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| Web URL(s): | https://dl.sciencesocieties.org/publications/aj/pdfs/71/3/AJ0710030381
Last checked: 12/08/2016
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| Publication Type:
| Refereed |
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| Author(s): | Kissel, D. E.;
Bartek, Larry;
Zatopek, L. J. |
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| Author Affiliation: | Kissel: Professor, Department of Agronomy, Kansas State University, Manhattan, Kansas; Bartek: Technician I; Zatopek: Technical Assistant II, Texas Agricultural Experiment Station, Temple, Texas |
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| Title: | Apparent recovery of fertilizer N by Coastal bermudagrass on a swelling clay soil |
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| Source: | Agronomy Journal. Vol. 71, No. 3, May/June 1979, p. 381-384. |
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| Publishing Information: | Madison, WI: American Society of Agronomy |
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| # of Pages: | 4 |
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| Keywords: | TIC Keywords: Turf recovery; Clay soils; Fertilization program; Leaching; Cynodon dactylon; Nitrogen efficiency; Nitrogen immobilization; Denitrification
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| Abstract/Contents: | "The apparent recovery of N fertilizer by Coastal bermudagrass [Cynodon dactylon (L.)] growing on swelling clay soils has usually been quite low (approximately 40 to 50%), possibly due to biological immobilization of large quantities of applied N fertilizer. The objective of this study was to determine if the net immobilization might be reduced after several years of continued fertilization, thereby improving the recovery of N by Coastal bermudagrass. The 6-year study was set up with variable N rates (NH4NO3 was the N source), some applied only the first 3 years of the study, some applied only the last 3 years and some fertilized throughout the study. Measurements were taken of N removed in forage, soil NO3--N at the 504 kg N/ha rate, and soil organic N at the end of the study. Immobilization (as determined by the increase in soil organic N) accounted for over 50% of the applied N, about equal to the amount of N going into the harvested portion of the grass. Other potential losses of N such as leaching and denitrification were apparently insignificant. There was no indication of inorganic N accumulation in the later years of the study. However, some improvement in N availability was noted in the last three years of the study on those plots receiving fertilizer throughout the 6-year study. The results from this study suggest that immobilization of fertilizer N on Coastal bermudagrass pastures would be a substantial sink for applied N fertilizer for an unknown but large number of years. Continuous generous fertilization programs would result in a gradual buildup of soil organic N with a resulting gradual improvement in N recovery by forage." |
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| Language: | English |
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| References: | 14 |
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| Note: | Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Kissel, D. E., L. Bartek, and L. J. Zatopek. 1979. Apparent recovery of fertilizer N by Coastal bermudagrass on a swelling clay soil. Agron. J. 71(3):p. 381-384. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/aj/pdfs/71/3/AJ0710030381
Last checked: 12/08/2016
Requires: PDF Reader
Access conditions: Item is within a limited-access website |
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MSU catalog number: S 22 .A45 |
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