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    Assessment of the Crop Water Stress Index and Color Quality of Bur Clover (Medicago polymorpha L.) Under Different Irrigation Regimes

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    Name:
    Bijanzadeh_et_al.,_Revised_Fin ...
    Embargo:
    2020-10-28
    Size:
    1.108Mb
    Format:
    PDF
    Description:
    Final Accepted Manuscript
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    Author
    Bijanzadeh, Ehsan
    Barati, Vahid
    Emam, Yahya
    Pessarakli, Mohammad
    Affiliation
    Univ Arizona, Sch Plant Sci
    Issue Date
    2019-10-28
    Keywords
    Canopy temperature
    color quality
    water stress
    irrigation scheduling
    
    Metadata
    Show full item record
    Publisher
    TAYLOR & FRANCIS INC
    Citation
    Ehsan Bijanzadeh, Vahid Barati, Yahya Emam & Mohammad Pessarakli (2019) Assessment of the Crop Water Stress Index and Color Quality of Bur Clover (Medicago polymorpha L.) Under Different Irrigation Regimes, Communications in Soil Science and Plant Analysis, DOI: 10.1080/00103624.2019.1679166
    Journal
    COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS
    Rights
    © 2019 Taylor & Francis Group, LLC
    Collection Information
    This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
    Abstract
    Relationship between canopy temperature and soil moisture is important for using the potential of canopy temperature as an indicator of crop water stress. A two-year field experiment was carried out during June to September 2016 and 2017 at the Research Station of College of Agriculture, Darab, Shiraz University, Iran, to determine crop water stress index (CWSI) for bur clover. Irrigation regimes including well-watered [Irrigation according to 100% field capacity (FC)], mild water stress (75% FC), severe water stress (50% FC), and most severe water stress (25% FC) were arranged in a randomized complete block design with four replications. In 2016, CWSI values showed an increasing trend from June (0.066 in well-watered) to August (0.821 in most severe water stress) as a result of higher vapor pressure deficit (VPD) and depression in canopy-air temperature differences (Tc-Ta). A similar trend was observed in the second year. In both years, by increase in mean temperature from June to August, Tc-Ta differential increased and the highest monthly average value of CWSI for all treatments was obtained in August. By enhancing water stress, the color grading score decreased sharply (from 6 to 3) and stayed constant (2) for August and September. Also, a negative relationship was observed between CWSI and dry matter production (R-2 = 0.88**) and color quality (R-2 = 0.94**). It was concluded that mild water stress (75% FC) with mean seasonal CWSI being ranged about 0.198 to 0.294, without any loss in visual color quality might be the best irrigation regime for bur clover production.
    Note
    12 month embargo; published online: 28 October 2019
    ISSN
    0010-3624
    DOI
    10.1080/00103624.2019.1679166
    Version
    Final accepted manuscript
    ae974a485f413a2113503eed53cd6c53
    10.1080/00103624.2019.1679166
    Scopus Count
    Collections
    UA Faculty Publications

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