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| Publication Type:
| Report |
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| Author(s): | Madison, J. H. Jr. |
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| Author Affiliation: | University of California |
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| Title: | The effect of the root temperature of turfgrasses on the uptake of nitrogen as urea, ammonium, and nitrate |
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| Section: | Division XI - Turfgrass Management
Other records with the "Division XI - Turfgrass Management" Section
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| Meeting Info.: | Chicago, Illinois: December 5-8, 1960 |
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| Source: | 1960 Agronomy Abstracts. 1960, p. 71. |
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| Publishing Information: | Madison, Wisconsin: American Society of Agronomy including Soil Science Society of America, Crop Science Divisions, Agronomic Education Division |
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| # of Pages: | 1 |
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| Abstract/Contents: | "Nitrogen uptake from nutrient solution has been studied at six solution temperatures (10° to 60° C.) with six varieties of five species of grass and with three nitrogen sources. Nitrogen was supplied as NH4+ ion, NO3- ion and as urea. Nitrate uptake was favored by cooler temperatures (10° -20° C.), and ammonium uptake by intermediate temperatures (20° -30° C.). The disappearance of urea from solution increased with temperature up to 50° C. Urease within the roots reacted with at least part of the urea with the result that nitrogen reappeared in the ambient medium as ammonium. Ammonium appearing in solution plus ammonium uptake failed to account for all of the urea removed from solution. At a temperature of 60° C. the roots were injured and nitrogen uptake was related to the amount of water transpired. Different grasses had different patterns of uptake. Bermudagrass responded through a narrow range of temperatures; 'Alta' tall fescue grass responded through a narrow range of nitrogen values. The Bentgrasses (A. tenuis and A. palustris) had the greatest urease activity of the species studied." |
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| Language: | English |
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| References: | 0 |
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| Note: | This item is an abstract only! |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Madison, J. H. Jr. 1960. The effect of the root temperature of turfgrasses on the uptake of nitrogen as urea, ammonium, and nitrate. Agron. Abr. p. 71. |
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MSU catalog number: S1 .A58 |
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