Production of Lettuce Seedlings with Association of Diazotrophic Bacteria and Humic Acids

Rocha De Moraes Rego, Carlos Augusto and Penha Costa, Bruna and Carpiski Sampaio, Marinez and Massuo Kashiwaki, Marcos and Silva Caetano, Joao Henrique and Francisco Guimaraes, Vandeir and López de Herrera, Juan and Ribeiro Coutinho, Pablo Wenderson and Yuji Tsutsumi, Claudio and Fortado Vera Cruz, Maria Soraia and Nepomuceno Alves, Thatiane and Souza Oliveira, Shirlene and Pinguelli Ristau, Ana Carolina and Braz, Hanna (2018). Production of Lettuce Seedlings with Association of Diazotrophic Bacteria and Humic Acids. "American Journal of Plant Sciences", v. 9 ; pp. 946-957. ISSN 2158-2742. https://doi.org/10.4236/ajps.2018.95072.

Description

Title: Production of Lettuce Seedlings with Association of Diazotrophic Bacteria and Humic Acids
Author/s:
  • Rocha De Moraes Rego, Carlos Augusto
  • Penha Costa, Bruna
  • Carpiski Sampaio, Marinez
  • Massuo Kashiwaki, Marcos
  • Silva Caetano, Joao Henrique
  • Francisco Guimaraes, Vandeir
  • López de Herrera, Juan
  • Ribeiro Coutinho, Pablo Wenderson
  • Yuji Tsutsumi, Claudio
  • Fortado Vera Cruz, Maria Soraia
  • Nepomuceno Alves, Thatiane
  • Souza Oliveira, Shirlene
  • Pinguelli Ristau, Ana Carolina
  • Braz, Hanna
Item Type: Article
Título de Revista/Publicación: American Journal of Plant Sciences
Date: April 2018
ISSN: 2158-2742
Volume: 9
Subjects:
Freetext Keywords: Azospirillum brasilense; Humic Substances; Lactuca sativa L.; Productive Characteristics
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Ingeniería Agroforestal
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The objective of this work was to verify the responses in agronomic and physiological characters of lettuce seedlings when submitted to different doses of humic acids and the presence or absence of inoculation of the bacterium Azospirillum brasilense. The experiment was carried out at the Protected Cultivation Station and Biological Control Teacher Mário César Lopes, belonging to the Experimental Stations Nucleus of the State University of the West of Paraná. The experimental design was a randomized block design, in a 5 × 2 factorial scheme, with four repetitions, totaling 40 plots. The first factor consisted of five solutions containing humic acid (100%, 75%, 50%, 25% and 0%) and the second factor was the presence or absence of the diazotrophic bacterium Azospirillum brasilense obtained by commercial product. Germination tests were carried out in addition to the determination of agronomic characters such as the number of fully expanded leaves, plant height, stem diameter, main root length, shoot dry mass, root dry mass, total dry mass, and Dickson quality index. The association of diazotrophic bacteria and humic acids did not influence the emergency rate, mean emergence time, mean speed of emergency, emergence speed index, plant height, and root length of lettuce seedlings. The dilutions of humic acids, regardless of inoculation with bacteria diazotrophic favored the development of the number of leaves, stem diameter and Dickson quality index. Inoculation of lettuce seeds with diazotrophic bacteria associated with the addition of humic acids, favored the development of the dry mass of root and total dry matter.

More information

Item ID: 54958
DC Identifier: http://oa.upm.es/54958/
OAI Identifier: oai:oa.upm.es:54958
DOI: 10.4236/ajps.2018.95072
Official URL: https://www.scirp.org/journal/PaperInformation.aspx?PaperID=83820
Deposited by: Memoria Investigacion
Deposited on: 24 Jun 2019 10:53
Last Modified: 24 Jun 2019 10:53
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