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| Publication Type:
| Refereed |
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| Author(s): | Estavillo, J. M.;
Rodriguez, M.;
Lacuesta, M.;
Gonzalez-Murua, C. |
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| Author Affiliation: | Departamento de Biologia Vegetal y Ecologia, Universidad del Pais Vasco, Apdo. 644, 48080 Bilbao, Spain; Servicia de Investigacion y Mejora Agraria, Departamento de Agricultura y Pesca, Gobierna Vasco, 48016 Derio (Bizkaua), Spain; Departamento de Biologia Vegetal y Ecologia, Universidad del Pais Vasco, Apdo. 450, 01080 Vitoria, Spain |
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| Title: | Effects of cattle clurry and mineral N fertilizer applications on various components of the nitrogen balance of mown grassland |
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| Source: | Plant and Soil. Vol. 188, No. 1, January 1997, p. 49-58. |
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| Publishing Information: | Dordrecht, Netherlands: Kluwer Academic Publishers |
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| # of Pages: | 10 |
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| Related Web URL: | http://link.springer.com/article/10.1023/A%3A1004248228162
Last checked: 10/14/2015
Notes: Abstract only |
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| Keywords: | TIC Keywords: Nitrogen; Efficiency; Soil types; Loam soils; Ammonium nitrate; Calcium; Denitrification; Biomass
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| Abstract/Contents: | "It is essential to establish more accurate N balances for different soil-plant systems in order to improve N use efficiency. In this study the N balance was studied in a poorly drained clayey loam soil under natural grassland supplied with either calcium ammonium nitrate or cattle slurry at two application rates. The aim was to determine the efficiency of the N applied and the factors which affect this efficiency. Mineralization-immobilization of N was calculated by balance between the quantified inputs and outputs of N. As N inputs increased, output via herbage yield was accompanied by an increase in apparent immobilization of N in the soil and by larger losses of N by denitrification. The difference between cattle slurry and N fertilizer was that the slurry behaved as a slow release fertilizer, its supply of mineral N being greater in the periods of time when fertilizer was applied a long time ago. Denitrification losses (up to 17% of the N applied) are suggested to be the main factor to mitigate in order to increase N use efficiency. A decrease in net mineralization (up to 136 kg N ha⁻¹ year⁻¹) was observed which was related to the mineral N application rate. There was evidence to suggest that this decrease was due both to the immobilization of the N applied and to a decrease in the rate of gross mineralization when mineral N was applied. Microbial biomass determinations could not explain the changes in the mineralization-immobilization equilibrium of N because of the great coefficients of variation for thie determination (mean value of 18%). Nevertheless, it contributed to verify and explain some of the changes observed in this equilibrium." |
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| Language: | English |
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| References: | 37 |
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| Note: | Tables |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Estavillo, J. M., M. Rodriguez, M. Lacuesta, and C. Gonzalez-Murua. 1997. Effects of cattle clurry and mineral N fertilizer applications on various components of the nitrogen balance of mown grassland. Plant Soil. 188(1):p. 49-58. |
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