Document Type : Research Paper

Authors

1 Ph.D. Candidate, Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

2 Assistant Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

3 Associate Professor, Department of Cultivation and Development of Medicinal Plants Research Center, Institute of Medicinal Plants, ACECR, Karaj, Iran

4 Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

5 Associate Professor, Department of Horticultural Science, Faculty of Agriculture and Natural Resources, University of Tehran, Karaj, Iran

Abstract

The present study has been conducted to investigate the duration of growth period of different cannabis (Cannabis sativa L.) ecotypes and their responses to water stress based on a factorial completely randomized experiment design in the greenhouse condition at the University of Tehran in 2017. Irrigation levels include 50%, 75%, and 100% of field capacity, with the ecotypes being Urmia, Sanandaj, Tabriz, Dasht-e-Moghan, Rasht, Khomein, Daran, Qom, Shahroud, Kerman, Tabas, and Saravan. Results show that Rasht and Khomein ecotypes have had the highest and lowest duration of germination phase and growth degree-days (GDD1), respectively. The highest duration of vegetative, flowering and maturation phases belong to Dasht-e-Moghan, Rasht, and Dasht-e-Moghan ecotypes with 71.33, 30, and 46.66 (days), respectively, at 100% field capacity. The lowest durations of these phases could be seen in Tabas, Tabriz, and Saravan ecotypes with 42, 16, and 17 (days), respectively, at 50% field capacity. Also, the highest values of growth degree-days for vegetative (GDD2), flowering (GDD3), and maturation (GDD4) phases  for Dasht-e-Moghan, Kerman, and Dasht-e-Moghan ecotypes with 1788, 836, and 1169 (0C.d), respectively, at 100% field capacity, with their lowest values belonging to Tabas, Tabri,z and Saravan with 1039, 413, and 448 (0C.d), respectively, at 50% field capacity. Based on growth period duration and cumulative growth degree-days (total GDD), Tabas and Dasht-e-Moghan ecotypes are found as earliest and latest ecotypes, respectively.

Keywords

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