Source-Sink Relationship in Wheat as Affected by Planting Date
To evaluate effect of photosynthate availability under terminal heat stress on yield and yield components of wheat, this research was conducted in a split plot experiment based on randomized complete block design (RCBD) with three replications at the Research Farm of Islamic Azad University of Ahvaz...
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| Format: | Article |
| Language: | fas |
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Islamic Azad University, Tabriz Branch
2016-10-01
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| Series: | Ikufīziyuluzhī-i Giyāhān-i Zirā̒ī |
| Subjects: | |
| Online Access: | http://jcep.iaut.ac.ir/article_525760_cc1f5f52d1b070541b8008f039df2d76.pdf |
| _version_ | 1818061429095268352 |
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| author | Shorangiz Tavanaee Shahram Lack |
| author_facet | Shorangiz Tavanaee Shahram Lack |
| author_sort | Shorangiz Tavanaee |
| collection | DOAJ |
| description | To evaluate effect of photosynthate availability under terminal heat stress on yield and yield components of wheat, this research was conducted in a split plot experiment based on randomized complete block design (RCBD) with three replications at the Research Farm of Islamic Azad University of Ahvaz in 2015 cropping season. Treatments were defoliation in four levels: removal of two upper leaves, flag leaf removal, complete removal of spikelet at one side of spike and control (non-manipulated) which assigned to main plots and three planting date including (Nov. 21st , Dec. 5st and Dec. 21st ) to subplots. Results showed that defoliation had significant effect on number of grains/spike, 1000 grain weight, grain yield, biological yield and harvest index at one percent probability level. Planting date also affected number of spike/m2, number of grains/spike, 1000 grain weight, grain yield, biological yield, and harvest index significantly at one percent probability level. The interaction effect of defoliation and planting date on the number of grains/spike, 1000 grain weight, grain yield, biological yield and harvest index was also significant. The highest grain yield (5691 kg.ha-1) belonged to the control treatment (no defoliation) at first planting date (Nov. 21st). This was due to the not coinciding filling periods to terminal heat stress of growing season where maximum assimilates were produced. The lowest grain yield (2123 kg.ha-1) belonged to delayed sowing and removal of spikelet at one side of spike. Maturity of plants during 3rd planting date (Dec. 21st) was coincided to heat stress and thus reduced assimilate production. |
| first_indexed | 2024-12-10T13:48:10Z |
| format | Article |
| id | doaj.art-5f08c13d59b54873a447255b72b041e5 |
| institution | Directory Open Access Journal |
| issn | 2538-1822 2476-731X |
| language | fas |
| last_indexed | 2024-12-10T13:48:10Z |
| publishDate | 2016-10-01 |
| publisher | Islamic Azad University, Tabriz Branch |
| record_format | Article |
| series | Ikufīziyuluzhī-i Giyāhān-i Zirā̒ī |
| spelling | doaj.art-5f08c13d59b54873a447255b72b041e52022-12-22T01:46:18ZfasIslamic Azad University, Tabriz BranchIkufīziyuluzhī-i Giyāhān-i Zirā̒ī2538-18222476-731X2016-10-01103(39) پاییز541554525760Source-Sink Relationship in Wheat as Affected by Planting DateShorangiz Tavanaee0Shahram Lack1Department of Agronomy, Khuzestan Science and Research Branch, Islamic Azad University, Ahvaz, IranProfessor, Department of Agronomy, Ahvaz Branch, Islamic Azad University, Ahvaz, IranTo evaluate effect of photosynthate availability under terminal heat stress on yield and yield components of wheat, this research was conducted in a split plot experiment based on randomized complete block design (RCBD) with three replications at the Research Farm of Islamic Azad University of Ahvaz in 2015 cropping season. Treatments were defoliation in four levels: removal of two upper leaves, flag leaf removal, complete removal of spikelet at one side of spike and control (non-manipulated) which assigned to main plots and three planting date including (Nov. 21st , Dec. 5st and Dec. 21st ) to subplots. Results showed that defoliation had significant effect on number of grains/spike, 1000 grain weight, grain yield, biological yield and harvest index at one percent probability level. Planting date also affected number of spike/m2, number of grains/spike, 1000 grain weight, grain yield, biological yield, and harvest index significantly at one percent probability level. The interaction effect of defoliation and planting date on the number of grains/spike, 1000 grain weight, grain yield, biological yield and harvest index was also significant. The highest grain yield (5691 kg.ha-1) belonged to the control treatment (no defoliation) at first planting date (Nov. 21st). This was due to the not coinciding filling periods to terminal heat stress of growing season where maximum assimilates were produced. The lowest grain yield (2123 kg.ha-1) belonged to delayed sowing and removal of spikelet at one side of spike. Maturity of plants during 3rd planting date (Dec. 21st) was coincided to heat stress and thus reduced assimilate production.http://jcep.iaut.ac.ir/article_525760_cc1f5f52d1b070541b8008f039df2d76.pdfSowing dateSource-sink limitationwheat |
| spellingShingle | Shorangiz Tavanaee Shahram Lack Source-Sink Relationship in Wheat as Affected by Planting Date Ikufīziyuluzhī-i Giyāhān-i Zirā̒ī Sowing date Source-sink limitation wheat |
| title | Source-Sink Relationship in Wheat as Affected by Planting Date |
| title_full | Source-Sink Relationship in Wheat as Affected by Planting Date |
| title_fullStr | Source-Sink Relationship in Wheat as Affected by Planting Date |
| title_full_unstemmed | Source-Sink Relationship in Wheat as Affected by Planting Date |
| title_short | Source-Sink Relationship in Wheat as Affected by Planting Date |
| title_sort | source sink relationship in wheat as affected by planting date |
| topic | Sowing date Source-sink limitation wheat |
| url | http://jcep.iaut.ac.ir/article_525760_cc1f5f52d1b070541b8008f039df2d76.pdf |
| work_keys_str_mv | AT shorangiztavanaee sourcesinkrelationshipinwheatasaffectedbyplantingdate AT shahramlack sourcesinkrelationshipinwheatasaffectedbyplantingdate |