Abstract
There are different climate classes in Iran where about 85% of the agricultural lands are located in arid and semi-arid regions. To mitigate or compensate effects of drought stress and increase crop fitting and yield, effects of micronutrient application have been studied by several researchers. Field experiments were conducted during the 2021–2022 and 2022–2023 crop seasons to investigate the effect of micronutrients on quantitative and qualitative characteristics of canola cultivars under late-season drought stress conditions. The experiments were arranged in a factorial split-plot design, with two irrigation treatments – normal irrigation (control) or restricted irrigation at flowering stage – and four foliar applications of Zn and Mn after rosette stage (F1: Water, F2: ZnSO4, F3: MnSO4 and F4: ZnSO4 + MnSO4) as the main factor. Winter canola cultivars, including Okapy, Hyola401 and Hyola308, as sub-factor. The results showed that limited irrigation at flowering reduced seed yield, oil percentage and fatty acids content in different canola cultivars. Most of the canola oil is composed of unsaturated fatty acids, and the occurrence of drought stress at the reproductive stage reduced oil quality. By contrast, the minimum yield loss was obtained from Hylon401 cultivar, an early mature cultivar. Overall, it is recommended Hylon401 cultivar for normal irrigation and Hylon308 cultivar for a drought environment when considered the acceptable seed yield in canola. In general, it is suggested that a suitable performance of canola seeds is achieved by foliar application of manganese and zinc.
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Claims 7
Claim · model-written summary
Restricted irrigation at flowering reduced canola seed yield.
- Taxon
- canola cultivars
.jpg?width=60)
Brassica napus var. napuse0 - Treatment
- limited irrigation at floweringe0
- Outcome
- seed yielde0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“limited irrigation at flowering reduced seed yield, oil percentage and fatty acids content in different canola cultivars”
Claim · model-written summary
Restricted irrigation at flowering reduced canola oil percentage and fatty acid content.
- Taxon
- canola cultivarsBrassica napus var. napuse0
- Treatment
- limited irrigation at floweringe0
- Outcome
- oil percentage and fatty acids contente0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“limited irrigation at flowering reduced seed yield, oil percentage and fatty acids content in different canola cultivars”
Claim · model-written summary
Drought at the reproductive stage reduced canola oil quality.
- Taxon
- CanolaBrassica napus var. napust0
- Treatment
- drought stress at the reproductive stagee0
- Outcome
- oil qualitye0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the occurrence of drought stress at the reproductive stage reduced oil quality”
t0“Canola Cultivars”
Claim · model-written summary
Hylon401 had the minimum yield loss.
Verbatim
e0“the minimum yield loss was obtained from Hylon401 cultivar”
Claim · model-written summary
The authors recommend Hylon401 for normal irrigation.
Verbatim
e0“it is recommended Hylon401 cultivar for normal irrigation”
Claim · model-written summary
The authors recommend Hylon308 for drought environments.
Verbatim
e0“Hylon308 cultivar for a drought environment”
Claim · model-written summary
The authors suggest foliar manganese and zinc for suitable canola seed performance.
- Taxon
- canolaBrassica napus var. napuse0
- Treatment
- foliar application of manganese and zince0
- Outcome
- suitable performance of canola seedse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“a suitable performance of canola seeds is achieved by foliar application of manganese and zinc”
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