Resumo

GONZALEZ, Yolanda; SANCHEZ, J. A; REINO, J  e  MONTEJO, Laura A. Effect of hydration-dehydration treatments on the germination, emergence and vigor of Albizia lebbeck and Gliricidia sepium seedlings. Pastos y Forrajes [online]. 2009, vol.32, n.3, pp. 1-1. ISSN 0864-0394.

The effect of hydration-dehydration treatments on the germinative response, emergence and vigor of Albizia lebbeck and Gliricidia sepium seedlings was studied under different controlled conditions of caloric stress of the substratum. The treatments were: non hydrated seeds (T1); seeds hydrated until the end of stage I (T2); seeds hydrated until two hours before the beginning of visible germination (T3) and they were later dehydrated for 48 hours. A. lebbeck seeds were scarified with water at 80ºC for 2' before hydrating. The seed germination of both species depended significantly on the interaction between the substratum temperature and hydration (P<0,001). In G. sepium the best results in germination were obtained with long periods (stage III), and in A. lebbeck with short periods (stage I). The emergence showed significant effects due to the positive effects of scarification-partial hydration treatments in A. lebbeck (34 vs 10% in fresh and aged seeds, respectively) and without their combination in G. sepium (12 vs 8% in fresh and aged seeds, respectively). There was a significant increase in plant growth and development. The hydric treatments were concluded to revigorize the aged and fresh seeds from A. lebbeck and G. sepium; for which their application under similar conditions as in this study is recommended.

Palavras-chave : Albizia lebbeck; germination; Gliricidia sepium; seeds.

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