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Evaluation of yield and identifying potential regions for Saffron (Crocus sativus L.) cultivation in Khorasan Razavi province according to temperature parameters

Document Type : Research Paper

Authors

1 M.Sc. student of Irrigation and Reclamation Engineering, Ferdowsi University of Mashhad.

2 Professor of Water Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran.

3 Associate Professor of Water Engineering, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran.

4 Professor of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad.

Abstract

Saffron is cultivated in most part of Iran, because of low water requirement and well adaptation to diverse environmental condition. In recent years, for many reasons such as low water requirement, saffron cultivation areas has been increased especially in Khorasan Razavi province. Temperature is one of the most important factors in saffron flowering phenomena. The aim of this research was to evaluate the response of saffron to temperature in Khorasan Razavi province counties (Torbat-e-Heydarieh, Gonabad, Nishabour, Sabzevar and Ghoochan). Climatic data (monthly minimum, average, maximum temperatures and diurnal temperature range) and saffron yield data were collected for past 20 years period. The stepwise regression methods were used to remove extra parameters and only keep the most important ones. By using these equations and ArcGIS software zoning, Spline method was find the best for saffron crop zoning. The results of linear regression in Gonabad showed that minimum, maximum and average temperature and also diurnal temperature range in March and April months had the greatest impact on saffron yield. For each of the four indices (the minimum, maximum and average temperature and also diurnal temperature range) the best area for saffron cultivation was the southern part of the province (particularly Gonabad); so by increasing distance from this area to north areas (such as Kashmar, Torbat-e-Heydarieh, Sabzevar, Nishabour, Mashhad and finally Ghoochan) saffron yield reduced by 30 to 50 percent. Therefore, the northern areas of the province had relatively low saffron yield. According to result of this research, saffron yield in Khorasan Razavi province was significantly influenced by temperature parameters. Flowering which basically is the most important stage of plant growth, is directly setting up with temperature.

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References
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Saffron Agronomy and Technology
Volume 3, Issue 1 - Serial Number 1
April 2015
Pages 1-12
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