Effects of Water Depths on Growth, Yield and Grain Quality of DKML 105

Abstract

The experiment was carried out during July - December, 1992 at Phitsanulok rice Research Center by using KDML 105, an aromatic rice variety transplanted at 25x25 cm spacing. The experiment design was RCB with 4 replications and 5 treatments (levels of water depth) as 0 (saturated soil), 5 10 15 and 20 cm. The results showed that KDML 105 grown under 0 5 10 and 15 cm water depths had higher tiller numbers and grain yield, but lower plant heights than that of under 20 cm. Rice at 0 cn yielded 659 kg/rai which was 109 kg/rai or 19.8 percent higher thanb that of at 20 cm. Physical grain quality were not significantly different expcept head rice of the 20 cm treatment was slightly lower than those of the theres. Chemical grain quality was not affected by different water levels.