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 and Castellanos Serrano, Maria Teresa and Tarquis Alfonso, Ana Maria and Cartagena Causape, Maria Carmen and Arce Martinez, Augusto and 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.

Description

Title: Determination of the uptake and translocation of nitrogen applied at different growth stages of a melon crop (Cucumis melo L.) using 15N isotope.
Author/s:
  • Cabello Cabello, María Jesús
  • Castellanos Serrano, Maria Teresa
  • Tarquis Alfonso, Ana Maria
  • Cartagena Causape, Maria Carmen
  • Arce Martinez, Augusto
  • Ribas Elcorobarrutia, Francisco
Item Type: Article
Título de Revista/Publicación: Scientia horticulturae
Date: September 2011
Volume: 130
Subjects:
Faculty: E.T.S.I. Agrónomos (UPM) [antigua denominación]
Department: Matemática Aplicada a la Ingeniería Agronómica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

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.

More information

Item ID: 12247
DC Identifier: http://oa.upm.es/12247/
OAI Identifier: oai:oa.upm.es:12247
DOI: 10.1016/j.scienta.2011.08.003
Deposited by: Memoria Investigacion
Deposited on: 14 Aug 2012 12:01
Last Modified: 21 Apr 2016 11:29
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