Abstract
We studied the effects of 15N-labelled ammonium nitrate and urea on the yield and uptake of labelled and unlabelled N by wheat (Triticum aestivum L., cv. Mexi-Pak-65) in a field experiment. The dry matter and N yields were significantly increased with fertilizer N application compared to those from unfertilized soil. The wheat crop used 33.6–51.5 and 30.5–40.9% of the N from ammonium nitrate and urea, respectively. Splitting the fertilizer N application had a significant effect on the uptake of fertilizer N by the wheat. The fertilizer N uptake showed that ammonium nitrate was a more available source of N for wheat than urea. The effective use of fertilizer N (ratio of fertilizer N in grain to fertilizer N in whole plant) was statistically similar for the two N fertilizers. The application of fertilizer N increased the uptake of unlabelled soil N by wheat, a result attributed to a positive added N interaction, which varied according to the fertilizer N split; six split applications gave the highest added N interaction compared to a single application or two split applications for both fertilizers. Ammonium nitrate gave 90.5, 33.5, and 48.5% more added N interaction than urea with one, two, and six split N applications. A values were not significantly correlated with the added N interaction (r=0.557). The observed added N interaction may have been the result of pool substitution, whereby added labelled fertilizer N replaced unlabelled soil N.
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References
Azam F, Asharaf M, Lodhi A, Sajjad MI (1990) Availability of soil and fertilizer nitrogen to wheat (Triticum aestivum L.). Biol Fert Soils 10:134–138
Azam F, Ashraf M, Lodhi A, Sajjad MI (1992) Fate and interaction with native soil N of ammonium N applied to wetland rice (Oryza sativa L.) grown under saline and non-saline conditions. Biol Fertil Soils 13:102–107
Burns IG (1980) Influence of spatial distribution of nitrate on the uptake of N by plants, review and a model for development of roots. J Soil Sci 31:155–173
Dewis J, Freites F (1970) Physical and chemical methods of soil and water analysis. Soil Bull No 10, FAO-UN, Rome, pp 51–161
Gok M, Ottow JCG (1988) Effect of cellulose and straw incorporation in soil on total denitrification and nitrogen immobilization at initially aerobic and permanent anaerobic conditions. Biol Fertil Soils 5:317–322
Hamid A, Ahmad M (1987) Ammonia volatilization losses from nitrogen fertilizers in alluvial alkaline soils. Pak J Agric Sci 24:129–139
Hart PBS, Rayner JH, Jenkinson DS (1986) Influence of pool substitution on the interpretation of fertilizer experiments with 15N. J Soil Sci 37:389–403
Hassan MA (1972) Detailed soil survey of Punjab Agricultural Research Institute, Lyallpur, Directorate of Soil Survey W Pakistan, pp 47–49
Hauck RD, Bremner JM (1976) Use of tracers for soil nitrogen research. Adv Agron 28:219–266
Jenkinson DS, Fox RH, Rayner JA (1985) Interaction between fertilizer and soil nitrogen: The so-called priming effect. J Soil Sci 36:425–444
Olsen SR, Sommers LE (1982) Phosphorus. In: Page AL, Miller RH, Keeney DR (eds) Methods of soil analysis. II. Chemical and microbiological properties, 2nd edn. Am Soc Agron Mongr 10, Madison, Wis, pp 420–422
Ottow JCG, Fabig W (1985) Influence of oxygen aeration on denitrification and redox level in different bacterial batch cultures. In: Caldwell DE, Brierley JA, Brierley CL (eds) Planetary ecology. Van Nostrand — Reinhold, New York, pp 427–440
Recous S, Machet JM, Mary B (1988) The fate of labelled 15N urea and ammonium nitrate applied to a winter wheat crop. Plant and Soil 112:215–224
Riga A, Fischer V, Van Praag HJ (1980) Fate of fertilizer nitrogen applied to winter wheat as Na 15NO3 and (15NH4)2SO4 studies in microplots through a four course rotation: 1. Influence of fertilizer spliting on soil and fertilizer nitrogen. Soil Sci 130:88–99
Sörenson LH (1982) Mineralization of organically bound nitrogen in soil as influenced by plant growth and fertilization. Plant and Soil 65:51–61
Wickramasinghe KN, Rodgers GA, Jenkinson DS (1985) Transformations of nitrogen fertilizers in soil. Soil Biol Biochem 17:625–630
Woods LE, Cole CV, Porter LK, Coleman DC (1987) Transformation of added and indigenous nitrogen in gnotoblastic soil: A comment on the priming effect. Soil Biol Biochem 19:673–678
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Hamid, A., Ahmad, M. Effects of 15N-labelled ammonium nitrate and urea on soil nitrogen during growth of wheat (Triticum aestivum L.) under field conditions. Biol Fertil Soils 17, 232–236 (1994). https://doi.org/10.1007/BF00336328
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DOI: https://doi.org/10.1007/BF00336328