اثر زمان هاي محلول پاشي آهن بر عملكرد و اجزاي عملكرد ارقام پاييزه كلزا (brassica napusl) در شهر ري

Effect of Iron spraying time on Seed Yield and Yield Components of winter rapeseed (Brassica napus L.) in Shahr-e-Rey

In other to study the effect of Iron spraying times on seed yield and yield components of Rapeseed cultivars in Shahr-e-Rey. An experiment carried out in factorial design in the basis of randomized complete blocks with 4 replications in 2007. Iron spraying time with 4/1000 concentration per hectare in 3 levels (Non spraying , spraying in stem elongation stage , Spraying in early flowering stage and Spraying in stem elongation stage and early flowering stage) and Rapeseed cultivars in 3 levels, Okapi, Licord and Opera considered. The variance analysis showed that instead of interaction effect of Iron spraying and cultivars on 1000 seed weight, In other cases single and interaction effect of Iron spraying, cultivars and interaction effect between them on pods per plant, seed number per pod , 1000 seed weight and seed yield had significant difference at %1 level. The results of cultivar mean comparing showed that Licord with 3923.06 Kg/ha and Opera with 3286.56 Kg/ha had maximum and minimum amounts of seed yield in average 3 levels of Iron Spraying time. Effect of Iron spraying time on seed yield showed that application of these elements in stem elongation stage and early flowering stage with 3953.25 Kg/ha and non application with 3140.25 gained to maximum and minimum amounts of seed yield. Mean comparison of interaction effect between Iron time application and cultivars showed that application of this essential element in two mentioned stage in Licord with 4454 Kg/ha and non application of that in Opera with 2787 Kg/ha produced highest and lowest seed yield Maximum amounts of all yield component observed in two stage Iron spraying time and in cultivars Licord, Modena and Opera alternatively.