تأثير حامض الجبرلين في نمو و حاصل ثلاثة أصناف محلية من الرز Oryza sativa L.

الملخص EN

The study was conducted at Mishkab Rice Research Station at Al-Najaf Governorate during two growing season of 2012 and 2013 to investigate the effect of Gibberellic acid levels (0, 100, 200) mg.L-1 on growth and yield of three local Rice cultivars (Anbar33, Yassmen and Furat).

The layout of the experiment was conducted split-plot with a R.C.B.D with three replications.

Gibberellic acid levels were put in the main plots while cultivars were put in the sub-plots, analysis of variance and their means were compared according to L.S.D.

at level of 0.05.

Results showed that spraing of the Gibberellic acid level of 200 mg.

L-1 to gave a higher percentage of values of number of days from sowing to physiological maturity, plant height, number of active tillers in m2, 1000 grain weight, biological yield , grain yield and harvest index.

There ware a significant differences between cultivars, Furat cultivar was superior in trwament giving the highest grain yield and 1000 grain weight compared with Anber 33 cultivar also gave the higher values of days from sowing to physiological maturity 136,137 day and plant height 136,136cm each season.

Yassmen cultivar non significant difference with Furat cultivar in percentage for zero fertility 5,8 % each season, respectively.

There were significant interactions between Gibberellic acid levels and cultivars, the treatment of GA200 with Furat cultivar eaused noted increase as.

Compared to the other treatments for studied in all properties.