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Articles by J.B.K. Asiedu
Total Records ( 2 ) for J.B.K. Asiedu
  J.B.K. Asiedu , E. Asare-Bediako , K.J. Taah and J.N. Buah
  The aim of the present study was to investigate the effect of various pre-sowing treatments on the germination of Bauhinia rufescens seeds. The pre-sowing treatments were made up of boiling seeds in water for up to 15 min and soaking seeds in water at room temperature for a number of days. Data collected was used to calculate cumulative germination percentage, germination value, speed of germination, mean daily germination and coefficient of velocity and was analyzed using analysis of variance at 5%. Treatment 1 (<10 sec boiling) produced the highest cumulative germination percentage of 77. Soaking seeds in water at room temperature for any number of days (T3, T4, T7, T11, T14) did not have any significant effect on germination, neither did boiling seeds for 15 min (T2) and the control (T15). Apart from T1, all the other treatments had a cumulative germination percentage of less than 20 at the end of the experiment. Boiling of Bauhinia rufescens seeds in water for less than 10 sec (T1) proved to be the most effective pre-sowing treatment to enhance germination under field conditions. Soaking of seeds in water for any number of days could not improve germination.
  J.B.K. Asiedu , G.C. van der Puije , K.J. Taah and V. Dovlo
  The study aimed at investigating the effect of chemical pre-sowing treatments on the germination of Bauhinia rufescens seeds. The pre-sowing treatments were made up of five different dilutions of concentrated sulphuric acid (10, 30, 50, 70, 90%), gibberellic acid (0.01, 0.03, 0.05, 0.07, 0.09) and potassium nitrate (0.1, 0.3, 0.5, 0.7, 0.9) and a control treated with distilled water. Pure seeds of Bauhinia rufescens were soaked in the various dilutions of sulphuric acid for 30 min while that of gibberellic acid and potassium nitrate were soaked for 24 h. The control was soaked in distilled water for all the respective treatments. The study lasted for 12 days during which data was collected daily on germination which was used to calculate germination capacity, germination value, germination rate, germination energy and coefficient of velocity of germination. Data was analysed using general analysis of variance at 5% significance level. There were significant differences between the treatments and interactions between the treatments and sub-treatments including the control were also significant. Sub-treatment 5 of treatment 1 (sulphuric acid) produced the highest germination capacity of 93.8% and had the highest germination energy at 7, 10 and 12 days after sowing. It produced the lowest germination rate at 25, 50 and 75% and had the highest coefficient of velocity of 69. Other sub-treatments which also had high germination capacity were sub-treatment 4 of treatment 1 (89.0%), sub-treatment 5 of treatment 2 (88.5%), sub-treatment 4 of treatment 2 (76.5). Germination capacity increased with increasing concentration for all treatments. Only sub-treatments 5 and 4 of treatments 1 and 2 attained 75% germination rate. The results showed that Sulphuric acid at 90% concentration was the most effective pre-sowing treatment for the germination of Bauhinia rufescens seeds followed by 70% concentration and that potassium nitrate was the least effective.
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