Interaction effects of nitrogen and seed inoculation by free living nitrogen fixing bacteria on phyllochron, dry matter remobilization and their contribution to grain yield of wheat

Subject Areas : Journal of Plant Ecophysiology

R. Seied Sharifi ¹ (- گروه زراعت و اصلاح نباتات، دانشگاه محقق اردبیلی، اردبیل، ایران)
P. Ghanbari ² (- گروه زراعت و اصلاح نباتات، دانشگاه محقق اردبیلی، اردبیل، ایران)
H. Kamari ³ (گروه زراعت و اصلاح نباتات، دانشگاه محقق اردبیلی، اردبیل، ایران)

Received: 2015-09-24 Accepted : 2015-09-24 Published : 2015-09-01

Keywords: Yield, Wheat, Dry matter remobilization, leaf appearance rate, PGPR,

Abstract :

   In order to study the interaction effects of nitrogen and seed inoculation by free living nitrogen fixing bacteria on phyllochron, dry matter remobilization and their contribution to yield of wheat, a factorial experiment was conducted based on randomized complete block design with three replications in experimental field of Mohaghegh Ardabili University in 2012. Factors were: nitrogen rates in three levels (0, 60, 120 and 180 kg N ha-1) from urea and seed inoculation with free living nitrogen fixing bacteria in five levels containing: without inoculation (as control), seed inoculation with Azotobacter chroococcum strain 5, Azospirillum lipoferum strain OF, Psedomunas  putida strains of  4  and 11. Results showed that maximum of grain yield (3829.5 kg/ha), yield components and leaf appearance rate belonged to application of N180×seed inoculation with Azotobacter and minimum was obtained from N0 × control. Maximum dry matter remobilization from stem and shoot organs was obtained from N0× control. In conclusion, to increase grain yield and decrease phyllochron, application of N180 × seed inoculation with Azotobacter  can be recommended.