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| 1 | Effects of variation in seed sources and pre-sowing treatments on seed germination of Tamarindus indica: a multi-purpose tree species in Bangladesh显示文摘We investigated the morphology and germination of Tamarindus indica seeds in order to discover the effects of variation in seed sources and pre-sowing treatments on germination. The experiment was carried out in the nursery of the Forestry and Wood Technology Discipline, Khulna University, Bangladesh. Seeds were collected from different but healthy trees from various locations in Bangladesh and subjected to four pre-sowing treatments, i.e., control, immersion in cold water (4°C for 24 h), immersion in hot water (80°C for 10 min) and scarification with sand paper. Seed germination was carried out in poly-bags with a mixture of topsoil and cow dung in the ratio of 3:1. The average length of the fresh seeds was 1.35±0.26 cm, their width 1.07 ±0.20 cm and thickness 0.69±0.11 cm. The results revealed that pre-sowing treatments affected the germination process of seeds, which significantly increased the germination percentage with the cold water (81.67%) and scarification with sand paper (82.33%) treatments, compared with those in the control (58.33%) and hot water treatment (59.00%). In all treatments germination started on average within 5 to 7 days after the start of the treatments and were completed from 13 to 19 days later. The greatest success in germination (82.33%) was found in scarification with sand paper, followed with 81.67% in the cold water treatment. The results of analyses of variance (ANOVA) showed significant differences (p<0.05) in germination closing dates, seed germination periods and germination percentages among the treatments but no significant difference among seed sources. However, the effect of the interaction between seed source variation and pre-treatment differed significantly in seed germination closing dates and germination percentages. We recommend cold water treatment (submersion of seed at a temperature of 4°C for a 24-h period) for seed germination of T. indica in rural Bangladesh. | Md. Salim AZAD Nurun NAHAR Md. Abdul MATIN | 2013 | Forestry Studies in China2013，15，2： | 3 |
| 2 | Effect of seed treatment for laboratory germination of Albizia chinensis显示文摘Seeds of Albizia chinensis(Osb.) Merr.in addition to water were also treated with different treatments by incubating in ethyl alcohol,acetone, and petroleum ether at room temperature for different durations.Seed heat treatment was done at temperatures of 30, 40 and 60oC for different durations up to 24 h.To overcome dormancy caused by the impermeable seed coat, seeds were nicked and also treated with concentrated sulphuric acid for different durations.Seeds responded to treatments with sulphuric acid and nicking only.Treatment with sulphuric acid for 20 and 30 min showed maximum germination at all incubation temperatures as compared to untreated controls and seeds treated with sulphuric acid for 10 min and nicking.Seedling length was greatest from seeds treated with sulphuric acid for 20 and 30 min and incubated at 30oC.Seedling dry weight was highest from nicked seeds incubated at 20oC.The most favourable incubation temperature was 30 oC as evidenced from GRI(germination rate index) and GV(germination value).After ascertaining the seed response and performance we recommend that seeds of Albizia chinensis be treated with sulphuric acid for 20 or 30 min and incubation temperature of 25 to 30oC. | A.Nongrum L.Kharlukhi | 2013 | Journal of Forestry Research2013，24，4： | 1 |
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