Effect of Deficit Irrigation and Plant Density on Growth and Seed Yield and Some Morphological Traits of Autumn Safflower )Carthamus tinctorius L(

Document Type : Scientific - Research

Authors

• Bibi Elahe Moosavi Far ¹
• Mohammad Ali Behdani ²

¹ Department of Agronomy, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran

² Department of Agronomy and Plant Breeding, Faculty of Agriculture, Birjand University, Birjand, Iran.

10.22067/jag.v10i1.53497

Abstract

Introduction
Vegetable oils such as safflower oil, due to high amounts of unsaturated fatty acids, play an important role in the fat balance of human diet and can reduce blood cholesterol level. Drought as the most important factor controlling the performance of the products, on a variety of factors that affect plant growth and yield (Ghamarnia and Sepehri, 2010). Although safflower is a drought resistant plant, but drought has significant effects on its duration of phenological stages, thus cause a significant reduction in yield, yield components, growth and some morphological traits such as plant height and distance to the first bifurcation branches from soil surface (Khoshnam et al. 2012). When the distance between plants in the row is low, vacancies are not green. Low density, especially in row plant spacing is not desirable. This experiment aims at identifying the critical stages of water and specifies the appropriate number of plants in conditions of stress and lack of tension in the area as well.
Material and Methods
In order to evaluate the effect of deficit irrigation and density on growth, seed yield and some morphological traits of a local variety of autumn safflower, an experiment was conducted with a spilt plot arrangement based on randomized complete block design with four replications at Research farm of Faculty of Agriculture, Birjand University in 2013-2014. Irrigation levels (complete irrigation, irrigation until flowering and irrigation until heading-bud stage) and plant density (20, 30, 40 and 50 plant per square meter) allocated randomly in main plots and subplots, respectively. Phonological aspects (number of days to emergence, stemming, heading bud, 50% flowering and physiological maturity) were recorded. The terms consisted of plant height, distance to the first bifurcation branches from soil surface and number of primary and secondary branches and seed yield. SAS ver. 9.1 statistical software was performed to measure the results of the analysis of variance (ANOVA) and means were compared with LSD test in 5% probability level.
Results Discussion
Results showed a significant reduction in plant growth period, plant height, distance to the first bifurcation branches from soil surface and number of primary and secondary branches in the irrigation until heading-bud treatment. The yield loss in this treatment was caused by early flowering and decrease in flowering period, seed filling period, maturity stage and yield components. It seems that the heading-bud stage is the most critical stage of the crop growing under water deficit conditions. Since all of the measured parameters had a positive correlation with seed yield, so a reduction of seed yield under the "irrigation until heading-bud treatment" is obvious. By increasing the plant density, plant height and distance to the first bifurcation branches from soil surface was increased but number of days until maturity and number of primary and secondary branches was reduced. In addition, the highest seed yield was obtained from full irrigation treatment with density of 40 plants in m2. In all plant densities, lowest seed yield was observed in the "irrigation until heading-bud" treatment. As it seems that this growth stage is the most susceptible stage of the crop to limited water, optimum irrigation in this stage may case a significant increase in seed yield.
Conclusion
According to the results of this experiment in order to achieve the maximum yield of safflower in Birjand region, full irrigation and density of 40 plant.m-2 is suggested. Supplementary irrigation during heading-bud stage is necessary to prevent a sharp drop in seed yield. The density of 40 plant.m-2 of safflower can cover the canopy faster and due to a reduction in soil evaporation, it can postpone the drought stress to the end of the growing season. This density, also with increasing the growing season, increasing the plant height and decreasing the number of low or non-fertile branches, results in better plant growth and thus helps to produce more seeds.


Materials and Methods In order to evaluate the effect of deficit irrigation and density on growth and seed yield and some morphological traits of autumn safflower (Mahali Isfahan, a local variety), an experiment was conducted in a spilt plot arrangement based on randomized complete block design with four replications at Research farm, Faculty of Agriculture, Birjand University in 2013-2014. Irrigation levels (perfect irrigation, irrigation until flowering and irrigation until heading-bud stage) and plant density (20, 30, 40 and 50) allocated in main plots and subplots, respectively. Phonological aspects (number of days to emergence, stemming, heading bud, 50% flowering physiological maturity) were recorded. The terms consisted of plant height, distance to the first bifurcation branches from soil surface and number of primary and secondary branches and seed yield. For statistical analysis, analysis of variance (ANOVA) and LSD test were performed using SAS ver. 9.1 software.

