EFICIENCIA DE USO Y DINAMICA DEL NITRÓGENO EN UNA ROTACION CON Y SIN USO DE RESIDUOS

Zagal, Erick; Rodriguez, Nicasio; Vidal, Iván; Hofmann, Glenn

Abstract

"With the objective of studying N use efficiency and dynamics in a rotation with and without management of residues, a labeled-N (15N) experiment was established, in a volcanic soil (Typic Melanoxerand), under irrigation. 15N-labeled micro-plots were installed on a 4-year rotation. 15N was applied only once, as labeled fertilizer or residue, to later follow its fate in the rotation. Treatments applied were as follows: i) T1, rotation with incorporation of residues and inorganic labeled-N; ii) T2, rotation with incorporation of residues and organic labeled-N; iii) T3, rotation without incorporation of residues and inorganic labeled-N. The DM yields of T1 and T3 after two growing seasons, maize (Zea mays) - wheat (Triticum aestivum) was 32.0 and 30.7 t ha-1, respectively, and no significant differences were observed. In this study, maize residues were not a significant source of N for the next crops in the rotation. Incorporation of residues (additional C input) did not lead to higher N retention in the crop system studied for the period considered."

Más información

Título según SCIELO: EFICIENCIA DE USO Y DINAMICA DEL NITR�GENO EN UNA ROTACION CON Y SIN USO DE RESIDUOS
Título de la Revista: AGRICULTURA TECNICA
Volumen: 63
Número: 3
Editorial: Instituto de Investigaciones Agropecuarias, INIA
Fecha de publicación: 2003
Página de inicio: 298
Página final: 310
Idioma: es
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072003000300009&lng=en&nrm=iso&tlng=en
DOI:

10.4067/S0365-28072003000300009

Notas: SCIELO