Effects of Planting Dates, Irrigation Management and Cover Crops on Growth and Yield of Saffron (Crocus sativus L.)

Document Type : Scientific - Research

Authors

1 ferdowsi university of mashhad

2 University of Birjand

Abstract

Introduction
Saffron as a winter active plant with low water requirement is the most strategic medicinal plant in arid and semi-arid parts of Iran. This slow-growing plant has narrow leaves and no aerial stem, hence weeds can be overcome it. Moreover, because of its root and canopy structure an important part of different resources is not used by this low input crop. Therefore, the use of associated crops could be an effective way for increasing resources use efficiencies (Koocheki et al., 2016). Appropriate corm planting date is another important factor that affects saffron growth and yield. Results of some studies show that late spring is the best time for corm planting (Ghasemi-Rooshnavand, 2009; Koocheki et al., 2016). In addition, irrigation management has been evaluated in some studies, but irrigation immediately after corm planting has not been investigated previously. Therefore, the aim of this study was to investigate the effect of irrigation management, planting date and the use of some companion crops on flowering of saffron during two growth cycles.
Materials and methods
This experiment was carried out as a split-split plot experiment based on a Randomized Complete Block Design with three replications at Research Station, Ferdowsi University of Mashhad, Iran in 2009-2011. Experimental factors included: planting date of saffron as main factor (first of June, first of August and first of October, 2009), the irrigation management as sub factor (irrigation and no irrigation after each planting date) and the companion crops as sub-sub factor [Persian clover (Trifolium resupinatum), Bitter vetch (Lathyrus sativus) and control). Corm planting was done in 10×25 cm distances with 12 cm depth. In the second year irrigation was done again in the plots which were irrigated after planting in the first year at the same previous dates. Companion crops were sown after first flower picking (November, 2009), then their residue were returned to the soil in coming spring (May, 2010). Therefore, data were analyzed as split-plot in the first year and split-split-plot in the second year. Data analysis was done using SAS 9.1 and means were compared using Duncan multiple range test in 5% level of probability.
Results and discussion
Results showed that most growth and flowering indices of saffron were significantly affected by experimental factors. Quantitative indices of saffron were decreased considerably by delaying in planting date in both studied years. The highest flower yield was obtained in June planting date (28 and 98 kg.ha-1 in 2009 and 2010, respectively), while the lowest was shown in October planting date (18 and 34 kg.ha-1 in 2009 and 2010, respectively). Enhanced growth and yield of saffron in spring planting date is because of real dormancy stage of corms in this time. All studied indices were superior in no-irrigated treatments after planting in both studied years. The flower yield was 9 and 43 kg.ha-1 in 2009 and 2010 in irrigated treatments, respectively, while these values were 37 and 78 kg.ha-1in 2009 and 2010 in no-irrigation treatment, respectively. It has been reported that irrigation during the creation of the primary leaves in the corm buds is negative, while irrigation after this period and simultaneous with the beginning of primary reproductive organs creation is suitable for saffron flowering. The application of cover crops improved partially the quantitative indices of saffron, particularly in Bitter vetch treatment. In addition, the highest flowering rate and the lowest leaf appearance rate were observed in June planting date, no-irrigation and Bitter vetch cover crop treatment. The positive effects of short-growth cycle companion crops on saffron is related to improvement of soil physical, biological and chemical properties, soil temperature regulation, prevention from nutrient leaching, N-fixation by Fabaceae species and help to weeds control.
Conclusion
In total, saffron corm planting few days after the falling leaves in spring, no-irrigation after corm planting, avoidance from untimely summer irrigation and the use of appropriate winter cover crops are good strategies for saffron production.

