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Influence of Auxin Application and Row Spacing on Growth Performance and Industrial Yield of Soybean

Document Type : Original Article

Authors

Department of Field Crops, College of Agriculture, Tikrit University, Tikrit, Iraq.

Abstract

To investigate the effect of spraying with indole acetic acid and the row spacing, a field experiment was carried out during the summer 2024 at the Field Crops Research Station, Tikrit University. Four concentrations of Indole Acetic acid (IAA) (zero, 150, 300, and 450 ppm) were applied when the plants reached 35 days after planting and four row spacing (30-30, 30-60, 60-60, and 75-75 cm) were used. The experiment was applied according to RCBD design and average were tested according to Duncan test. The results showed that the 300 ppm of IAA increased the branches number per plant (9.02 branches plant-1), the 100 seeds weight (16.04 g), yield (1.50 tons ha-1), and the yield oil (329.59 kg ha-1). The row spacing 75-75 cm recorded the highest averages in the branch number per plant (9.73 branch plant-1), and the 100 seeds weight (16.89 g) while 60-60 cm was the highest in nodes number (11.79 node plant-1). The interaction between IAA and row spacing affected significantly most of soybean traits. The interaction 300×75-75 was significantly higher 100 seeds weight (18.38 g) while the interaction 150×60-60 was significantly higher in nodes number (13.13 nod plant-1), and the interaction 450×30-30 was the highest in the yield oil (416.64 kg ha-1). The result outcomes will be benefitting the industrial and agronomic soybean community.
 

