اثر تلقيح بذر با كود زيستي نيتراژين بر جوانه زني و رشد اوليه كلزا (Brassica napus L)، كنجد (Sesamum indicum L) و آفتابگردان (Helianthus annus L)

Effect of seed inoculation with nitragin biofertilizer on germination and primary growth of rapeseed (Brassica napus L.), sesame {Sesamum indicum L.) and sunflower (Helianthus annus L.)

Effects of seed inoculation with different concentrations of nitragin (2, 3, 4 cc and control) on germination and primary growth of rapeseed {Brassica napus L.), sesame (Sesamum indicum L.) and sunflower (Helianthus annus L.) was evaluated in a completely randomized design with three replications in Islamic Azad University of Tabriz. Based on the results, rapeseed inoculation with 2 cc nitragin increased radicle and plantlet length up to 110 % and 60 %, respectively, compared with control. When sesame seeds inoculated with 4 cc nitragin, radicle length reached from 38 to 75 mm (48% increase). Application of 2 and 3 cc nitragin could increase plumule length of sesame up to 31%, compared with control. Inoculation of seeds with 2, 3 and 4 cc biofertilizer increased germination rate of sesame up to 26 %, 48 % and 14 % respectively, and reached from 0.16, 0.19 and 0.15 to 0.13 germination per day. According to major role of seed germination rate in uniform emergence of field, it is recommended that sesame seeds were planted after inoculation with 3 cc nitragin. Effect of seed inoculation on sunflower plantlet length was significant and the highest plantlet length (42 mm) was observed in seed treatment with 4 cc nitragin. It seems that relative improvement of plantlet length in presence of nitragin could play an important role at uniform emergence of plants in field.