Document Type : Research Paper

Authors

1 M. Sc. Student of Agroecology, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran

2 Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran

3 Associate Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran

4 Ph.D. Student of Agronomy, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Iran

Abstract

Abstract
 
Background and Objectives
The cropping pattern will influence the crop yield due to better use of light, better crop arrangement within and between rows, and also higher access to soil nutrients (Weiss, 2000). In sesame, high water use efficiency was gained when it was planted over and even under rows rather than when it was planted as a flat form (Aggarwal, 2003). Also, biofertilizers could compensate some of the plant’s need for nutrients like nitrogen, but apparently, it’s not sufficient. So the integrated chemical and biological fertilizer will increase plant height, pod per plant, 1000 seed weight, and grain yield (Kumar et al., 2009). Therefore, the goal of this research is the evaluation of the effect of PGPR as an integrated fertilizer management and planting method on sesame yield quantity and quality.
 
Materials and Methods
This study was carried out at the summer of 2016 in the experimental field station of Agricultural Faculty of Shahid Chamran University of Ahvaz. The experimental design was a split plot based on RCB with three replications. Three planting methods placed on the main plot and sub-plot, including four fertilizer management. Sesame grain yield and yield components were measured. The data were subjected to ANOVA with SPSS and Duncan test was used to distinguish the mean differences which were significant.
 
Results
Results showed that the maximum pod per plant (177 cm), biological yield (5110 kg ha-1), grain yield (1825 kg ha-1), and harvest index (35.7 %) were obtained from the alternative planting on the top row with full chemical fertilizer management. Chlorophyll index was significantly affected by the fertilizer methods. While comparing the chlorophyll index between chemical (56) and the integrated 1and 2 (44 and 48) fertilizer management, it became evident that the decline of chemical nitrogen caused a significant reduction in this index. In other words, applying a biological fertilizer or the activity of PGPRs can’t compensate for the effect of chemical N reduction. In following, reducing the chlorophyll content likely had a negative effect on the plant photosynthesis potential which caused lower 1000 grain weight in integrated treatments than the full chemical fertilizer method. In addition, the planting method had no significant effect on oil percentage, but the highest and lowest oil yield belonged to the alternative planting on the top row (710 kg ha-1) and planting under row (482 kg ha-1), respectively. Based on our data, the change in panting method had no significant effect on oil percentage, but applying chemical N had significantly increased the oil percentage. Also, planting on top of the row increased both oil percentage and grain yield, which had direct positive effects on oil yield. Both oleic and linoleic acid were increased more by PGPRs than chemical N form, but these unsaturated fatty acids were not significantly affected by the planting method treatment.
 
Discussion
We find that both the highest grain yield (1441 kg ha-1) and oil percentage (52.24%) belonged to the planting a row on top of row treatment. Between the integrated fertilizer management, the heights (1674 kg ha-1) and lowest (1068 kg ha-1) grain yield belonged to the full chemical fertilizer and integrated 1 treatment, respectively. In contrast, both oleic and linoleic acid were the highest at integrated fertilizer management in all planting methods with chemical treatment. We concluded that the present sesame cultivars are more adaptive to high-input systems, so we must be breeding new cultivars which are more suitable for sustainable agriculture.

