The Effects of Seed Inoculation with Rhizobium and Nitrogen Application on Yield and some Agronomi Characterstics of Soybean (Glycine max L.) under Ardabil Condition

پژوهشهای زراعی ایران

Article 9, Volume 11, Issue 4 - Serial Number 32, January 2014, Pages 618-628   

Document Type: Research Article

DOI: 10.22067/gsc.v11i4.32688

Author

R Seyedsharifi

Abstract

In order to study the effects of seed inoculation with rhizobium and nitrogen application on yield and some agronomic characterstics of soybean (Glycine max L.), a spilt plot experiment based on randomized complete block design with three replications was conducted in 2011 at the research farm of the Islamic Azad University, Ardabil Branch. Factors were inorganic nitrogen fertilizer urea at four levels (0, 30, 60 and 90 kg urea/ha) in the main plot and two levels of inoculation with Rhizobium japanicum bacteria (with and without inoculation) assigned to the sub plots. Study the growth indices showed that the maximum total dry matter (435.4 gr/m2 ), crop growth rate (6.75 gr/m2.day) and relative growth rate (0.1003 gr/gr.day) were obtained from compound of treatments high levels of urea application × inoculation with rhizobium while, the minimum values of these indices recorded in without nitrogen application×non inoculation with rhizobium. The highest plant height, number of pod per plant and grain yield were obtained from the highest level of nitrogen fertilizer (90 kg/ha urea) and seed inoculation with rhizobium. Number and dry weight of nodules per plant increased significantly with increasing nitrogen application till 60 kg/ha in seed inoculation with rhizobium. The lowest values of these traits recorded in non application of urea×non inoculation with rhizobium. Inoculation with rhizobium bacteria increased the number and dry weight of nodules per plant. Thus, it can be suggested that in order to increasing of grain yield, seed can be inoculated with rhizobium bacteria × application of 60 kg urea/ha in conditions of Ardabil region.

Keywords

Nitrogen; Soybean; Seed inoculation; yield