Effect of soaking seeds with pyridoxine on grain yield and its components for four oats Avena sativa L.

The field experiment was carried out at a farm located in Al- Bathaa region west province of Dhi Qar during two winter seasons 2014-2015 and 2015-2016 .The experiment was designed to study the effect of soaking seeds with pyridoxine on some characteristics of yield for four varieties of Oat. The experiment was layout using R.C.B.D. arranged in split – plot with three replications. Varieties (Shifaa , Carrolup , Genzania and Alguda ) were using as a main plots, while pyridoxine concentration ( 0 , 1.5 , 3.0 and 4.5 ) gm L-1 were using as a sub-plots. In experiment the following traits were studied :- Number panicles m-2 , Number of grains panicle -1 , 1000 grain weight , Grain yield , Biological yield and harvest index.The data obtained from the experiment were analyzed according to analysis of variance methods. Means were compared using L.S.D. test at 5 % level and the results could be summarized as follows :- In both seasons soaking with pyridoxine at concentration at 4.5 gm L-1 gave significantly highest number of panicles m-2 number of grains panicle -1 , 1000 seed weight , grains yield, biological yield and harvest index. This increment in yield components reflect positively on grains yield per unit area, since in first season it produced 11.24 ton.ha-1 and in second season 13.08 ton.ha-1 .There was positive and significant linear relationship between increment in pyridoxine concentration and grain yield in first and second season since seeds soaking at concentration ( 1.5, 3.0, 4.5 ) gm L-1 resulted in increment in grains yield amounted to ( 8.7 % , 12.5 % , 24.5 % ) and (11.7 % , 23.3 % , 27.2 % ) compare with control treatment respectively. There were significant interaction between varieties and pyridoxine concentration in all growth traits, grain yield components and grain yield. Since variety Genzania gave highest grain yield in first season amounted to 12.14 ton. ha-1 when it's soaked with high concentration of pyridoxine while in second variety Shifaa gave highest grain yield amounted to 16.03 ton. ha-1 when it also soaked with high concentration of pyridoxine .