INBA   12521
INSTITUTO DE INVESTIGACIONES EN BIOCIENCIAS AGRICOLAS Y AMBIENTALES
Unidad Ejecutora - UE
artículos
Título:
Nitrogen leaching of spring wheat (Triticum aestivum L.) genotypes varying in nitrogen-related traits
Autor/es:
NOULAS C; HERRERA JM; ALEXIOU I; KARYOTIS T; LIEDGENS M; STAMP P; TOULIOS M
Revista:
JOURNAL OF PLANT NUTRITION
Editorial:
TAYLOR & FRANCIS INC
Referencias:
Lugar: Londres; Año: 2014 vol. 37 p. 1012 - 1024
ISSN:
0190-4167
Resumen:
Efficient use of nitrogen (N) by wheat crop and hence prevention of possible contamination
of ground and surface waters by nitrates has aroused environmental concerns. The present study
was conducted in drainage lysimeters for three years (1998?2000) to identify whether spring wheat
genotypes (Triticum aestivum L.) that differ in N-related traits differ in N leaching and to relate
parameters of N use efficiency (NUE) with parameters of N leaching. For this reason two spring
wheat cultivars (?Albis? and ?Toronit?) and an experimental line (?L94491?) were grown under low
(20 kg N ha−1) and ample N supply (270 kg N ha−1). The genotypes varied in parameters of NUE
but not in N leaching. Grain yield of the high-protein line (?L94491?) was, on average, 11% lower
than that of ?Toronit? but among genotypes had significantly higher N in the grain (%), grain N
yield, and N harvest index. Nitrogen lost through leaching was considerably low (0.42?0.52 g m−2)
mainly due to low volume of percolating water or the ability of the genotypes to efficiently exploit soil
mineral N. There were no clear relationships between N-related genotype traits and N leaching, but
across all treatments significantly negative correlations between volume of leachate and the amount
of N in the total biomass and grain N yield existed