Seed Germination and Effects of Three Watering Regimes on the Growth of <i>Dialium guineense</i> (Wild) Seedlings

Abstract

The effectiveness of three pre-germination treatments in breaking dormancy of the seeds of Dialum guineense and effects of three watering regimes on the growth performance of the seedlings were investigated. The pre-germination treatments were: soaking in hot water for 10 seconds and cooling down in cold water (T 1 ), soaking in cold water for 24 hours (T 2 ), soaking in running water for 48 hours (T 3 ) and control (T 4 ), while watering regimes include: watering once daily in the morning (W 1 ), watering once every two days in the morning (W 2 ) and watering once every three days in the morning (W 3 ). The results showed that germination occurred first at 5 days after sowing (5 DAS) among the seeds soaked in cold water for 24 hours before sowing (T 2 ), while the untreated seeds (control) took the longest period of 12 days before germination occurred. T 1 had the highest germination value of 49.6% while T 3 had the least of 31.2%. The effects of watering regimes were found to be significantly different on stem-collar diameter, leaf area and total dry weight (P < 0.05). The least significant difference (LSD) test showed that W 2 and W 3 supported the best growth performance. It is concluded from the results that T 2 should be adopted for breaking the dormancy of Dialium guineense seeds and watering interval of three days would not dispose the seedlings to water-stress.

Effect of Watering Regimes on Early Seedling Growth of Solanum macrocarpon L. (Solanaceae)

“…2). This is similar to the findings of Oladeji et al 5 who reported that plant height of Dialium guineense was not significantly affected by watering regime. Seedlings subjected to watering once a week had the highest plant height of 11.75 cm followed closely by those watered everyday (11.25 cm).…”

“…Vegetable species are plants of great nutritional and medicinal importance especially to man, even though some of these species are gradually being eroded. Physiological and ecological information needed on these plant species include flowering and fruiting patterns, seed germination and growth requirement in order to facilitate domestication and improvement of their potentials 5 .…”

Effects of Water Stress on Growth and Chlorophyll Contents of Ocimum gratissimum L. (Basil) [Lamiaceae]

“…However, the reduced girth found in water deficit O. gratissimum could be because of dehydration of the plant which must have caused reduced photosynthetic activities of the plants [32] . The findings of this study corroborate that of Olajide et al [33] who reported a significant difference in Dialium guineense seedling girth due to the application of different watering regimes. However, a contrasting result was submitted by Gbadamosi [3] who reported that girth of seedlings was not significantly (p < 0.05) different under watering regimes and water quantity.…”

Crecimiento plantular en condiciones de invernadero de la especie forestal Dialium guianense (Aubl.) Sandwith

“…Taub. (Caesalpinoideae) Alves et al (2013) Investigaciones sobre D. guineense han reportado longitudes del tallo de 10.4 cm a 90 después del trasplante (Olajide et al, 2014) y de 9 cm a 177 días (Orhue, 1997) para la misma especie africana.…”