Fertilizer nitrogen budgets of two doses of Na15NO3 dressings split-applied to winter wheat in microplots on a loam soil

In a field experiment performed in microplots, winter wheat was fertilized at two different total N dressings (135 and 180 kg ha⁻¹) split-applied as Na¹⁵NO₃ in three equal applications at tillering, stem elongation, and flag leaf. No significant differences were found in the percentage recovery valu...

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Bibliographic Details
Published in:Plant and soil 1989-07, Vol.117 (2), p.177-183
Main Authors: Destain, J.P. (Station de Chimie et de Physique Agricoles , Gembloux (Belgium)), Guiot, J, Francois, E, Riga, A
Format: Article
Language:English
Subjects:
ABONADO DE FRACCIONAMIENTO
Agricultural site preparation
Agronomy. Soil science and plant productions
APPORT FRACTIONNE
Biological and medical sciences
CULTIVOS DE INVIERNO
CULTURE D'HIVER
Fertilizers
Flag leaf
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
LOAM SOILS
NITRATE DE SOUDE
NITRATO DE SODIO
Nitrogen
Nitrogen fertilization
Nitrogen, phosphorus, potassium fertilizations
Plants
SODIUM NITRATE
Soil-plant relationships. Soil fertility. Fertilization. Amendments
SOL SABLOLIMONEUX
SPLIT DRESSINGS
Split fertilizer application
Stem elongation
SUELO FRANCO
Tillering
TRITICUM
Wheat
WINTER CROPS
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Summary:In a field experiment performed in microplots, winter wheat was fertilized at two different total N dressings (135 and 180 kg ha⁻¹) split-applied as Na¹⁵NO₃ in three equal applications at tillering, stem elongation, and flag leaf. No significant differences were found in the percentage recovery values for the entire plant at the three split applications between the two N dressings. The total percentage recovery of fertilizer N by the plant was high and practically equal at both fertilization levels (76.65% and 75.84% for 135 and 180 kg N ha⁻¹, respectively); crop yields were also similar. In contrast, gaseous losses calculated after drawing up the balance sheet were, in absolute values, higher for the tillering and stem elongation split applications when using the 180 kg N ha⁻¹ dressing (7.67 and 4.84 kg N ha⁻¹, respectively) than for the 135 kg N ha⁻¹ dressing (3.45 and 1.26 kg N ha⁻¹, respectively). They were found to be zero at flag leaf at both fertilization levels. The amount of applied fertilizer N did not influence the amount of N taken up from the soil which was about 143 kg ha⁻¹.
ISSN:0032-079X
1573-5036
DOI:10.1007/BF02220710