Determination of the uptake and translocation of nitrogen applied at different growth stages of a melon crop (Cucumis melo L.) using 15N isotope.

Cabello Cabello, María Jesús; Castellanos Serrano, Maria Teresa; Tarquis Alfonso, Ana Maria; Cartagena Causape, Maria Carmen; Arce Martinez, Augusto y Ribas Elcorobarrutia, Francisco (2011). Determination of the uptake and translocation of nitrogen applied at different growth stages of a melon crop (Cucumis melo L.) using 15N isotope.. "Scientia horticulturae", v. 130 (n. 3); pp. 541-550. ISSN 0304-4238. https://doi.org/10.1016/j.scienta.2011.08.003.

Descripción

Título: Determination of the uptake and translocation of nitrogen applied at different growth stages of a melon crop (Cucumis melo L.) using 15N isotope.
Autor/es:
  • Cabello Cabello, María Jesús
  • Castellanos Serrano, Maria Teresa
  • Tarquis Alfonso, Ana Maria
  • Cartagena Causape, Maria Carmen
  • Arce Martinez, Augusto
  • Ribas Elcorobarrutia, Francisco
Tipo de Documento: Artículo
Título de Revista/Publicación: Scientia horticulturae
Fecha: Septiembre 2011
Volumen: 130
Materias:
Escuela: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Departamento: Matemática Aplicada a la Ingeniería Agronómica [hasta 2014]
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

In order to establish a rational nitrogen (N) fertilisation and reduce groundwater contamination, a clearer understanding of the N distribution through the growing season and its dynamics inside the plant is crucial. In two successive years, a melon crop (Cucumis melo L. cv. Sancho) was grown under field conditions to determine the uptake of N fertiliser, applied by means of fertigation at different stages of plant growth, and to follow the translocation of N in the plant using 15N-labelled N. In 2006, two experiments were carried out. In the first experiment, labelled 15N fertiliser was supplied at the female-bloom stage and in the second, at the end of fruit ripening. Labelled 15N fertiliser was made from 15NH415NO3 (10 at.% 15N) and 9.6 kg N ha−1 were applied in each experiment over 6 days (1.6 kg N ha−1 d−1). In 2007, the 15N treatment consisted of applying 20.4 kg N ha−1 as 15NH415NO3 (10 at.% 15N) in the middle of fruit growth, over 6 days (3.4 kg N ha−1 d−1). In addition, 93 and 95 kg N ha−1 were supplied daily by fertigation as ammonium nitrate in 2006 and 2007, respectively. The results obtained in 2006 suggest that the uptake of N derived from labelled fertiliser by the above-ground parts of the plants was not affected by the time of fertiliser application. At the female-flowering and fruit-ripening stages, the N content derived from 15N-labelled fertiliser was close to 0.435 g m−2 (about 45% of the N applied), while in the middle of fruit growth it was 1.45 g m−2 (71% of the N applied). The N application time affected the amount of N derived from labelled fertiliser that was translocated to the fruits. When the N was supplied later, the N translocation was lower, ranging between 54% at female flowering and 32% at the end of fruit ripening. Approximately 85% of the N translocated came from the leaf when the N was applied at female flowering or in the middle of fruit growth. This value decreased to 72% when the 15N application was at the end of fruit ripening. The ammonium nitrate became available to the plant between 2 and 2.5 weeks after its application. Although the leaf N uptake varied during the crop cycle, the N absorption rate in the whole plant was linear, suggesting that the melon crop could be fertilised with constant daily N amounts until 2–3 weeks before the last harvest.

Más información

ID de Registro: 12247
Identificador DC: http://oa.upm.es/12247/
Identificador OAI: oai:oa.upm.es:12247
Identificador DOI: 10.1016/j.scienta.2011.08.003
Depositado por: Memoria Investigacion
Depositado el: 14 Ago 2012 12:01
Ultima Modificación: 21 Abr 2016 11:29
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