The survey of zeolite application and manganese on yield, oil content and seed glucosinolate rapeseed cultivars in different irrigation regimes

In order to study the effect of zeolite super absorbent and manganese, on morpho-physiological traits of rapeseed cultivars in different irrigation treatment, an experiment was performed during two years of 2012-13 and 2013-14, as factorial split plot design on the base of completely randomized block design with three replicates in research farm of Shahryar. Irrigation factor was included three levels, irrigation on the base of 40, 60 and 80 % discharge of irrigation, zeolite factor was included two levels of zero and 15 (ton/ha), manganese factor (manganese sulfate) was included two levels of 0 and 3(g/1000), as factorial were set in the main plots and cultivar factor in four levels including SLM046, Talayeh, Modena and Opera were set in subsidiary plots. Results indicated that applying zeolite in the soil and foliar manganese and increasing the irrigation of the soil, lead to increase the grain yield (6324 kg.ha-1) and seed oil contect (46.5 %). Maximum amount of seed yield in normal irrigation was achieved by application of zeolite in the soil and foliar manganese. Applying manganese and zeolite decreases the amount of seed glucosinolate in different irrigation treatments. Maximum amount of the seed glucosinolate was achieved in normal irrigation condition (16.5 mg/g) by Opera cultivar. With the respect to the low yield in arid and semiarid areas , it is recommended that due to increasing the yield, mineral zeolite in the soil and foliar manganese in different cultivars be used in order to increasing efficiency of the irrigation and yield.