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Fertilizer nitrogen budgets of 15N-labelled sugarbeet (Beta vulgaris) tops and Na 15NO3 dressings split-applied to winter wheat (Triticum aestivum) in microplots on a loam soil

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Abstract

The fate of N from sugarbeet (Beta vulgaris L.) tops returned to the soil (50 T ha-1) in autumn 1986 before sowing winter wheat (Triticum aestivum L.), and from NaNO3 split-applied in 3 equal dressings (at tillering, stem elongation and flag leaf stages) was studied using isotopically labelled 15N in open stainless-steel cylinders pressed into the soil.

At harvest, the percentage utilization (PU) of N from sugarbeet was very low (6.66%) and negatively influenced by fertilizer N (5.59%), while that of fertilizer N was rather high (69.64%) and unchanged by addition of tops. Residual N in soil represented 25.9% of the amount applied in tops and ranged from 33% for the tillering application to 21% for the flag leaf application. N losses (mainly denitrification) from sugar beet tops amounted to 67% and were very low for mineral fertilizer (less than 5%).

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References

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Authors and Affiliations

  1. Centre de Recherches Agronomiques de l'État, B-5800, Gembloux, Belgium

    J. P. Destain, E. François & J. Guiot

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  1. J. P. Destain
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  2. E. François
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  3. J. Guiot
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Destain, J.P., François, E. & Guiot, J. Fertilizer nitrogen budgets of 15N-labelled sugarbeet (Beta vulgaris) tops and Na 15NO3 dressings split-applied to winter wheat (Triticum aestivum) in microplots on a loam soil. Plant Soil 124, 257–259 (1990). https://doi.org/10.1007/BF00009269

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  • DOI: https://doi.org/10.1007/BF00009269

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