NUTRITIONAL DIAGNOSIS FOR COTTON UNDER SAVANNAH BY USING THE DRIS AND SUFFICIENCY RANGES METHODS

Authors

  • Roberta de Freitas Souza
  • Wilson Mozena Leandro UFG
  • Noé Barroso da Silva Embrapa Rice and Beans image/svg+xml
  • Paulo César Ribeiro da Cunha UFG
  • Paulo Alcanfor Ximenes UFG

DOI:

https://doi.org/10.5216/pat.v41i2.7461

Keywords:

Gossypium sp., leaf analysis, DRIS index, nutritional status

Abstract

Brazil is the fourth largest cotton exporter and fifth largest producer in the world, however, it is predominantly cultivated under savannah soils, which present natural nutrients limitations. The objective of this study was to diagnose the nutritional factors that most limit high cotton yields, by using leaf analysis interpreted with the aid of the DRIS and sufficiency ranges techniques. So, forty-eight leaf samples were collected in a commercial area of Silvânia, Goiás State, Brazil. Ten cotton leaves were collected to a compound sample, at the full flowering stage (90 day after seeding). For interpreting the leaf analyses results, by using the DRIS technique, indexes for each nutrient from each sample were calculated, according to Alvarez & Leite (1992). For the sufficiency range interpretation, standard values were used. Both methods evaluated N, S, B, and Zn as the most limiting nutrients. The DRIS method showed higher sensibility for diagnosing nutritional deficiencies, especially for the B and Zn micronutrients.

KEY-WORDS: Gossypium sp.; leaf analysis; DRIS index; nutritional status.

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Author Biographies

  • Roberta de Freitas Souza
    Departamento de Agricultura, área Produção vegetal
  • Wilson Mozena Leandro, UFG
    Professor titular do Setor de Solos da Escola de Agronomia e Engenharia de Alimentos da UFG.
  • Noé Barroso da Silva, Embrapa Rice and Beans
    Engenheiro Agrônomo formado pela Universidade Federal Rural do RJ. Atualmente trabalha na Embrapa Arroz e Feijão, Goiânia, Goiás.
  • Paulo César Ribeiro da Cunha, UFG
    Aluno de doutorado do programa de pós-graduação em Agronomia, área de concentração Produção Vegetal da Escola de Agronomia e Engenharia de Alimentos da UFG. Professor Titular do Instituto Federal Goiano.
  • Paulo Alcanfor Ximenes, UFG
    Professor titular do Setor de Solos da Escola de Agronomia e Engenharia de Alimentos da UFG.

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Published

2011-06-10

Issue

v. 41, n. 2, Apr./Jun. 2011

Section

Crop Science

License

Authors will not be paid for published articles and must waive their copyright in favor of the PAT journal. On the other hand, they are solely responsible for the content of those articles, even if the Editor holds the right to adjust them to the norms of the journal. Authors are allowed to publish their articles simultaneously in their institutional repositories, as soon as the original publication at the PAT journal is mentioned.

How to Cite

SOUZA, R. DE F. et al. NUTRITIONAL DIAGNOSIS FOR COTTON UNDER SAVANNAH BY USING THE DRIS AND SUFFICIENCY RANGES METHODS. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], v. 41, n. 2, p. 220–228, 10 Jun.2011.