Review of cool‐season turfgrass water use and requirements: I. Evapotranspiration and responses to deficit irrigation.

Autor: Braun, Ross C., Bremer, Dale J., Ebdon, Jeffrey Scott, Fry, Jack D., Patton, Aaron J.
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Zdroj: Crop Science; Sep/Oct2022, Vol. 62 Issue 5, p1661-1684, 24p
Abstrakt: Knowledge of water use rates and responses to deficit irrigation practices in cool‐season turfgrasses is important, particularly in climates where irrigation is required to maintain turf quality. This is Part I of two companion papers reviewing cool‐season turfgrass water use and requirements. Part I presents the history of early water conservation and quantification methods in turfgrass and summarizes research on cool‐season turfgrass evapotranspiration (ET) and deficit irrigation. Part II summarizes research on cool‐season turfgrass drought resistance completed since 1980. Summaries of research from > 60 experiments related to ET include: measured ET rates in various climates; comparisons of actual ET to estimated ET; crop coefficients; deficit irrigation; and how plant characteristics and management practices influence ET. Summarized daily evapotranspiration (ETc) rates for Agrostis L. spp., fine fescues (Festuca L. spp.), tall fescue (Festuca arundinacea Schreb.), Lolium spp., and Poa spp. were a weighted average ETc and coefficient of variation (CV) of 6.12 (19.0%), 5.52 (16.8%), 7.79 (14.5%), 5.90 (19.9%), and 5.35 (30.2%) mm d–1, respectively, with an overall ETc of 6.25 mm d–1 (26.9%). Average crop coefficients have ranged from 0.85 to 0.95 (0.91 weighted average across species) and vary slightly during growing months. Minimum deficit irrigation replacement levels for acceptable turf quality have ranged from 59 to 74% of ET under different irrigation intervals. Further study is warranted to investigate differences in crop coefficients among cultivars within species, cultural influences, deficit irrigation replacement levels, and to standardize measurement protocol to improve consistency in crop coefficients across future turfgrass experiments. Core Ideas: A brief history of early water conservation research in turfgrass is presented.Evapotranspiration and deficit irrigation research in cool‐season turfgrasses is summarized.Average cool‐season turfgrass evapotranspiration rates ranged from 5.35 to 7.79 mm d−1.Average cool‐season turfgrass crop coefficient rates ranged from 0.85 to 0.95.Minimum deficit irrigation replacement levels have ranged from 59 to 74% of ET. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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