Keywords


Amirshekari, H., Sorooshzadeh, A., Modaress-Sanavy, A., and Jalali Javaran, M. 2006. Study of effects of root temperature, corm size, and gibberellins’ on underground organs of Saffron (Crocus sativus L.). Iranian Journal of Biology 19(1): 5-18. )In Persian with English Summary)
Behdani, M.A. 2005. Ecological zoning and monitoring of saffron yield fluctuations in Khorasan. PhD thesis, Faculty of Agriculture, Ferdowsi University of Mashhad, Iran. )In Persian with English Summary)
Benschop, M. 1993. The Physiology of Flower Bulbs. Elsevier, Amsterdam.
Campiglia, E., Mancinelli, R., Radicetti, E., and Caporali, F. 2010. Effect of cover crops and mulches on weed control and nitrogen fertilization in tomato (Lycopersicon esculentum Mill.). Crop Protection 29: 354-363.
Calkins, J.B., and Swanson, B. 1995. Comparison of conventional and alternative narey weed management strategies. Weed Technology 9: 761-767.
Dekker, A.M., Clark, A.J., Meisinger, J.J., Mulford, F.R., and McIntosh, M.S. 1994. Legume cover crop contributions to no tillage corn production. Agronomy Journal 86: 126- 135.
Den-Hollander, N.G., Bastiaans, L., and Krop, M.J. 2007a. Clover as a cover crop for weed suppression in an intercropping design I. Characteristics of several clover species. European Journal of Agronomy 26: 92-103.
Den-Hollander, N.G., Bastiaans, L., and Krop, M.J. 2007b. Clover as a cover crop for weed suppression in an intercropping design II. Competitive ability of several clover species. European Journal of Agronomy 26: 104-112.
Farhoodi, R., Rahnama, A., and Esmaeilzadeh, H. 2003. Saffron place in mixed cultures. In Third National Symposium on Saffron, Mashhad, Iran p. 173-178. (In Persian)
Ghasemi-Rooshnavand, R., Hashemiyeh, M., and Afzalian, M. 2009. Planting, conservation and harvesting stages of saffron. Yazd Agriculture Organization, Iran. Issue 132. p. 33. (In Persian)
Gresta, F., Lombardo, G.M., Siracusa, L., and Ruberto, G. 2008a. Effect of mother corm dimension and sowing time on stigmas yield, daughter corms and qualitative aspects of saffron (Crocus sativus L.) in a Mediterranean environment. Journal of the Science of Food and Agriculture 88: 1144-1150.
Gresta, F., Lombardo, G.M., Siracusa, L., and Ruberto, G. 2008b. Saffron, an alternative crop for sustainable agricultural systems. A review. Agronomy for Sustainable Development 28: 95-112.
Gresta, F., Avola, G., Lombardo, G.M., Siracusa, L., and Ruberto, G. 2009. Analysis of flowering, stigmas yield and qualitative traits of saffron (Crocus sativus L.) as affected by environmental conditions. Scientia Horticulturae 119(3): 320-324.
Hosseinzadeh, H., and Sadeghnia, H.R. 2005. Safranal, a constituent of Crocus sativus (saffron), attenuated cerebral ischemia induced oxidative damage in rat hippocampus. Journal of Pharmacy and Pharmaceutical Sciences 8(3): 394-399.
Juan, J.A.D., Cَrcoles, H.L., M-Munoz, R., and Picornell, M. 2009. Yield and yield components of saffron under different cropping systems. Industrial Crops and Products 30: 212-219.
Khosravi, M. 2005. Intercropping black zira (Bonium persicum) with saffron and annual crops: Agroecological and economic perspectives. PhD thesis, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran. )In Persian with English Summary)
Koocheki, A., Najibnia, S., and Lalehgani, B. 2009. Evaluation of saffron yield (Crocus sativus L.) in intercropping with cereals, pulses and medicinal plants. Iranian Journal of Field Crops Research 7(1): 163-172. )In Persian with English Summary)
Koocheki, A., Rezvani Moghaddam, P., and Fallahi, J. 2010. Effects of planting time and irrigation on quantitative indices of saffron. In: Fifth National Symposium of Red Gold (Saffron), Qayen, Iran, November. )In Persian)
