| Registro completo |
| Provedor de dados: |
AGRIAMBI
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| País: |
Brazil
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| Título: |
Water salinity, nitrogen and phosphorus on photochemical efficiency and growth of west indian cherry
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| Autores: |
Sá,Francisco V. da S.
Gheyi,Hans R.
Lima,Geovani S. de
Paiva,Emanoela P. de
Moreira,Rômulo C. L.
Silva,Luderlândio de A.
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| Data: |
2018-03-01
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| Ano: |
2018
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| Palavras-chave: |
Chlorophyll fluorescence
Saline stress
Fertilization
Malphigia emarginata
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| Resumo: |
ABSTRACT The objective of this study was to evaluate the interaction between water salinity and doses of nitrogen and phosphorus on chlorophyll a fluorescence and on the growth of West Indian Cherry (‘acerola’) plants in the initial growth stage. The research was carried out in a protected environment, in lysimeters filled with Regolithic Neosol of loamy clay texture and low initial phosphorus content. The experiment was conducted in a randomized block design, arranged in a factorial scheme with two factors, five levels of electrical conductivity of the irrigation water - ECw (0.6, 1.4, 2.2, 3.0 and 3.8 dS m-1) and four proportions of the recommendation of phosphorus/nitrogen - P/N (100:100, 140:100, 100:140 and 140:140% P/N of recommendation), with three replicates, and each plot consisted of one plant. Water salinity above 2.2 dS m-1 decreases the quantum efficiency of photosystem II and the growth of west indian cherry plants. Increase in nitrogen and/or phosphorus supply improves the energy stability of west indian cherry plants by reducing the effects of salt stress on the quantum efficiency of photosystem II. The increase of 40% in the nitrogen dose increased the chlorophyll a fluorescence, but did not influence the plant growth.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662018000300158
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| Editor: |
Departamento de Engenharia Agrícola - UFCG
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| Relação: |
10.1590/1807-1929/agriambi.v22n3p158-163
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Engenharia Agrícola e Ambiental v.22 n.3 2018
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| Direitos: |
info:eu-repo/semantics/openAccess
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