Terminal drought and crop sequence effects on irrigated wheat grain yield and quality under conventional and conservation managed approaches

Document Type : Research Paper


1 Ph.D. Candidate, University College of Agriculture & Natural Resources, University of Tehran, Alborz, Karaj, Iran

2 Professor, University College of Agriculture & Natural Resources, University of Tehran, Alborz, Karaj, Iran

3 Assistant Professor, Seed and Plant Improvement Institute, Karaj, Iran


No-tillage managed approach with the proper crop sequence can provide more moisture and nutrients necessary for the plant in water stressed conditions. This experiment was conducted in 2013-15 cropping years to study the effects of terminal drought and sequential cropping systems on grain yield and quality of no-till and conventional managed irrigated wheat CV. Parsi. The experimental design was RCBD in split plot arrangement with four replicates in experimental farm of cereals research department of seed and plant improvement institute at Karaj, Iran. Main plots consisted six irrigated wheat based crop sequences and two irrigation regimes of normal irrigation and terminal drought allocated to the subplots which were studied in two separate experiments of conservation and conventional managed approaches. According to the results effect of terminal drought in conventional approach was significant in both years of study with 18% grain yield reduction. But terminal drought in conservation approach had no significant grain yield reduction (about 8% reduction) in the first year but caused significant grain yield reduction (about 43%) in the second year. In the 1st year of conservation approach, crop sequence of two years four crops of wheat/berseem clover-canola/silage corn (T3) produced the highest grain yield (4089 kg ha-1), while the highest grain yield (5347 kgha-1) belonged to the crop sequence of wheat/silage corn-wheat-silage corn (T1) in the conventional managed approach.Wheat grain quality characteristics were not significantly affected by terminal drought and crop sequence in both years of study.


Main Subjects

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