Results Discussion Results showed that a significant reduction in plant growth period, plant height, distance to the first bifurcation branches from soil surface and number of primary and secondary branches observed only in irrigation until heading-bud treatment. This treatment caused yield loss via early flowering decrease in flowering period, seed filling period and maturity stage and components yield. It seems that it is one of the most critical stages of the growing crop under drought conditions. As regards all of the measured parameters had a positive correlation with seed yield, as a result, reduction of seed yield under irrigation until heading bud treatment obviously. When plant density increased, plant height and distance to the first bifurcation branches from soil surface was increased but number of days until maturity and number of primary and secondary branches was reduced. In addition, the highest seed yield obtained in treatment of full irrigation with density of 40 plants in m2. In all densities, lowest seed yield observed in irrigation until heading-bud treatment. It seems that this growth stage is most susceptible stage to limited water and under this conditions with irrigated in this stage we can increase significantly seed yield.

Conclusion According to the results of this experiment in order to achieve maximum yield of safflower in Birjand region, full irrigation and plant density with 40 plant m-2, is suggested. It is necessary to the use of supplemental irrigation during heading bud stage to prevent a sharp drop in seed yield. At the beginning of the growth season, plant density with 40 plant m-2, with a faster cover due to reduce the influence of sunlight on the surface of the soil and reduces evaporation from it. Therefore it delays drought stress at plants this density. Also this density with the advance of the growing season, through increased plant height and decreased number of low or non-fertility branches results in better plant growth and thus helps to produce more seeds.

Keywords: drought stress, plant distance in row, developmental stage, seed yield, oil seed

References

• Sirus Mehr, A.R., Shakiba, M.R., Alyari, H., Tourchi, M., and Dabagh Mohammadi Nasab, A. 2008. Effect of drought stress and density on yield and some morphological characteristics of autumn safflower cultivars. Research in Agronomy and Horticulture.78:80-87. (In Persian with English abstract).
• Khoshnam, A., Haydari Sharifabad, H., Afsharmanesh, G.R. 2012. Effects of terminal water deficit stress and plant density on yield, yield components and some morphological traits of safflower in Jiroft Region, Iran. Plant Ecophysiology, 4: 111-117.
• Ghamarnia, H., and Sepehri, S. 2010. Different irrigation regimes affect water use, yield and other yield components of safflower (Carthamus tinctorius L.) crop in a semi-arid region of Iran. Journal of Food, Agriculture & Environment, 8(2): 590 - 593.

Keywords

• Growth development stage
• Drought stress
• Oil seed
• Plant distance in row
• Seed yield

20.1001.1.20087713.1397.10.1.8.6

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References

Alyari, H., Shekari, F., and Shekari F. 2000. Oil seeds. Agronomy and physiology. Publication of Amidi 182 pp. (In Persian)

Amanullah, R.A., and Khalil, S.K. 2009. Effects of plant density and N on phenology and yield of maize. Journal of Plant Nutrition 32: 246-246.

Aphalo, P.J., Ballare, C.L., and Scopel, A.L. 1999. Plant-plant signalling, the shade avoidance response and competition. Journal of Experimental Botany 50: 1629-1634.

Casal, J.J., Sanchez, R.A., and Botto, J.F. 1998. Modes of action of phytochromes. Journal of Experimental Botany 49: 127-138.

Edwards, J.T., Purcell, L.C., and Vories, E.D. 2005. Light interception and yield of short-season maize (Zea mays L.) hybrids in the Midsouth. Agronomy Journal 97: 225-234.

Ehsanzade, P. 2003. Effect of density plant on yield and components yield and some growth traits of two safflower cultivar under Isfahan conditions. Sciences and Technology of Agronomy and Natural Resources 7(1): 129-140. (In Persian with English Summary)

Garcia del Moral, L.F., Rharrabti, Y., Villegas, D., and Royo, C. 2003. Evaluation of grain yield and its components in durum wheat under Mediterranean conditions: An antigenic approach. Agronomy Journal 95: 266-274.

Ghamarnia, H., and Sepehri, S. 2010. Different irrigation regimes affect water use, yield and other yield components of safflower (Carthamus tinctorius L.) crop in a semi-arid region of Iran. Journal of Food, Agriculture & Environment 8(2): 590-593.

Gozubenli, H., Sener, O., Konuskan, O., and Kilinc, M. 2003. Effect of hybrid and plant density on grain yield and yield components of maize (Zea mays L.). Indian Journal of Agronomy 48: 203-205.

Hornok, L. 1986. Effect of environmental factors on growth, yield and on active principles of some spice plants. Acta Horticulture 168: 169-176.

