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  <titleInfo>
    <title>Effect of shading and growing season on the agronomic performance of jambu</title>
  </titleInfo>
  <name type="personal">
    <namePart>Silva, Andressa de Oliveira</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Barral, Deiviane de Souza</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Rosário, Isabelle Caroline Bailosa do</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Santos, Lucas da Silva</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <name type="personal">
    <namePart>Gomes, Rafaelle Fazzi</namePart>
    <role>
      <roleTerm authority="marcrelator" type="text">creator</roleTerm>
    </role>
  </name>
  <typeOfResource>text</typeOfResource>
  <genre authority="marc">periodical</genre>
  <genre authority="marc">abstract or summary</genre>
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  <abstract>

ABSTRACT - The jambu (Acmella oleracea) production can be
influenced by the growing season and light available for
metabolic processes. This study aimed to assess the agronomic
and physiological performance of two jambu varieties, under
different shading levels, during the winter and summer of
the Brazilian Amazon. Two random block experiments were
conducted, in a 2 x 4 factorial scheme, consisting of two jambu
varieties (yellow and purple flower) and four shading levels
(0, 30, 50 and 70 %), with four replications. Physiological,
growth and yield traits were assessed. There was no significant
interaction between treatments and growing seasons (Amazon
winter and summer) for growth or yield traits, nor between
treatments for the physiological characteristics. The cultivation
without shading screen can increase the shoot dry weight of
both varieties; the yellow flower variety exhibited early-onset
flowering regardless of the shading screen used; the “Amazon
summer” growing season increased the jambu yield by 33 %,
while the 70 % shading reduced the net photosynthetic rate,
consequently not favoring the vegetative development of the
jambu plants. As such, it is recommended that the yellow and
purple flower jambu varieties be grown without shading screen
in the Amazon summer.


KEYWORDS:Acmella oleracea [L.] R. K. Jansen, unconventional
food plant, Amazon.</abstract>
  <abstract>

RESUMO - A produção de jambu pode ser influenciada pela época
de cultivo e luminosidade disponível para processos metabólicos.
Objetivou-se avaliar o desempenho agronômico e fisiológico de
variedades de jambu, em diferentes níveis de sombreamento, no
inverno e verão amazônicos. Foram realizados dois ensaios no
delineamento de blocos ao acaso, em esquema fatorial 2 x 4, sendo
duas variedades de jambu (flor amarela e roxa) e quatro níveis de
sombreamento (0, 30, 50 e 70 %), com quatro repetições. Foram
avaliadas características de crescimento, produção e fisiológicas. Não
houve interação significativa entre os tratamentos e as épocas de cultivo
(inverno e verão amazônicos) para as características de crescimento e
produção. Para as fisiológicas, também não houve interação entre os
tratamentos. O cultivo sem tela pode aumentar a massa seca da parte
aérea em ambas as variedades; a variedade flor amarela apresentou
precocidade para o início do florescimento, independentemente da
tela utilizada; e a época do ano “verão amazônico” proporcionou
aumento de 33 % para a produção de plantas de jambu, enquanto
o nível de 70 % de sombreamento diminuiu a taxa fotossintética
líquida, não favorecendo o desenvolvimento vegetativo do jambu.
Assim, recomenda-se o cultivo das variedades de jambu flor roxa e
amarela em ambiente sem tela no verão amazônico.


PALAVRAS-CHAVE: Acmella oleracea [L.] R. K. Jansen, planta
alimentícia não convencional, Amazônia.</abstract>
  <note>
Publicação online; 26 ref.; 3 tables; 3 illus.; Summaries (En, Pt)</note>
  <subject>
    <topic>JAMBU</topic>
  </subject>
  <subject>
    <topic>SOMBREAMENTO</topic>
  </subject>
  <subject>
    <topic>CARACTERÍSTICAS  AGRONÔMICAS</topic>
  </subject>
  <subject>
    <topic>ÉPOCA DE PLANTIO</topic>
  </subject>
  <subject>
    <topic>PRODUTIVIDADE</topic>
  </subject>
  <subject>
    <topic>FISIOLOGIA VEGETAL</topic>
  </subject>
  <relatedItem type="host">
    <titleInfo>
      <title>Pesquisa Agropecuária Tropical (Brazil)</title>
    </titleInfo>
    <originInfo>
      <publisher>Goiânia-GO UFG. Escola de Agronomia 1999</publisher>
    </originInfo>
    <identifier>2024-2144</identifier>
    <identifier type="issn">1517-6398</identifier>
    <identifier type="local">BR2024001613</identifier>
    <part>
      <text>v. 53 p. 1-9; (2023)</text>
    </part>
  </relatedItem>
  <identifier type="uri">https://www.scielo.br/j/pat/a/pPq6PzGRkmffR5fF7cQj3Cf/?format=pdf&amp;lang=en</identifier>
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    <url>https://www.scielo.br/j/pat/a/pPq6PzGRkmffR5fF7cQj3Cf/?format=pdf&amp;lang=en</url>
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    <recordCreationDate encoding="marc">240627</recordCreationDate>
    <recordChangeDate encoding="iso8601">20240627133642.0</recordChangeDate>
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      <languageTerm authority="iso639-2b" type="code">eng</languageTerm>
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