed the highest percentage of hard seeds, although all the legumes showed high viability. It is concluded that there was a high reserve of Guinea grass seed in the soil of the multi-associated system, as well as diversity of legume genera. In addition, a high percentage of seed was found in the higher stratum of the soil (0-5 cm), which can constitute an advantage in the processes of pastureland renewal with these plants.

Palavras-chave : seed bank; silvopastoral systems.

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