Record ID No. |
673 |
Author(s) |
Miri, M.R., Moghadam, H.R.T., Ghooshchi, F., Zahedi, H. , 2012 |
Affiliation |
Department of Agronomy Varamin-Pishva Branch, Islamic Azad University, Varamin, Iran |
Title |
Growth, seed yield and phosphorus uptake of wheat as influenced by Azotobacter and arbuscular mycorrhizal colonization under drought stress conditions |
Source. Vol.(no):Page |
Research on Crops, 13 (1): 21-28p. |
Categories |
Arbuscular Mycorrhiza |
Subjects |
Biological Interaction |
Sub-subjects |
Mycorrhiza helper bacteria |
Host |
Triticum aestivum |
Organism |
Azotobacter |
Country |
Iran, Asia |
Abstracts |
The field experiment was carried out in 2010-11 at Agricultural Research and Natural Resources Center of Varamin, Iran. The experiment was organized in a randomized complete block design, with factorial split plot arrangement, with three replications. Main plots were three irrigation treatments containing (normal irrigation, non-irrigation at start of flowering stage (severe stress) and non-irrigation at start of grain filling stage and subplots were four levels of seed inoculations with biofertilizers (no inoculation, inoculation with mycorrhiza fungus, inoculation with Azotobacter bacterium and co-inoculation with mycorrhiza fungus plus Azotobacter bacterium). The results showed the effect of drought stress during reproductive stage on grain yield biological yield and protein percentage was significant at 1% and for harvest index, spike weight, number óf spikes per m2, number of kernels per spike and phosphorus percentage was significant at 5%. The grain yield decreased by 16 and 30% for light and severe stress, respectively. Grain wheat quality was significandy affected by drought stress at reproductive stage. Protein and phosphorus percentages increased with drought stress treatments but it was significant only for severe stress condition. All traits except significantly affected by both inoculums. For many traits, the most effect of inoculation belonged to dual inoculation treatments. The mutual effects of two irrigation and seed inoculation treatments were not significant for traits. Wheat grain yield was significantly increased for all three inoculation treatments. This increase was 21% for mycorrhiza, 13.3% for Azotobacter and 17.4% for dual inoculation, compared with evident. Protein percentage increased for all the three inoculation treatments. |