Volume 9, Issue 36 (vol. 9, no. 36 2020)                   2020, 9(36): 279-298 | Back to browse issues page

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Niazi Ardakani M, Barati V, Bijanzadeh E. Physiological and biochemical characteristics of barley as affected by biofertilizer, crop residues and water stress. Plant Process and Function 2020; 9 (36) :279-298
URL: http://jispp.iut.ac.ir/article-1-1290-en.html
1- Shiraz University
2- Shiraz University , v.barati@shirazu.ac.ir
Abstract:   (1818 Views)
This research was carried out at the experimental farm of the Darab Agricultural and Natural Resources College of Shiraz University during 2017-2018 growing season. A split factorial experiment was layout based on a randomized complete block design with three replicates. Treatments included two irrigation levels as the main plots [1. Normal (IRN): irrigation based on the plant's water requirement up to the physiological maturity and 2. Irrigation with water stress (IRws): irrigation based on the plant's water requirement up to the anthesis stage (cutting of irrigation after anthesis)]. Also, sub plots were two levels of plant residues [1. without residue, 2. with residue: returning 30% of wheat residues to soil] and four nitrogen (N) fertilizer sources [N0, no nitrogen fertilizer (control); N100, 100 kg N ha-1; Bio + N50, Biofertilizer (Azospirillum brasilense) + 50 kg N ha-1 and Bio, Biofertilizer (Azospirillum brasilense)]. Results showed that the interaction effect of residue × N fertilizer source on chlorophylla, carotenoid, catalase and guaiacol peroxidase enzymes traits was significant. The N100 and Bio + N50 treatments significantly increased these traits compared to N0 in without residue conditions. In contrast, in the presence of residue, there was a similar trend to without residue conditions, however, the reaction of these traits to N100 and Bio + N50 supply were much more severe. The interaction of irrigation regime × N fertilizer source on catalase and guaiacol peroxidase enzymes showed that the N fertilizer application increased the amount of these enzymes, regardless of the N source, in IRN conditions. Similarly, in IRws conditions, the catalase and guaiacol peroxidase enzymes levels improved by N fertilizer supply as compared with N0, however, the intensity of their reactions to N application, especially, N100 and Bio + N50 were much more than the normal moisture conditions. The highest grain yield was achieved by Bio + N50 under IRN and IRws conditions. In general, with respect to superiority of combine N fertilizer (Bio + N50) in biochemical and grain yield traits in normal and water stress conditions and economic and environmental considerations as well, this N fertilizer regime is recommended for water availability restriction conditions in Southern regions of Iran.
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Type of Study: Applicable | Subject: Droughts Stress
Received: 2019/07/31 | Accepted: 2019/11/2 | Published: 2020/04/29

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