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The effect of time and amounts of humic acid foliar application on wheat (Triticum aestivum L.) yield and yield components in post anthesis heat stress conditions
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Somayeh Eskandary   |
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Abstract: (103 Views) |
| In order to study the effect of time and amounts of humic acid foliar application on wheat yield and yield components in post anthesis heat stress conditions, This experiment was performed as a split factor in the based on a randomized complete block design in three replications during 2017-18 and 2018-19 in Ahvaz city located in south-west of Iran. The main plot was included heat stress (planting date) at two levels includes: optimal planting date (mid-December) and end-of-season stress (mid-February) and humic acid levels at four levels including: water spraying (control), 1, 2 and 3 liters per hectare, the time of application of humic acid on four levels including: tillering, stem trunking, flag leaf emergence and factor pollination as sub-factors. Results indicated that the effect of heat stress after anthesis on grain yield and yeild components was significant. Grain yeild reduction under post anthesis heat stress conoditions was 28% aproximately. The highest grain yield (498.89 g.m-2) and the number of seeds per spike (34.4) were obtained from the optimal planting date and the application of 3 liters per hectare of humic acid in the stem stage. Underlate sowing date. the application of 3 liters per hectare of humic acid in the stem elongation and thesis stages show an increase of 12% copmared to control (without humin) treatment. Higer grain yeild in this treatment was due to higher grain number and wieght. In general, based on the results, the application of three liters per hectare of humic acid in the stem elongation stage in both optimum and late planting date was recomended. |
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| Keywords: Biological yield, humic acid, planting date, wheat |
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Full-Text [PDF 631 kb]
(57 Downloads)
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Type of Study: Research |
Subject:
Crop Physiology
Received: 2020/10/17 | Accepted: 2024/11/30 | Published: 2024/11/30
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