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References
Al-Jubouri, A. A. H. (2024). Role of plant density on vegetative growth and yield of four faba bean cultivars. Journal La Lifesci, 5(3), 218–224.
Amoanimaa-Dede, H., Su, C., Yeboah, A., Zhou, H., Zheng, D., & Zhu, H. (2022). Growth regulators promote soybean productivity: A review. PeerJ, 10, e12556. https://doi.org/10.7717/peerj.12556
Basso, C. J. E., Pertile, W. B., Sangiovo, M. J. R., de Souza, F. M., & da Silva, D. R. O. (2021). Impact of row spacing on soybean morphological parameters and yield. African Journal of Agricultural Research, 17(7), 998–1002.
Bortoli, L. F., Arismendi, G. D. A., Ferreira, M. M., & Martin, T. N. (2021). Sowing speed can affect distribution and yield of soybean. Australian Journal of Crop Science, 15(1), 16–22.
Chețan, F., Chețan, C., Bogdan, I., Pop, A. I., Moraru, P. I., & Rusu, T. (2021). The effects of management (tillage, fertilization, plant density) on soybean yield and quality in a three-year experiment under Transylvanian Plain climate conditions. Land, 10(2), 200. https://doi.org/10.3390/land10020200
Chavhan, D. D., Navlakhe, S. M., Khawale, V. S., Dangore, S. T., & Kothikar, R. B. (2024). Effect of methods of sowing and spacing on growth and yield of soybean (Glycine max L.). International Journal of Advanced Biochemistry Research, 8(7), 10–15.
Davies, P. J. (2010). The plant hormones: Their nature, occurrence, and functions. In P. J. Davies (Ed.), Plant hormones (pp. 1–15). Dordrecht: Springer. https://doi.org/10.1007/978-90-481-2911-8_1
Grossmann, S. (2010). Auxin herbicides: Current status of mechanism and mode of action. Pest Management Science, 66(2), 113–120. https://doi.org/10.1002/ps.1860
Jańczak-Pieniążek, M., Buczek, J., Bobrecka-Jamro, D., Szpunar-Krok, E., Tobiasz-Salach, R., & Jarecki, W. (2021). Morphophysiology, productivity and quality of soybean (Glycine max (L.) Merr.) cv. Merlin in response to row spacing and seeding systems. Agronomy, 11(2), 403. https://doi.org/10.3390/agronomy11020403
Jarecki, W., & Bobrecka-Jamro, D. (2021). Effect of sowing date on the yield and seed quality of soybean (Glycine max (L.) Merr.). Journal of Elementology, 26(1), 1–10. https://doi.org/10.5601/jelem.2020.25.2.2101
Khan, M. A., Sahile, A. A., Jan, R., Asaf, S., Hamayun, M., Imran, M., & Lee, I. J. (2021). Halotolerant bacteria mitigate the effects of salinity stress on soybean growth by regulating secondary metabolites and molecular responses. BMC Plant Biology, 21(1), 1–15. https://doi.org/10.1186/s12870-021-02857-4
Kikon, N., Longkumer, L. T., Amlari, I., Tzudir, L., Nongmaithem, D., Yadav, R., & Rathod, S. (2024). Effect of IAA, GA₃, salicylic acid and tebuconazole on growth, productivity and economics of linseed (Linum usitatissimum L.) cultivation under rainfed conditions. Indian Journal of Agricultural Research, 1–7. https://doi.org/10.18805/IJARe.A-6289
Kumar, M. R., Abhishek, K., Prasad, V. B., & Kathiresan, S. (2021). IAA combined with kinetin elevates the α-linolenic acid in callus tissues of soybean by stimulating the expression of the FAD3 gene. Plant Gene, 28, 100336. https://doi.org/10.1016/j.plgene.2021.100336
Mirriam, A., Mugwe, J., Raza, M. F., Seleiman, M. A., Maitra, S., & Gitari, H. I. (2022). Aggrandizing soybean yield, phosphorus use efficiency and economic returns under phosphatic fertilizer application and inoculation with Bradyrhizobium. Soil Science and Plant Nutrition, 22, 5086–5098. https://doi.org/10.1007/s42729-022-00985-8
Nader, A. A., Hauka, F. I., Afify, A. H., & El-Sawah, A. M. (2024). Drought-tolerant bacteria and arbuscular mycorrhizal fungi mitigate the detrimental effects of drought stress induced by withholding irrigation at critical growth stages of soybean (Glycine max L.). Microorganisms, 12(6), 1123. https://doi.org/10.3390/microorganisms12061123
Nahid, R. A., Das, B., Parvez, M. N., Akter, T., & Uddain, J. (2024). Influence of auxin on flowering, fruit set and yield performance of yard long bean (Vigna unguiculata var. sesquipedalis). Asian Journal of Advances in Agricultural Research, 24(8), 36–45. https://doi.org/10.9734/ajaar/2024/v24i8535
Negi, P., Ambhore, A. M., Bobate, S. P., & Tripathi, B. R. B. D. (2023). Response of plant growth regulators on growth characters and yield of chickpea (Cicer arietinum L.). The Pharma Innovation Journal, 12(7), 1767–1773.
Nourin, Y., Hoque, M. A., Islam, M. M., Labib, L. A., & Dey, S. (2024). Foliar application of IAA and GA₃ on growth and yield attributes of mungbean (Vigna radiata (L.) R. Wilczek). Bangladesh Journal of Botany, 53(3), 459–464.
Rademacher, W. (2015). Plant growth regulators: Backgrounds and uses in plant production. Journal of Plant Growth Regulation, 34(4), 845–872. https://doi.org/10.1007/s00344-015-9541-6
Ribeiro, A. B. M., Bruzi, A. T., Zuffo, A. M., Zambiazzi, E. V., Soares, I. O., Vilela, N. J. D., Pereira, J. L. de A. R., & Moreira, S. G. (2017). Productive performance of soybean cultivars grown in different plant densities. Ciência Rural, 47(1), e20160181. https://doi.org/10.1590/0103-8478cr20160181
Rozov, S., Zagorskaya, A., Deineko, E., & Shamny, V. (2013). Auxin: Regulation and its modulation pathways. Uspekhi Sovremennoi Biologii, 133(2), 115–123.
Sodangi, I. A. (2024). Effect of intra-row spacing on the yield components and yield of soybean in Kafanchan, Kaduna State, Nigeria. Science World Journal, 19(3), 684–686.
USDA. (2024). Foreign Agricultural Service, U.S. Department of Agriculture. https://fas.usda.gov/data/production/commodity/2222000
Vahedi, A. (2011). The effects of micronutrient application on soybean seed yield and seed oil and protein content. Journal of American Science, 7(6), 44–49.
Wang, C., Huang, S., Yu, B., Shan, F., Lyu, X., Yan, C., & Jiang, B. (2025). Hormone regulation effect of blue light on soybean stem internode growth based on the grey correlation analysis model. International Journal of Molecular Sciences, 26(9), 4411. https://doi.org/10.3390/ijms26094411
Zhao, Y. (2010). Auxin biosynthesis and its role in plant development. Annual Review of Plant Biology, 61, 49–64. https://doi.org/10.1146/annurev-arplant-042809-112308
 
Journal of Medicinal and Industrial Plant Sciences
Volume 3, Issue 3
September 2025
Pages 63-74
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