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Effect of Seedling Numbers and Seedling ages on Yield and Growth of Japonica Rice |
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| รหัสดีโอไอ | |
| Creator | Nivat Nabheerong |
| Title | Effect of Seedling Numbers and Seedling ages on Yield and Growth of Japonica Rice |
| Contributor | Chutiwat Wannasai, Winyoo Wong-Ubol |
| Publisher | Department of Agriculture |
| Publication Year | 2537 |
| Journal Title | Thai Agricultural Research Journal |
| Journal Vol. | 12 |
| Journal No. | 1 |
| Page no. | 24-28 |
| Keyword | japonica rice, seedling numbers, ages, yield |
| URL Website | https://at.doa.go.th/journal |
| Website title | Thai Agricultural Research Journal |
| ISSN | 0125-8389 |
| Abstract | Field experiment was conducted at Phitsanulok Rice Research center during dry season 1992 to determine the effect of seedling numbers and ages on yield and growth of japonica rice (var. Koshihikari) in thailand environment. A split plot design was used with seedling ages (20 -, 25-and 30-day-old) as the main plots and seedling numbers (1, 3 and 5 seedlings/hill) as the subplots. Treatments were with 4 replications. Seedlings were hand trasplanted in 20x20 cm spacing. Fertilizer N (16-20-0) at 40 kg/rai was applied as basal incorporated at 1 day before transplanting and topdressing at panicle inition (PI) stage by 15 kg/rai of urea (46-0-0). Results showed that different seeding ages significantly affed plant height, tiler number and dry matter at 5-7 days before PI but at crop maturity, seedling ages did not affect tiller production. Seedling number perhill significandly affected tiller production at all growth stages butdid not affect plant height at flowering and crop maturity. Seedling at 25-day-old and 3 seedlings/hill tended to give hightest dry matter. Twenty-day-old-seedlings gave highest spikelets per panicles but did not significant differ from 25 and 30-day-old seedlings. Five and 3 seedlings per hill provided similar panicles perhill but but higher than 1 seeding per hill. However, 1 seedling per hill gave highest spikelets per panicle. There were no significant diferences on percentage of unfilled spikelets and 1,000 grains weight. Three seedlings per hill and 25-day-old seedlings gave the highest grain yield. |
