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Application of Plant Growth Regulators on Soft White Winter Wheat under Different Nitrogen Fertilizer Scenarios in Irrigated Fields

Author

Listed:
  • Ruijun Qin

    (Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston, OR 97838, USA)

  • Christos Noulas

    (Institute of Industrial and Forage Crops, Hellenic Agricultural Organization-“Demeter”, 41335 Larissa, Greece)

  • Don Wysocki

    (Columbia Basin Agricultural Research Center, Oregon State University, Adams, OR 97810, USA)

  • Xi Liang

    (Aberdeen Research and Extension Center, University of Idaho, Aberdeen, ID 83210, USA)

  • Guojie Wang

    (Eastern Oregon Agriculture and Natural Resources Program, La Grande, OR 97850, USA)

  • Scott Lukas

    (Hermiston Agricultural Research and Extension Center, Oregon State University, Hermiston, OR 97838, USA)

Abstract

Lodging in cereal crops can result in yield loss and harvesting difficulties for growers. Application of plant growth regulator (PGR) has been an indispensable management practice to reduce lodging problems that are often exacerbated during high wind growing conditions and/or high nitrogen (N)/water environments, but the data is limited in the Columbia Basin of Oregon. The objective of this research was to evaluate the effect of two PGR products (chlormequat chloride-CC, trinexapac-ethyl-TE) at different rates and application timings on two soft white winter wheat varieties (ORCH-102 and SY Ovation). Crop growth (stem height and thickness), yield-related (spike density as ears m −2 , seeds per spike, grain weight) and quality parameters (test weight, protein) were measured for two cropping seasons from October 2017 to July 2019 following the application of the two PGR products at tillering (GS21-26), stem elongation (GS30-32), and/or flag leaf (GS37-39) stages under a high-N fertilizer scenario. In both growing seasons, no lodging problems were recorded for any treatments. The plant height was reduced after PGR application, but the impact on stem thickness was limited. PGR application slightly affected wheat yield, yield components, testing weight, and protein level in both growing seasons. Our results suggested that the effect of PGR application is relatively limited if no lodging problem occurred.

Suggested Citation

  • Ruijun Qin & Christos Noulas & Don Wysocki & Xi Liang & Guojie Wang & Scott Lukas, 2020. "Application of Plant Growth Regulators on Soft White Winter Wheat under Different Nitrogen Fertilizer Scenarios in Irrigated Fields," Agriculture, MDPI, vol. 10(7), pages 1-13, July.
    • Handle: RePEc:gam:jagris:v:10:y:2020:i:7:p:305-:d:386851
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    Citations

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    Cited by:

    1. Joanna Lemanowicz & Bożena Dębska & Robert Lamparski & Agata Michalska & Jarosław Pobereżny & Elżbieta Wszelaczyńska & Agata Bartkowiak & Małgorzata Szczepanek & Magdalena Banach-Szott & Tomasz Knapow, 2023. "Influence of Plant Growth Retardants and Nitrogen Doses on the Content of Plant Secondary Metabolites in Wheat, the Presence of Pests, and Soil Quality Parameters," Agriculture, MDPI, vol. 13(6), pages 1-22, May.
    2. Yurii Pleskachiov & Sergey Voronov & Serazhutdin Kurbanov & Francess Sia Saquee & Meisam Zargar, 2022. "Application of New-Generation Growth Regulators and Topdressing Nitrogen Fertilizers Increases Improver Winter Wheat Yield and Grain Quality in South Russia," Agriculture, MDPI, vol. 12(9), pages 1-8, August.

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