DESENVOLVIMENTO INICIAL DE PLANTAS DE Eucalyptus platyphylla SUBMETIDAS A NÍVEIS DE SALINIDADE

Abstract

RESUMOO objetivo deste trabalho foi avaliar o comportamento morfológico de plantas de Eucalyptus platyphylla quando submetidas a cinco níveis de salinidade de solo. A pesquisa em questão foi conduzida em casa de vegetação, na área experimental do Departamento de Engenharia Rural da FCA/UNESP, Botucatu-SP, utilizando-se de vasos plásticos preenchidos com solo contendo doses de NaCl, em quantidades suficientes para elevar o nível de condutividade elétrica. O experimento foi realizado em blocos ao acaso, em esquema fatorial 5 x 4, com 5 condutividades elétricas (1,41; 2,50; 4,50; 6,45 e 8,33 dS m -1 ) e quatro repetições. Os resultados evidenciaram que a salinidade do solo não afetou significativamente os seguintes parâmetros analisados: altura, massa de matéria fresca e seca da parte aérea e de raiz das plantas e área foliar.Palavras-chave: condutividade elétrica, NaCl, morfofisiologia. LOPES, T. de C.; LIMA, K. B. de; KLAR, A. E. INITIAL DEVELOPMENT OF Eucalyptus platyphylla SUBJECTED TO LEVELS OF SALINITY 2 ABSTRACTThe objective of this study was to evaluate the behavior of morphological Eucalyptus platyphylla when subjected to five levels of soil salinity. The research project was conducted in a greenhouse at the experimental area of the Department of Agricultural Engineering of the FCA / UNESP, Botucatu-SP, utilizing plastic pots filled with soil containing NaCl concentrations, in sufficient quantities to raise the level of electrical conductivity. The experiment was conducted in randomized blocks in factorial scheme 5 x 4, 5 electrical conductivities (1.41, 2.50, 4.50, 6.45 and 8.33 dS m-1) and four repetitions. The results showed that soil salinity did not significantly affect the following parameters: height, green mass and dry matter of shoot, and root and leaf area of the plants.

Growth of eucalyptus plants irrigated with saline water

“…The increase in electrical conductivity of the irrigation water and consequent reduced potential of the solution were not sufficient to generate significant alterations to growth variables (height, diameter and biomass). The results confirm those of Lopes et al (2012) when evaluating the growth of eucalyptus irrigated with saline water. The sustained growth under the conditions imposed represents an important sign of tolerance to salinity (Matos et al, 2013).…”

“…According to Lopes et al (2012), the Eucalyptus platyphylla plants are tolerant to irrigation water salinity, as they present small variation in diameter and plant height when irrigated with low quality water. However, little is known about the tolerance of Eucalyptus plants to salinity.…”

Growth of Spondias tuberosa Irrigated With Saline Water

“…S. tuberosa, but the frequency of reservoirs with low quality water should be taken into consideration when setting up the orchard. Irrigation with saline water is the reality in semiarid regions where quality water is not available for agriculture (Lopes, Lima, & Klar, 2012). Salinity causes drop in crop yields due to the osmotic, toxic and/or nutritional effects (Negrão Schmöckel, & Tester, 2017;Zörb, Geilfus, & Dietz, 2018).…”

GROWTH OF <i>Tectona grandis</i> SEEDLINGS IRRIGATED WITH SALINE WATER

“…Brazil has about 30 million hectares with irrigation potential spread from north to south (BRASIL, 2015). The saline water irrigation is a reality in semi-arid regions that do not have quality water for agriculture (LOPES et al, 2012).…”

“…However, conductivity lower than 4 dS m -1 may not have an adverse effect on the tree productivity. Souza et al (2015) and Lopes et al (2012), evaluated seedlings of Eucalyptus urophylla and Eucalyptus platyphylla and concluded that the growth of eucalyptus plants has little variation when the plants are irrigated with water conductivity from 0 to 8 dS m -1 , but, most of the surveys were carried out with Eucalyptus plants, requiring the development of studies with other forest species such as Tectona grandis.…”