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Estimation of Water Stress on Rice Crop Using Ecological Parameters

Author

Listed:
  • Muhammad Saifullah

    (Remote Sensing group, Department of Space Science, University of the Punjab, Quaid-e-Azam Campus, Lahore, Punjab, Pakistan.)

  • Bilal Islam

    (Department of Physics, University of the Punjab Lahore..)

Abstract

About half of world’s population intake rice as a staple food. As being water baby, rice need surplus of water to get targeted yield. Water scarcity has become a global issue therefore it has become a need to enhance the rice yield with reduced amount of water. In this research we used ecological parameters e.g., temperature, pressure, actual vapor pressure, sunshine hours and the extraterrestrial radiation to compute net radiations, ground and sensible heat fluxes on daily basis. Net shortwave radiations were observed as 23087 w/m2 in comparison to net longwave radiations which were 4387 w/m2 for the complete Rice Growth Period (RGP). The soil heat flux Go was observed as 3104 w/m2. Go was observed dependent upon the Leaf Area Index (LAI) with inverse relationship between them. Sensible heat flux (H) was measured as 1771 w/m2 throughout the RGP. H was observed dependent upon net radiations with a direct relationship between them. Rn, Go and H were used as input parameters to compute water stress which determines the excess of water in early growth stages of rice crop and water scarcity in the ripening stage. The flow of methodology is easily applicable at domestic level to determine water stress in rice fields.

Suggested Citation

  • Muhammad Saifullah & Bilal Islam, 2019. "Estimation of Water Stress on Rice Crop Using Ecological Parameters," International Journal of Agriculture & Sustainable Development, 50sea, vol. 1(1), pages 17-29, January.
    • Handle: RePEc:abq:ijasd1:v:1:y:2019:i:1:p:17-29
    DOI: 10.33411/IJASD/20190103
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    References listed on IDEAS

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    1. Bouman, B. A.M., 2007. "A conceptual framework for the improvement of crop water productivity at different spatial scales," Agricultural Systems, Elsevier, vol. 93(1-3), pages 43-60, March.
    2. Syed Muhammad Hassan Raza & Syed Amer Mahmood, 2018. "Estimation of Net Rice Production through Improved CASA Model by Addition of Soil Suitability Constant (ħα)," Sustainability, MDPI, vol. 10(6), pages 1-21, May.
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    Cited by:

    1. Awais Karamat & Abdul Rehman, 2019. "Estimation of net rice production for the fiscal year 2019 using historical datasets," International Journal of Agriculture & Sustainable Development, 50sea, vol. 1(2), pages 47-65, March.
    2. Ayesha Behzad & Usman Rafique, 2019. "Estimation of Net Primary Production of Rice Crop using CASA model in Nankana Sahib," International Journal of Agriculture & Sustainable Development, 50sea, vol. 1(1), pages 30-46, February.

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    More about this item

    Keywords

    Net radiations; Soil heat flux; Shortwave radiations; long wave radiations; water stress.;
    All these keywords.

    JEL classification:

    • R00 - Urban, Rural, Regional, Real Estate, and Transportation Economics - - General - - - General
    • Z0 - Other Special Topics - - General

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