Document Type: Original Article

Authors

Department of Agronomy, Faculty of Agriculture, University of Birjand, Birjand, Iran

Abstract

Purpose: The aim of this study was to investigate the effect of fertilizer type and irrigation scheduling on biomass partitioning in saffron. Research Method: The experimental factors were saffron fertilization (no-fertilizer, cow manure and NPK chemical fertilizer) and irrigation regimes (FI=7200 and DI=3600 m3 ha-1) which were tested during 2015-16 growing season, using a factorial layout. Findings: The weights of roots and leaves had an increasing trend up to 72 and 114 days after first autumnal irrigation (DAFAI), respectively, and then were decreased. Corm production started from 51 DAFAI and its maximum was obtained at DI and chemical or organic fertilizer application. In all combined treatments corm production (maximum rate between 114 and 157 DAFAI) was prior to corm filling (started from 135 DAFAI) and both mentioned indices were higher in DI. The weight of replacement corms per clone in plants that were treated by cow manure and received 7200 m3 ha-1 water, was higher (~10%) than all other treatments. Corm growth rate increased from 50 DAFAI and the maximum value (0.32 and 0.34 g day-1 plant-1 in 56 and 78 DAFAI, respectively) obtained at combined treatment of FI × cow manure. Research limitations: Access to similar scientific references on the topic of research was a limitation. Originality/value: This study was the first research which specifically deals with the allocation of photo-assimilates in saffron and based on its findings, application of 3600 m3 ha-1 water plus cow manure is an appropriate strategy in saffron cultivation during first growing season.

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