Kumar, R. 2009. Calibration and validation of regression model for non-destructive leaf area estimation of saffron (Crocus sativus L.). Scientia Horticulturae 122: 142-145.
Mahmood, A. 2001. Mix cropping system. Available at web site: http://www.agri systems.org.
Maggi, L., Carmona, M., Zalacain, A.D., Kanakis, C., Anastasaki, E., Tarantilis, P.G., Polissiou, M., and Alonso, G.L. 2010. Changes in saffron volatile profile according to its storage time. Food Research International 43: 1329-1334.
Mohammad-Abadi, A.A., Rezvani Moghaddam, P., and Fallahi, J. 2011. Effects of planting pattern and the first irrigation date on growth and yield of saffron. Journal of Agroecology 3(1): 84-93. )In Persian with English Summary)
Molina, R.V., Valero, M., Navarro, Y., Garcia-Luis, A., and Guardiola, J.L. 2004. The effect of time of corm lifting and duration of incubation at inductive temperature on flowering in the saffron plant (Crocus sativus L.). Scientia Horticulturae 103: 79-91.
Molina, R.V., Valero, M., Navarro, Y., Guardiola, J.L., and Garcίa-Luis, A. 2005. Temperature effects on flower formation in saffron (Crocus sativus L.). Scientia Horticulturae 103: 361-379.
Pullaro, T.C., Marino, P.C., Jackson, D.M., Harrison, H.F., and Keinath, A.P. 2006. Effects of killed cover crop mulch on weeds, weed seeds, and herbivores. Agriculture Ecosystem and Environment 115: 97-104.
Rees, A.R. 1992. Ornamental Bulbs, Corms and Tubers. C.A.B. International, Wallingford, UK.
Ritter, W.F., Scarborough, R.W., and Chirnside, A.E.M. 1991. Nitrate leaching under irrigation on Coastal Plain soil. Journal of Irrigation and Drainage Engineering 117: 490-502.
Sadeghi, B., Negari, K., and Hatami, M. 2003. Effect of planting date on the saffron flowering. In Third National Symposium on Saffron, Mashhad, Iran p. 50-51. (In Persian)
Sadeghi, B., Aghamiri, A., and Negari, K. 2003. Effect of summer irrigation on saffron yield. In Third National Symposium on Saffron, Mashhad, Iran p. 171-172. (In Persian)
Sainju, U.M., Singh, B.P., Whitehead, W.F., and Wang, S. 2006a. Carbon supply and storage in tilled and non-tilled soils as influenced by cover crops and nitrogen fertilization. Journal of Environmental Quality 35: 1507-1517.
Sainju, U.M., Whitehead, W.F., Singh, B.P., and Wang, S. 2006b. Tillage, cover crops, and nitrogen fertilization effects on soil nitrogen and cotton and sorghum yields. European Journal of Agronomy 25: 372-382.
Sainju, U.M., Schomberg, H.H., Singh, B.P., Whitehead, W.F., Tillman, P.G., and Lachnicht-Weyers, S.L. 2007. Cover crop effect on soil carbon fractions under conservation tillage cotton. Soil and Tillage Research 96: 205-218.
Siracusa, L., Gresta, F., Avola, G., Lombardo, G.M., and Ruberto, G. 2010. Influence of corm provenance and environmental condition on yield and apocarotenoid profiles in saffron (Crocus sativus L.). Journal of Food Composition and Analysis 23(5): 394-400.
Stute, J.K., and Posner, J.L. 1995. Legume cover crops as a nitrogen source for corn in an oat-corn rotation. Journal of Production Agriculture 8: 385-390.
Uchino, H., Iwama, K., Jitsuyama, Y., Yudate, T., and Nakamura, S. 2009. Yield losses of soybean and maize by competition with inter seeded cover crops and weeds in organic-based cropping systems. Field Crops Research 113: 342-351.
Vyn, T.J., Janovicek, K.J., Miller, M.H., and Beauchamp, E.G. 1999. Spring soil nitrate accumulation and corn yield response to preceding small grain N fertilization and cover crops. Agronomy Journal 91: 17-24.
Zougagh, M., Rıos, A., and Valcarcel, M. 2006. Determination of total safranal by in situ acid hydrolysis in supercritical fluid media: Application to the quality control of commercial saffron. Analytica Chimica Acta 578: 117-121.
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