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A field experiment was conducted at the University of Baghdad, Al-Jadriya in the spring season of 2021 for the potato crop under the influence of organic biofertilizers and water stress. Three levels of bio-organic fertilizers were used 0 (OM0), 1 (OM1) and 1.5 (OM2) ton ha-1 and three levels of irrigation 30 (I-30), 50 (I-50) and 75 (I-75) % water depletion were available to evaluate the role of bio-organic fertilizer and water stress in production functions and water use efficiency. I-30 treatment showed the highest water consumption ranging between 468 and 486 mm season-1 and decreased to 355-436 mm with water stress treatments I-75. The values of water consumption varied according to the levels of bio-organic fertilizer. The percentage of decrease in water consumption was 1.49 and 3.66% at low stress and reached 6.37% at high stress (I-75) compared to OM0. Both treatments I-30 and I-50 gave the same yield. Bio-organic fertilization led to an increase in the average yield of tubers 32.8 and 41.9% for both OM1 and OM2 compared to OM0. The production functions indicate that the yield increases by 0.057 ton ha-1 mm-1 of added water, and the water depth must be greater than 64.2 mm to obtain a yield that is 1.96 ton ha-1 more (significant limit) than the treatments in the experiment (1.96=0.057(Irr.). )-1.70). Fertilizer levels are higher than 1.9 ton ha-1 to obtain a higher yield of tubers by 26.29 tons/ha and the efficiency of water use is nil according to the water use function when the water consumption is higher than 692.7 mm. The response factor decreased when adding bio-organic fertilizer compared to OM0, which means that plants were not affected significantly under water stress conditions.


Bio-Fertilizers Drip irrigation Potato yield Production functions Response factor Water consumption

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How to Cite
Masood, T. K. ., Ati , A. S. ., & Hammadi , Q. O. . (2023). Effect of Water Stress and Levels of Bio-Organic Fertilizers on Water Productivity and Potato Solanum tuberosum L. Yield. Basrah Journal of Agricultural Sciences, 36(2), 134–143.


  1. Allen, R. G., Pereira, L. S., Raes, D., & Smith, M. (1998). Crop evapotranspiration: Guidelines for computing crop requirements. FAO Irrig. Drain. paper No. 56. FAO, Rome, 300pp.
  3. Al-Lami A A, Al-Rawi S S, & Ati A. S. (2023). Evaluation of the AquaCrop model performance and the impact of future climate changes on potato production under different soil management systems. Iraqi Journal of Agricultural Sciences, 54, 253- 267.
  5. Ati, A. S., Hassan, A., Abd-Aljabar, S., & Salah, A. (2017). Role of bio fertilization on wheat and water productivity under water scarcity. Pakistan Journal Biotechnology, 14(4), 521-525.
  6. Black, C.A. (1965). Methods of Soil Analysis. Part (1). Physical and mineralogical soil properties. Am. Soc. Agronomy. Inc. Publisher, Madison, Wisconsin, 1572pp:
  7. Chen, M., Zhang, S., Liu, L., Wu, L., & Ding, X. (2021). Combined organic amendments and mineral fertilizer application increase rice yield by improving soil structure, P availability and root growth in saline-alkaline soil. Soil and Tillage Research, 212, 105060
  9. Cui, Q., Xia, J., Yang, H., Liu, J., & Shao, P. (2021). Biochar and effective microorganisms promote Sesbania cannabina growth and soil quality in the coastal saline-alkali soil of the Yellow River Delta, China. Science of the Total Environment, 756, 14380.
  11. Densilin D.M., Srinivasan S., Manju, P., & Sudha S. (2010). Effect of individual and combined application of biofertilizers, inorganic fertilizer and vermicompost on the biochemical constituents of chilli (Ns - 1701). Journal Biofertilezers & Biopesticides, 2, 104.
  13. Lal, R. (2006). Enhancing crop yields in the developing countries through restoration of the soil organic carbon pool in agricultural lands. Land Degradation & Development, 17, 197-207.
  15. Li, R., Tao, R., Ling, N., & Chu, G. (2017). Chemical, organic and bio-fertilizer management practices effect on soil physicochemical property and antagonistic bacteria abundance of a cotton field: implications for soil biological quality. Soil and Tillage Research, 167, 30-38.
  17. Mao, X., Yang, Y., Guan, P., Geng, L., Ma, L., Di, H., & Li, B. (2022). Remediation of organic amendments on soil salinization: Focusing on the relationship between soil salts and microbial communities. Ecotoxicology and Environmental Safety, 239, 113616
  19. Masood, T. K., & Shahadha, S. S. S. (2021). Simulating the effect of climate change on winter wheat production and water /nitrogen use efficiency in Iraq: case study. Iraqi Journal of Agricultural Sciences, 52(4), 999-1007.
  21. Page, A. L., Miller, R. H., & Kenney, D. R. (1982). Methods of Soil Analysis Part 2, 2nd edition Chemical Properties. Agronomy No. 9. Am. Soc. Agron. Madison, Wisconsin.pp: 285-289.
  23. Pereira, A. B., & Schock, C. C. (2006). Development of irrigation best management practices for potato from a research perspective in the United States. e-publish, 1(1), 1-20.
  25. Singh, T. B., Ali, A., Prasad, M., Yadav, A., Shrivastav, P., Goyal, D., & Dantu, P. K. (2020). Role of organic fertilizers in improving soil fertility. Pp, 61-77. In: Naeem, M., Ansari, A., & Gill, S. (Editors). Contaminants in Agriculture, Springer, Cham, 446pp.
  27. Wang, B., Yuan, J., Zhang, J., Shen, Z., Zhang, M., Li, R., & Shen, Q. (2013). Effects of novel bioorganic fertilizer produced by Bacillus amyloliquefaciens W19 on antagonism of Fusarium wilt of banana. Biology and fertility of soils, 49(4), 435-446.
  29. Ye, L., Zhao, X., Bao, E., Li, J., Zou, Z., & Cao, K. (2020). Bio-organic fertilizer with reduced rates of chemical fertilization improves soil fertility and enhances tomato yield and quality. Scientific Reports, 10(1), 1-11.‏
  31. Zhao, J., Ni, T., Li, J., Lu, Q., Fang, Z., Huang, Q., & Shen, Q. (2016). Effects of organic–inorganic compound fertilizer with reduced chemical fertilizer application on crop yields, soil biological activity and bacterial community structure in a rice–wheat cropping system. Applied Soil Ecology, 99, 1-12.‏