GROWTH OF Tectona grandis SEEDLINGS IRRIGATED WITH SALINE WATER

The objective of the present study was to evaluate the effect of the irrigation water salinity on the initial growth of Tectona grandis plants. The work was carried out in a greenhouse with 100% solar radiation interception at Goiás State University, Ipameri Campus, Brazil. The Tectona grandis seeds...

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Bibliographic Details
Published in:Ciência florestal 2018-11, Vol.27 (3)
Main Authors: Freitas, Igor Alberto Silvestre, Santos, Lidiane Villas Boas dos, Silva, Ana Carolina Ferreira da, Silva, Camylla Reis da, Silveira, Patrícia Souza da, Matos, Fábio Santos
Format: Article
Language:English
Subjects:
abiotic stress
condutividade elétrica
electrical conductivity
estresse abiótico
forestry
silvicultura
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Summary:The objective of the present study was to evaluate the effect of the irrigation water salinity on the initial growth of Tectona grandis plants. The work was carried out in a greenhouse with 100% solar radiation interception at Goiás State University, Ipameri Campus, Brazil. The Tectona grandis seeds were sown in eight-liter pots containing a mixture of soil, sand and manure at ratio 3:1:0.5, respectively. At 100 days after germination, the plants were irrigated daily with water of different electrical conductivity (0, 2, 4, 6, and 8 dS m-1) for 30 days and then subjected to analysis Tectona grandis to stay alive and reduced water loss by transpiration through efficient stomatal control. Tectona grandis plants in the early stages of development are highly sensitive to salinity stress, significantly slowing down vegetative growth. O presente estudo objetivou avaliar o efeito da salinidade da água de irrigação no crescimento inicial de plantas de Tectona grandis. O trabalho foi conduzido em casa de vegetação com interceptação de 100% da radiação solar na Universidade Estadual de Goiás, Campus de Ipameri, Brasil. As sementes de Tectona grandis foram semeadas em vasos de oito litros contendo uma mistura de solo, areia e esterco na proporção de 3:1:0,5, respectivamente. Aos 100 dias após a germinação, as plantas foram irrigadas diariamente com água de diferentes condutividades elétricas (0; 2; 4; 6 e 8 dS m-1) durante 30 dias e, em seguida, submetidas às analises. Para se manterem vivas, as plantas de Tectona grandis reduziram a perda de água por transpiração através de um eficiente controle estomático. As plantas de Tectona grandis na fase inicial de desenvolvimento apresentam elevada sensibilidade ao estresse salino, inclusive com significativa redução do crescimento vegetativo.
ISSN:0103-9954