African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6578

Full Length Research Paper

Differences between genotypes of Jatropha curcas L. are evidenced for absorption and use of nitrogen

Leonardo Fardim Christo
  • Leonardo Fardim Christo
  • Centro de Ciências Agrárias of Universidade Federal do Espírito Santo (CCA/UFES), Alto Universitário, Caixa Postal 16, Alegre-ES, Brazil.
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Lima Deleon Martins
  • Lima Deleon Martins
  • Centro de Ciências Agrárias of Universidade Federal do Espírito Santo (CCA/UFES), Alto Universitário, Caixa Postal 16, Alegre-ES, Brazil.
  • Google Scholar
Tafarel Victor Colodett
  • Tafarel Victor Colodett
  • Centro de Ciências Agrárias of Universidade Federal do Espírito Santo (CCA/UFES), Alto Universitário, Caixa Postal 16, Alegre-ES, Brazil.
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Wagner Nunes Rodrigues
  • Wagner Nunes Rodrigues
  • Centro de Ciências Agrárias of Universidade Federal do Espírito Santo (CCA/UFES), Alto Universitário, Caixa Postal 16, Alegre-ES, Brazil.
  • Google Scholar
Sebastião Batista Brinate
  • Sebastião Batista Brinate
  • Centro de Ciências Agrárias of Universidade Federal do Espírito Santo (CCA/UFES), Alto Universitário, Caixa Postal 16, Alegre-ES, Brazil.
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José Francisco Teixeira do Amaral
  • José Francisco Teixeira do Amaral
  • Centro de Ciências Agrárias of Universidade Federal do Espírito Santo (CCA/UFES), Alto Universitário, Caixa Postal 16, Alegre-ES, Brazil.
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Marcelo Antonio Tomaz
  • Marcelo Antonio Tomaz
  • Centro de Ciências Agrárias of Universidade Federal do Espírito Santo (CCA/UFES), Alto Universitário, Caixa Postal 16, Alegre-ES, Brazil.
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Bruno Galvêas Laviola
  • Bruno Galvêas Laviola
  • Empresa Brasileira de Pesquisa Agropecuária, Embrapa Agroenergia. Parque Estação Biológica, Asa Norte, Brasília-DF, Brazil.
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  •  Received: 17 March 2014
  •  Accepted: 16 June 2014
  •  Published: 27 June 2014

Abstract

The objective of this study was to quantify the nutritional efficiency and responsiveness in relation to nitrogen of twelve genotypes of physic nut (Jatropha curcas L.) grown in soil without nitrogen supply and also with three levels of fertilization in a controlled environment. The experiment was conducted in factorial scheme 12 × 4 with four replications, the factors being: 12 genotypes of physic nut and four levels of nitrogen fertilization, studied in a randomized design. The plants were grown in pots, without restrictions, for 100 days and their dry matter and N contents were evaluated (for roots, leaves and total). Subsequently, the efficiency ratios for absorption, translocation, use and responsiveness in relation to the N supply were calculated. Overall, the nutritional efficiencies for nitrogen increase linearly with the increase of nitrogen supply in the soil. The genotypes CNPAE 161-II, CNPAE 167-II, CNPAE 180-I, CNPAE 255-I and CNPAE 300-I were classified as efficient and responsive to nitrogen fertilization being highlighted for plant breeding programs aiming to improve this agronomic trait.

 

Key words: Physic nut, mineral nutrition, alpha parameter.