Award Date

1-1-1999

Degree Type

Thesis

Degree Name

Master of Science (MS)

Department

Water Resource Management

First Committee Member

Dale Devitt

Number of Pages

109

Abstract

Research was conducted to determine the impact leaching fractions (LF = drainage volume divided by irrigation volume) and irrigation uniformity distributions have on the response of tall fescue to irrigation with saline water. Tall fescue (Festuca arundinacea Schreb. 'Monarch') was grown in 18 plots, each with a centrally located lysimeter that enabled estimates of evapotranspiration and irrigation requirements. Imposed treatments included setting LFs at 0.05, 0.15, or 0.25 and manipulating plot irrigation systems such that Christiansen Uniformity Coefficients (CUC) were set at 0.65, 0.75, or 0.85. Saline irrigation water (2.5 dS m{dollar}\sp{-1}{dollar}) was applied for an 18-month period. Significant LF x CUC interactions were observed for depth-weighted soil salinity, yield, ET, tissue moisture content and canopy temperatures. Results suggest that plant response can be maintained when the LF is lowered, within limits, if the CUC is kept high.

Keywords

Arundinacea; Distributions; Fescue; Fraction; Festuca Arundinacea; Influenced; Irrigation; Leaching; Response; Saline; Tall; Uniformity; Water

Controlled Subject

Botany

File Format

pdf

File Size

3164.16 KB

Degree Grantor

University of Nevada, Las Vegas

Language

English

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