Resumo

GONZALEZ, Yolanda; REINO, J; SANCHEZ, J. A  e  MACHADO, R. Effect of storage under ambient conditions on seeds from Leucaena leucocephala cv. Cunningham subject to partial hydration. Pastos y Forrajes [online]. 2012, vol.35, n.4, pp. 393-399. ISSN 0864-0394.

The objective of the work was to study the effect of storage under ambient conditions on the germination of seeds from Leucaena leucocephala cv. Cunningham subject to partial hydration. The treatments were: control, no scarification (T0); thermal scarification (TS) with H2O at 80ºC, for two minutes (T1); TS plus partial hydration, on tray with tap water for 28 hours (T2); TS plus partial hydration, in jute sac moist with tap water for 28 hours (T3); TS plus partial hydration in tray with tap water and TMTD at 0,1% (pesticide) for 28 hours (T4); TS plus partial hydration, in jute sac moist with tap water and TMTD at 0,1% (pesticide) for 28 hours (T5). The hydrated seeds were dehydrated during 72 hours exposed to air and under shade, before being stored. Germination and viability were measured after 0, 1, 2, 3, 4, 6, 18, 30 and 42 months. A completely randomized design and four replications per treatment were used. There were significant differences (P<0,001) among treatments regarding germination and viability. The highest germination values were detected in T2 and T3 at all times, except after 18 and 30 months, when they were only higher in T3. After 42 months there was 0% germination in all treatments, while the control reached 9,3%. On the other hand, viability showed higher values in T0. It is concluded that the seeds that were subject to the combination of the treatment with partial hydration, before being stored under ambient conditions, remained reinvigorated for germination until 30 months.

Palavras-chave : Seed storage; germination; hydration; Leucaena leucocephala cv; Cunningham.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )