EFFECT OF SEED STIMULATION ON GROWTH AND YIELD OF SOME RICE CULTIVARS

.A . Jaddoa, Khdhayer; .L .Attiya  AL-Selawy, Razaq

	EFFECT OF SEED STIMULATION ON GROWTH AND YIELD OF SOME RICE CULTIVARS
The Iraqi Journal of Agricultural Science
Article 1, Volume 43, Issue 5, 2013, Pages 1-12
Authors
Khdhayer .A . Jaddoa; Razaq .L .Attiya AL-Selawy
Abstract
A field trial carried out factorial experiment at Al-Mishkhab Rice Research Station. Al-Najaf Al-Ashraf Governorate during the summer season of 2008 and 2009. The aim was to investigate the effect of seed enhancement on , growth and grain yield of three rice (Oryza sativa L.) cultivars. The design of lab. Experiment was R.C.B.D with four replicates. Each experiment consisted of two factors : seed enhancement treatments (T1 = un soaked dry seeds) , (T2 = seeds soaked only with water) , (T3 = seeds soaked with gibberellic acid (GA3) 300 mg. litre-1) , (T4 = seeds soaked with 600 mg.litre-1 GA3) , (T5 = seeds soaked with 900 mg.litre-1 GA3) , (T6 = seeds soaked with 10 g.litre-1 KCl) , (T7 = seeds soaked with 20 g.litre-1 KCl) , (T8 = seeds soaked with 10 mg.litre-1 Ascorbic acid) , T9 = seeds soaked with 20 mg.litre-1 Ascorbic acid) , and (T10 = seeds soaked with 30 mg.litre-1 Ascorbic acid). The second factor was three rice cultivars (Anber -33 , Yasamin and Furata-1 (Al-Fawwah). Results of the field trial revealed that T3 treatment gave the highest values of the flag leaf area , plant height , number of bearing – panicles tillers , number of grains . panicle-1 , grain yield and harvest index (30.4 cm2 , 104 cm , 332 , 167 , 6.2 t.ha-1 , 51% and 31.5 cm2 , 99 cm , 342 , 171 , 6.3 t.ha-1 and 49 %) in both seasons , respectively . . Anber -33 gave the highest averages of flag leaf area , plant height (35.3 , 39.4 cm2 , 131 , 125 cm) in both seasons , respectively. While Furat-1 gave the highest average of number of bearing – panicles tillers , 1000 grain weight , grain yield and ultimately harvest index (344 , 344 , 24.2 , 23.6 gm , 6.1 , 6.2 t.ha-1 , 48and 49% in both seasons , respectively . The results also showed a significant interaction between seed enhancement treatments and cultivars in the most studied characters. It can be concluded from this study that , in general, seed enhancement treatments increased for all cultivars and improved the growth characters and ultimately the grain yield via the increase of most its components. Also rice seeds soaked with gibberellic acid (GA3) 300 mg. litre-1 may increase grain yield .

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