Jabbari Orange, M., and Ebadi, A. 2012. Responses of phenological and physiological stages of spring safflower to complementary irrigation. African Journal of Biotechnology 11(10): 2465-2471.

Kafi, M., Kamkar, B., and Mahdavi damghani, A.M. 2003. Reactions of Agronomic Crops to Growth Environment. Publication of Ferdowsi University, Mashhad, Iran 297 pp. (In Persian)

Kafi, M., and Rostami, M. 2008. Effect of drought stress in reproductive growth stage on yield and components yield and oil content three safflower cultivars in irrigation with salty water conditions. Iranian Agronomy Research 5(1): 121-131. (In Persian with English Summary)

Kahjehpoor, M.R. 2004. Industrial Plants. Jahadeh Daneshgahi Publisher, Isfahan Industrial University, Isfahan, Iran 564 pp. (In Persian)

Khoshnam, A., Haydari Sharifabad, H., and Afsharmanesh, G.R. 2012. Effects of terminal water deficit stress and plant density on yield, yield components and some morphological traits of safflower in Jiroft Region, Iran. Plant Ecophysiology 4: 111-117.

Koutroubas, S.D., Papakosta, D.K., and Doitsinis, A. 2004. Cultivar and seasonal effects on the contribution of pre-anthesis assimilates to safflower yield. Field Crops Research 90: 263-274.

Lee, S.H., Tewari, R.K., Hahn, E., and Paek, K.Y. 2007. Photon flux density and light quality induce changes in growth, stomatal development, photosynthesis and transpiration of Withania somnifera (L.) Dunal. plantlets. Plant Cell, Tissue and Organ Culture 90: 141-151.

Lloveras, J., Manent, J., Viudas, J., Lopez, A., and Santiveri, P. 2004. Seeding rate influence on yield and yield components of irrigated winter wheat in a Mediterranean climate. Agronomy Journal 96: 1258-1265.

Mousavifar, B.E., Behdani, M.A., Jami Alahmadi, M., and Hosaini Bojd, M.S. 2010. Effect of deficit irrigation on growth and yield of spring safflowers) Carthamus tinctorius L(. genotypes under Birjand conditions. Journal of Agroecology 2(4): 627-639. (In Persian with English Summary)

Mousavifar, B.E. 2010. Response of spring safflower genotypes to irrigation disruption in reproductive growth different stages. Master thesis of Agronomy, College of Agriculture, Birjand University, Birjand, Iran. (In Persian with English Summary)

Noruzi, M., and Kazemaini, S.A. 2011. Effect of deficit irrigation and plant density on growth and seed yield of safflower. Iranian Agronomy Research. 10(4): 781-788. (In Persian with English Summary)

Oad, M.A., and Samo, S.M. 2002. Inter and intra row spacing effect on the growth seed yield and oil content of safflower, Asian Journal of Plant Sciences 1: 18-19.

Omidi, A.H., and Sharifmogadas, M.R. 2010. Evaluation of Iranian safflower cultivars reaction to different sowing dates and plant densities. World Applied Sciences Journal 8(8): 953-958.

Pirzad, A. 2007. Effects of irrigation and plant density on some of physiological traits and active ingredients of german chamomile. PhD thesis, College of Agriculture, Tabriz University, Tabriz, Iran. (In Persian with English Summary)

Shahri, A., Ganjali, H. R., and Fanayi, H. R. 2013. Effect of drought stress on quantitative and qualitative yield of safflower (Goldasht cultivar) in different planting densities. International Journal Agriculture Crop Sciences 6(19): 1342-1346.

Shams, K., Pazaki, A.R., and Kobraei, S. 2007. Assessment of effect of planting date and density on yield and components yield of autumn safflower )Carthamus tinctorius L(. under Kermanshah condition. Iranian Journal of agronomy and Plant Breeding 4(2): 23-35. (In Persian with English Summary)

Sirus Mehr, A.R., Shakiba, M.R., Alyari, H., Tourchi, M., and Dabagh Mohammadi Nasab, A. 2008. Effect of drought stress and density on yield and some morphological characteristics of autumn safflower cultivars. Research in Agronomy and Horticulture 78: 80-87. (In Persian with English Summary)

Tahmasebpour, B., Aharizad, S., Shakiba, M., and Babazade Bedostani, A. 2011. Safflower genotypes’ responses to water deficit. International Journal of Agriculture Science 1(2): 579-601.

Yordanov, I., Velikova, V., and Tsonev, T. 2003. Plant response to drought and stress tolerance. Bulgarian Journal of Plant Physiology, Special Issue p. 187-206.