Paper Details

Wheat response to plant growth promoting rhizobacteria, humic acid and sn-brassinolide

Pezhman Haghighi, Davood Habibi, Behzad Sani

DOI: https://dx.doi.org/10.12692/ijb/5.10.51-60

Int. J. Biosci. 5(10), 51-60. November, 2014. (PDF)

Abstract:

In order to study the effect of non-chemical sources of nutrients and phytohormone like substances on wheat growth, yield and yield components, this experiment was conducted in 2013 at the research field of Islamic Azad University, Karaj branch, Iran. The experiment was conducted in factorial in the form of a randomized complete block design with four replications and three treatments: (1) humic acid in two levels including 0 and 7L/ha, (2) plant growth promoting rhizobacteria application in two levels including without inoculation and inoculation of a bacterial mixture (Azotobacter chroococcum + Azospirillum lipoferum + Pseudomonas putida) with seed, and (3) Brassinolide application in four levels including 0, 30, 50 and 70 ml/ha. Analysis of variance showed that Brassinolide, humic acid and PGPR had significant effect on all measured traits including plant height, grain weight, dry weight, the number of grains in spike, spike length, 1000 grain weight, the number of tillers and the harvest index. The three-fold interaction of the three factors had only a significant effect on plant height, total dry weight, spike length, 1000 grain weight and the number of tillers. The interaction of 70 ml/ha Brassinolide × humic acid application × PGPR application was the most effective treatment of this experiment which increased plant height by 42%, total dry weight by 68%% and 1000 grain weight by 35% compared with the control.