Evaluation of the Extinction Coefficient, Radiation Absorption and Use Efficiency of Saffron (Crocus sativus L.)
Leaf area index, light extinction coefficient and radiation use efficiency are important eco-physiological characteristics for realization of crops growth, development and radiation absorption. In order to determine the leaf area index (LAI), light extinction coefficient (K) and radiation use effici...
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| Format: | Article |
| Language: | fas |
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University of Torbat Heydarieh
2015-10-01
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| Series: | Zirā̒at va Fanāvarī-i Za̒farān |
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| Online Access: | http://saffron.torbath.ac.ir/article_10385_d92920ddfcad7d505ca356e90affe7f3.pdf |
| _version_ | 1819162395870756864 |
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| author | Seyyedeh Maliheh Mirhashemi Mohammad Bannayan Ahmad Nezami Mahdi Nassiri Mahallati |
| author_facet | Seyyedeh Maliheh Mirhashemi Mohammad Bannayan Ahmad Nezami Mahdi Nassiri Mahallati |
| author_sort | Seyyedeh Maliheh Mirhashemi |
| collection | DOAJ |
| description | Leaf area index, light extinction coefficient and radiation use efficiency are important eco-physiological characteristics for realization of crops growth, development and radiation absorption. In order to determine the leaf area index (LAI), light extinction coefficient (K) and radiation use efficiency (RUE) of saffron during the first and second growing seasons, four experiments were started in 2011 and ended in 2014, at the Research Farm of the Agriculture Faculty, the Ferdowsi University of Mashhad, Iran. Saffron corms with weights between 13 to15 g and density of 50 plant.m2 were cultivated in 2011 and 2012. In all experimental years during the growing season, crop sampling was taken for required measurements including the leaf area index and shoot dry weight of saffron once every 14 days. The results showed that by increasing the age of saffron from 1 year to two years, the maximum LAI of saffron increased from 0.33 to 1.81, and light extinction coefficient decreased from 1.20 to 0.54. The increasing trend of LAI was coincident with fraction of absorbed radiation for all four years of the experiment. In the first and the second growing seasons, the amount of fraction of absorbed radiation gradually increased with increasing LAI and at 1083 and 1034 GDD reached its maximum value, respectively. In saffron farms when the plant was one year old and two years old, the mean value of RUE was 0.68 and 1.73 g.MJ-1 PAR, respectively. These results indicate that by increasing the saffron age and LAI, the value of K decreases and consequently radiation absorption and use efficiency will increase. |
| first_indexed | 2024-12-22T17:27:34Z |
| format | Article |
| id | doaj.art-2d62fe97551d4b6990f109e850f48d16 |
| institution | Directory Open Access Journal |
| issn | 2383-1529 2383-2142 |
| language | fas |
| last_indexed | 2024-12-22T17:27:34Z |
| publishDate | 2015-10-01 |
| publisher | University of Torbat Heydarieh |
| record_format | Article |
| series | Zirā̒at va Fanāvarī-i Za̒farān |
| spelling | doaj.art-2d62fe97551d4b6990f109e850f48d162022-12-21T18:18:41ZfasUniversity of Torbat HeydariehZirā̒at va Fanāvarī-i Za̒farān2383-15292383-21422015-10-013320321610.22048/jsat.2015.1038510385Evaluation of the Extinction Coefficient, Radiation Absorption and Use Efficiency of Saffron (Crocus sativus L.)Seyyedeh Maliheh Mirhashemi0Mohammad Bannayan1Ahmad Nezami2Mahdi Nassiri Mahallati3PhD. Student in Crop Ecology, Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran.Associate Professor in Crop Ecology, Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran.Professor in Crop Ecology, Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran.Professor in Crop Ecology, Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran.Leaf area index, light extinction coefficient and radiation use efficiency are important eco-physiological characteristics for realization of crops growth, development and radiation absorption. In order to determine the leaf area index (LAI), light extinction coefficient (K) and radiation use efficiency (RUE) of saffron during the first and second growing seasons, four experiments were started in 2011 and ended in 2014, at the Research Farm of the Agriculture Faculty, the Ferdowsi University of Mashhad, Iran. Saffron corms with weights between 13 to15 g and density of 50 plant.m2 were cultivated in 2011 and 2012. In all experimental years during the growing season, crop sampling was taken for required measurements including the leaf area index and shoot dry weight of saffron once every 14 days. The results showed that by increasing the age of saffron from 1 year to two years, the maximum LAI of saffron increased from 0.33 to 1.81, and light extinction coefficient decreased from 1.20 to 0.54. The increasing trend of LAI was coincident with fraction of absorbed radiation for all four years of the experiment. In the first and the second growing seasons, the amount of fraction of absorbed radiation gradually increased with increasing LAI and at 1083 and 1034 GDD reached its maximum value, respectively. In saffron farms when the plant was one year old and two years old, the mean value of RUE was 0.68 and 1.73 g.MJ-1 PAR, respectively. These results indicate that by increasing the saffron age and LAI, the value of K decreases and consequently radiation absorption and use efficiency will increase.http://saffron.torbath.ac.ir/article_10385_d92920ddfcad7d505ca356e90affe7f3.pdfDry matterLeaf area indexRadiationSaffron age |
| spellingShingle | Seyyedeh Maliheh Mirhashemi Mohammad Bannayan Ahmad Nezami Mahdi Nassiri Mahallati Evaluation of the Extinction Coefficient, Radiation Absorption and Use Efficiency of Saffron (Crocus sativus L.) Zirā̒at va Fanāvarī-i Za̒farān Dry matter Leaf area index Radiation Saffron age |
| title | Evaluation of the Extinction Coefficient, Radiation Absorption and Use Efficiency of Saffron (Crocus sativus L.) |
| title_full | Evaluation of the Extinction Coefficient, Radiation Absorption and Use Efficiency of Saffron (Crocus sativus L.) |
| title_fullStr | Evaluation of the Extinction Coefficient, Radiation Absorption and Use Efficiency of Saffron (Crocus sativus L.) |
| title_full_unstemmed | Evaluation of the Extinction Coefficient, Radiation Absorption and Use Efficiency of Saffron (Crocus sativus L.) |
| title_short | Evaluation of the Extinction Coefficient, Radiation Absorption and Use Efficiency of Saffron (Crocus sativus L.) |
| title_sort | evaluation of the extinction coefficient radiation absorption and use efficiency of saffron crocus sativus l |
| topic | Dry matter Leaf area index Radiation Saffron age |
| url | http://saffron.torbath.ac.ir/article_10385_d92920ddfcad7d505ca356e90affe7f3.pdf |
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