EFFECT OF SEED STIMULATION ON GERMINATION AND SEEDLING VIGOUR OF SOME RICE CULTIVARS

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

	EFFECT OF SEED STIMULATION ON GERMINATION AND SEEDLING VIGOUR OF SOME RICE CULTIVARS
The Iraqi Journal of Agricultural Science
Article 1, Volume 43, Issue 5, 2013, Pages 13-23
Authors
Razaq .L .Attiya AL-Selawy; Khdhayer .A . Jaddoa
Abstract
A factorial experiment was conducted at the laboratories of the State Board for Seed Testing and Certification – Ministry of Agriculture – Karbala branch during 2009. The aim was to investigate the effect of seed enhancement on germination percentage , field emergence and its relationship with the field establishment , growth and grain yield of three rice (Oryza sativa L.) cultivars. The design of lab. Experiment was CRD while for the field trial 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 Lab. Experiment indicated that T7 , T4 and T3 treatments significantly increased the germination speed (92.83 , 89.67 and 82.00%) and standard germination percentage (95.50 , 95.33 and 94.67%) , respectively compared with the T1 treatment (control) which gave the lowest values of germination speed and standard germination parentage (20.67% and 75.50%), respectively . The T3 treatment was superior in giving the higher average of seedling vigour in the standard germination percentage (2280) compared with 1162 for T1 treatment (control) . Yasamin cultivar significantly gave the highest average of germination speed and standard germination percentage (52.52 and 88.30%) , respectively , while Furat-1 gave the lowest values (32.25 and 82.25%) 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 both standard germination percentage for all cultivars and improved the seedling characters.

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