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Modeling sorghum response to irrigation water salinity at early growth stage

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  • Saadat, Saeed
  • Homaee, Mehdi

Abstract

Agricultural water management in arid and semi-arid regions largely depends on availability and quality of irrigation water at different plant growth stages. In saline environments, plant response to salinity varies at different growth stages. Information on plant response to salinity at various growth stages can be used in managing saline waters for irrigation. This study was conducted to quantitatively assess response of sorghum (Sorghum bicolor L. Moench) to salinity at seedling stage. Consequently, an extensive experiment in natural saline sandy loam soil with five natural saline water treatments including 4, 6, 8, 10, and 12dS/m was conducted. The reason for selecting natural sources of saline water and a saline soil was to minimize deviations from natural conditions under which sorghum grows. Sorghum seeds were planted and seedles counted at 24h time intervals. The macroscopic models of Maas and Hoffman, van Genuchten and Hoffman, Dirksen et al., and Homaee et al. were used to predict relative seedlings at different salinity levels. The obtained results indicated that salinity threshold value EC* for sorghum at seedling stage is 1dS/m and the seedling rate reduces to 50 percent at 11dS/m of soil salinity. All evaluated models overestimated the EC* value. Calculated statistics indicated that the nonlinear salinity models are more accurate than the linear model. Among those, Homaee et al. model provided better predictions at seedling growth stage.

Suggested Citation

  • Saadat, Saeed & Homaee, Mehdi, 2015. "Modeling sorghum response to irrigation water salinity at early growth stage," Agricultural Water Management, Elsevier, vol. 152(C), pages 119-124.
  • Handle: RePEc:eee:agiwat:v:152:y:2015:i:c:p:119-124
    DOI: 10.1016/j.agwat.2015.01.008
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    1. Skaggs, Todd H. & van Genuchten, Martinus Th. & Shouse, Peter J. & Poss, James A., 2006. "Macroscopic approaches to root water uptake as a function of water and salinity stress," Agricultural Water Management, Elsevier, vol. 86(1-2), pages 140-149, November.
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    2. Feghhenabi, Faride & Hadi, Hashem & Khodaverdiloo, Habib & van Genuchten, Martinus Th., 2021. "Borage (Borago officinalis L.) response to salinity at early growth stages as influenced by seed pre-treatment," Agricultural Water Management, Elsevier, vol. 253(C).
    3. Wang, Lichun & Ning, Songrui & Chen, Xiaoli & Li, Youli & Guo, Wenzhong & Ben-Gal, Alon, 2021. "Modeling tomato root water uptake influenced by soil salinity under drip irrigation with an inverse method," Agricultural Water Management, Elsevier, vol. 255(C).
    4. Feghhenabi, Faride & Hadi, Hashem & Khodaverdiloo, Habib & van Genuchten, Martinus Th., 2020. "Seed priming alleviated salinity stress during germination and emergence of wheat (Triticum aestivum L.)," Agricultural Water Management, Elsevier, vol. 231(C).
    5. Nouri, Milad & Homaee, Mehdi & Bannayan, Mohammad & Hoogenboom, Gerrit, 2016. "Towards modeling soil texture-specific sensitivity of wheat yield and water balance to climatic changes," Agricultural Water Management, Elsevier, vol. 177(C), pages 248-263.
    6. José Orlando Nunes da Silva & Luiz Guilherme Medeiros Pessoa & Emanuelle Maria da Silva & Leonardo Raimundo da Silva & Maria Betânia Galvão dos Santos Freire & Eduardo Soares de Souza & Sérgio Luiz Fe, 2023. "Effects of Silicon Alone and Combined with Organic Matter and Trichoderma harzianum on Sorghum Yield, Ions Accumulation and Soil Properties under Saline Irrigation," Agriculture, MDPI, vol. 13(11), pages 1-23, November.
    7. Nouri, Milad & Homaee, Mehdi & Bannayan, Mohammad & Hoogenboom, Gerrit, 2017. "Towards shifting planting date as an adaptation practice for rainfed wheat response to climate change," Agricultural Water Management, Elsevier, vol. 186(C), pages 108-119.
    8. Ritzema, H.P., 2016. "Drain for Gain: Managing salinity in irrigated lands—A review," Agricultural Water Management, Elsevier, vol. 176(C), pages 18-28.

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