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Main Subjects

References
Aggarwal, P. and Goswami, B. (2003). Bed planting system for increasing water use efficiency of wheat grown on Inceptisol (Typic Ustochrept). Indian Journal of Agricultural Sciences, 73(8), 422-425.
Ahmadi, M. and Bohrani, M. J. (2004). Effect of different levels of nitrogen on yield and yield components and seed oil content of sesame cultivars in Bushehr area. Journal of Agricultural Science and Technology, 48(29), 123-131. [In Farsi]
Alizade, M, Balouchi, H. R. and Yadavi, A. R. (2016). Effect of seed priming and irrigation water quality on yield and grain and oil yield components and sesame genotype (Sesamum indicum L.). Plant Productions, 39(2), 115-125. [In Farsi]
Asadi, H. (2007). The effect of cultivation of sesame and bean on growth indices and their components. M.Sc. Thesis, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad. [In Farsi]
Diepenbrock, W. (2000). Yield analysis of winter oilseed rape (Brassica napus): A review. Field Crops Research, 67(1), 35-49.
Garg, B. K., Kathju, S. and Vyas, S. P. (2005). Salinity-fertility interaction on growth. Photosynthesis and nitrate reductase activity in sesame. Indian Journal of Plant Physiology, 10(2), 162-167.
Ghosh, D. C. and Mohiuddin, M. (2000). Response of summer sesame (Sesamum indicum) to biofertilizer and growth regulator. Agricultural Science, 20(2), 90-92.
Herman, M. A. B., Nault, B. A. and Smart, C. D. (2008). Effect of plant growth-promoting rhizobacteria on bell pepper production and green peach aphid infestation in New York. Crop Protection, 27(6), 996-1002.
Kochaki, A. (1993). Physiology of crop plants. Mashad: Mashad University, Publishing House of Ghods Razavi. [In Farsi]
Kohanmo, M. A. and Aghakhani, M. (2014). Effect of chemical and biological fertilizers on yield components and secondary compounds of chamomile (Matricaria chamomilla L.). Plant Productions, 37(2), 99-112. [In Farsi]
Kumar, B., Pandey, P. and Maheshwari, D. K. (2009). Reduction in dose of chemical fertilizers and growth enhancement of sesame (Sesamum indicum L.) with application of rhizospheric competent Pseudomonas aeruginosa LES4. European Journal of Soil Biology, 45(4), 334-340.
Malik, M. A., Farrukh Saleem, M., Cheema, M. A. and Ahmed, S. (2003). Influence of different nitrogen levels on productivity of sesame (Sesamum indicum L.) under varying planting patterns. International Journal of Agriculture and Biology, 5(4), 490-492.
Mensah, J. K., Obadoni, B. O., Eruotor, P. G. and Onome-Irieguna, F. (2006). Simulated flooding and drought effects on germination, growth, and yield parameters of sesame (Sesamum indicum L.). African Journal of Biotechnology, 5(13), 1249-1253.
Nasrullah, H. M., Cheema, M. S. and Akhtar, M. (2009). Efficiency of different dry sowing methods to enhance wheat yield under cotton-wheat cropping system. International Conference on Sustainable Food Grain production-Challenges and Opportunities, University Agriculture Faisalabad, Pakistan. Oct. 26-27.
Saber, Z., Pirdashti, H., Esmaeli, M., Abbasian, A. and Heidarzadeh, A. (2012). Response of wheat growth parameters to co-Inoculation of plant growth promoting rhizobacteria (PGPR) and different levels of inorganic nitrogen and phosphorus. World Applied Sciences Journal, 16(2), 213-219.
Shakeri, E., Modarres-Sanavy, S. A. M., Amini Dehaghi, M., Tabatabaei, S. A. and Moradi-Ghahderijani, M. (2016). Improvement of yield, yield components and oil quality in sesame (Sesamum indicum L.) by N-fixing bacteria fertilizers and urea. Archives of Agronomy and Soil Science, 62(4), 547-560.
Sharma, P. B. (2005). Fertilizer management in sesame (Sesamum indicum L.) based intercropping system in Tawa command area. Journal of Oilseeds Researsh, 22, 63-65.
Turan, M., Gulluce, M., Cakmakci, R., Oztas, T. and Sahin, F. (2010). The effect of PGPR strain on wheat yield and quality parameters. Proceedings of the World Congress of Soil Science: Soil Solutions for a Changing World, Brisbane, Australia.
Uzun, B., Arslan, C. and Furat, S. (2008). Variation in Fatty Acid Compositions, Oil Content and Oil Yield in a Germplasm Collection of Sesame (Sesamum indicum L.). Journal of American Oil Chemistry Society, 85(12), 1135-1142.
Vessey, J. K. (2003). Plant growth promoting rhizobacteria as biofertilizers. Plant and Soil, 255, 571-586.
Weiss, E. A. (2000). Oil seed crops. Oxford: Blackwell ScienceLtd.
Yasari, E. and Patwardhan, M. (2007). Effects of azotobacter and azospirillum inoculants and chemical fertilizers on growth and productivity of canola (Brassica napus L.). Asian Journal of Plant Sciences, 6(1), 77-82.
Yousefpour, Z. and Yiddavi, A. (2014). Effect of nitrogen and phosphorus chemical and biological fertilizers on quantitative and qualitative yield of sunflower. Knowledge of Agriculture and Sustainable Production, 24(1), 95-112. [In Farsi]