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| Web URL(s): | https://scisoc.confex.com/scisoc/2015am/webprogram/Paper93664.html
Last checked: 12/19/2016 |
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| Publication Type:
| Report |
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| Content Type: | Abstract or Summary only |
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| Author(s): | Russell, Kerri;
Hopkins, Bryan G.;
Hansen, Neil |
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| Author Affiliation: | Russell: PWS, Brigham Young University Environmental Science Club, Bountiful, UT; Hopkins and Hansen: Brigham Young University, Provo, UT |
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| Title: | Nitrogen and irrigation water interactions in drought-stressed Kentucky bluegrass |
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| Section: | Students of agronomy, soils and environmental sciences (SASES)
Other records with the "Students of agronomy, soils and environmental sciences (SASES)" Section
Undergraduate research symposium contest - poster
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| Meeting Info.: | Minneapolis, Minnesota: November 15-18, 2015 |
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| Source: | ASA, CSSA and SSSA International Annual Meetings. 2015, p. 93664. |
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| Publishing Information: | [Milwaukee, Wisconsin]: [American Society of Agronomy and the Entomological Society of America] |
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| # of Pages: | 1 |
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| Related Web URL: | https://scisoc.confex.com/scisoc/2015am/webprogram/Handout/Paper93664/Printed%20Poster%20SASES%202015.pdf
Last checked: 01/19/2017
Requires: PDF Reader
Notes: Direct download; Poster presentation |
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| Keywords: | TIC Keywords: Drought stress; Evaluations; Evapotranspiration rate; Irrigation water quality; Nitrogen level; Poa pratensis; Stress response; Urban habitat; Water conservation
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| Abstract/Contents: | "There is increasing pressure in arid regions to conserve water, especially during drought cycles. Turfgrass is the irrigated crop of greatest acreage in the United States and is coming under scrutiny in urban ecosystems. The purpose of this study is to evaluate Kentucky bluegrass (Poa pratensis L.) under various irrigation and nitrogen (N) regimes. A study was conducted in an environmentally controlled growth chamber with established Kentucky bluegrass. The grass was grown in pots with a depth of 11 cm in calcined clay rooting media. The two moisture regimes were 60 or 100% evapotranspiration (ET) daily replacement values with three N regimes of deficient, optimal, and excessive. Average daily ET was 7.1 mm for the fully irrigated treatment, with 4.3 mm for the limited irrigation treatment. The N rates were 48.8, 146.5, and 439.6 kg ha1 [-1] for the deficient, optimum, and excessive treatments, respectively. Nitrogen application was applied in the form of 50% urea and 50% polymer coated urea For the fully irrigated grass, the excessive N resulted in 14% greater water use and the deficient N had 12% less compared to the optimum N. For the drought stressed plants, excessive N resulted in 9.6% greater water use and deficient N 18% less water use. These results indicate that N management influences ET in Kentucky bluegrass. Reducing N can result in water conservation, but the effects on turf health and appearance must be considered. NDVI readings for the fully irrigated turfgrass increased linearly with increasing N rate with values 0.637, 0.694, and 0.725 for deficient, optimum, and excessive N, respectively. The same trend occurred with the drought stressed plants with values of 0.621, 0.662, and 0.698 for deficient, optimum, and excessive N, respectively. The results suggest that water conservation might be achieved by optimizing the interaction of N and water supply. In one case, limiting N may reduce ET of fully irrigated grass. In another case, high N may help maintain green grass when water supply is limited." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only!
"119-3" |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Russell, K., B. G. Hopkins, and N. Hansen. 2015. Nitrogen and irrigation water interactions in drought-stressed Kentucky bluegrass. Agron. Abr. p. 93664. |
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Last checked: 12/19/2016 |
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