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| Web URL(s): | https://www.crops.org/publications/cs/pdfs/38/6/CS0380061633
Last checked: 08/05/2010
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| Publication Type:
| Refereed |
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| Author(s): | Bowman, D. C.;
Devitt, D. A.;
Engelke, M. C.;
Rufty, T. W. Jr. |
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| Author Affiliation: | Bowman & Rufty: Department of Crop Science, North Carolina State University, Raleigh, NC 27695; Devitt: Department of Environmental and Resource Science, University of Nevada, Reno, NV 89512; and Engelke, Texas A&M University Research and Extension Center, 17360 Coit Road, Dalas, TX 75252 |
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| Title: | Root architecture affects nitrate leaching from bentgrass turf |
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| Section: | Turfgrass science
Other records with the "Turfgrass science" Section
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| Source: | Crop Science. Vol. 38, No. 6, November/December 1998, p. 1633-1639. |
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| Publishing Information: | Madison, WI: Crop Science Society of America |
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| # of Pages: | 7 |
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| Keywords: | TIC Keywords: Agrostis stolonifera; Root depth; Nitrogen uptake; Leaching; Irrigation scheduling; Nitrates
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| Abstract/Contents: | "Understanding the determinants of nitrate leaching should improve nitrogen uptake efficiency and reduce ground water contamination. This column lysimeter study examined the effect of root architecture on NO₃ leaching from two genotypes of creeping bentgrass (Agrostis palustris Huds.) differing in rooting characteristics. Ammonium nitrate was applied (50 kg N ha⁻¹) and the columns were irrigated with 1, 2 or 3 cm day⁻¹ (Exp. 1) or irrigation was delayed 1, 3 or 5 d (Exp. 2). In Exp. 1, leachate NO₃ concentrations and total N leached from the shallow-rooted (SR) genotype were approximately twice those from the deep-rooted (DR) genotype. An average of 38 and 18% of the applied N leached from the SR and DR genotypes, respectively. Cumulative leaching losses increased with irrigation depth. In Exp. 2, NO₃ leaching was reduced 90% or more by increasing the time period for immobilization from 1 to 5 d. Recovery of applied ¹⁵N in the tissue averaged 87% after 2 mo. Absorption of NO₃ and NH₄ was measured in nutrient solution culture. The SR genotype had significantly higher uptake rates than DR for both forms of N, expressed on a root weight basis. Collectively these data indicate that a deep-rooted turfgrass absorbs N more efficiently than a shallow-rooted turf, reducing the concentration and total amount of NO₃ leached. The effect is apparently not due to differences in N uptake, but rather to rooting patterns. Environmental conditions and management practices that affect rooting depth and density may thus affect N nutrition and NO₃ leaching." |
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| Language: | English |
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| References: | 25 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Bowman, D. C., D. A. Devitt, M. C. Engelke, and T. W. Jr. Rufty. 1998. Root architecture affects nitrate leaching from bentgrass turf. Crop Sci. 38(6):p. 1633-1639. |
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| Web URL(s):
https://www.crops.org/publications/cs/pdfs/38/6/CS0380061633
Last checked: 08/05/2010
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: SB 183 .C7 |
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