African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 5921

Full Length Research Paper

Gas exchange and chlorophyll content in tomato grown under different organic fertilizers and biofertilizer doses

Jackson de Mesquita Alves
  • Jackson de Mesquita Alves
  • Agrarian Department and Exact, State University of Paraíba, Catolé do Rocha, PB, Brazil.
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Alex Serafim de Lima
  • Alex Serafim de Lima
  • Agrarian Department and Exact, State University of Paraíba, Catolé do Rocha, PB, Brazil.
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Evandro Franklin de Mesquita
  • Evandro Franklin de Mesquita
  • Agrarian Department and Exact, State University of Paraíba, Catolé do Rocha, PB, Brazil.
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Sebastiao de Oliveira Maia Junior
  • Sebastiao de Oliveira Maia Junior
  • Agricultural Science Center, Federal University of Alagoas, Rio Largo, AL, Brazil.
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Rosinaldo de Sousa Ferreira
  • Rosinaldo de Sousa Ferreira
  • Agricultural Science Center, State University of Paraíba, Areia, PB, Brazil.
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Francisca Lacerda da Silva
  • Francisca Lacerda da Silva
  • Agrarian Department and Exact, State University of Paraíba, Catolé do Rocha, PB, Brazil.
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Jessica da Mota Santos
  • Jessica da Mota Santos
  • Agrarian Department and Exact, State University of Paraíba, Catolé do Rocha, PB, Brazil.
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  •  Received: 30 June 2018
  •  Accepted: 21 August 2018
  •  Published: 11 October 2018

Abstract

The correct management of organic fertilization has been shown as an extremely viable alternative in the production of vegetables, providing high yields concomitant to the reduction of synthetic fertilizers. The improvement of the production can be interpreted by the physiological behavior, favored by the organic fertilization with the supply of nutrients. Thus, an experiment was carried out to evaluate the gas exchange and Soil-Plant Analyses Development (SPAD) chlorophyll content in tomato plants according to types of organic fertilizers and biofertilizer doses. The experimental design was completely randomized with treatments distributed in factorial arrangement (3 x 5), referring to organic fertilizer types (T1: earthworm humus; T2: goat manure and T3: cattle manure) and biofertilizer concentrations (600, 800, 1000, 1200 and 1400 ml), with four replications. The gas exchange and the SPAD chlorophyll content in tomato plants depend on the type of organic fertilizer and the concentration of biofertilizer. It was possible to observe that increasing doses of biofertilizer in the substrate with low organic concentration increase the gas exchange in tomato plants, while high doses together with more concentrated organic fertilizers reduce these characteristics.

Key words: Alternative fertilizer, Lycopersicon esculentum, photosynthesis, organic fertilizer.