Biomass and leaf chlorophyll in oiticica seedlings under water salinity irrigaton and organic compound addition
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Data
2020-01-01
Autores
Cavalcante, Alian Cássio Pereira
Neto, Manoel Alexandre Diniz
Cavalcante, Lourival Ferreira
De Luna Souto, Antônio Gustavo
Cavalcante, Adailza Guilherme [UNESP]
Diniz, Belísia Lúcia Moreira Toscano
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Resumo
Salt-compromised agricultural areas in the semi-arid regions of the Brazilian Northeast, have increased due to the use of water with high saline concentration as the only water supply available to plants, damaging the quality of the seedlings and the productive yield of the crops. One way to alleviate the detrimental effects of salts is the addition of organic compound to the substrate as a way to attenuate the action of water and soil salinity on biomass formation and chlorophyllactic activity in seedlings and adult plants of forest species, including Licania rigida Benth, the Oiticica. In view of this issue, the objective of this study was to evaluate the effects of water salinity irrigation and of the addition of an organic compound obtained by fermentation of castor bean (Ricinus communis) and cattle manure on biomass accumulation and chlorophyll indices in Oiticica seedlings. The experiment was carried out in a 4 × 2 factorial scheme in randomized blocks, with five replications and two seedlings per plot, relative to the proportions of organic compost - C and soil - S (0C: 1S, 1C: 1S, 2C: 1S, 3C: 1S) and irrigation of the seedlings with non-saline (0.5 dS m-1) and saline (4.5 dS m-1) water. The increase of organic compound in the substrate in proportion to the soil of 3: 1 surpassed by 42.9% the biomass of the aerial part of the Oiticica seedlings irrigated with saline water. The results indicate that the organic compound mitigates, though does not eliminate, the detrimental effects of water salinity irrigation on the biomass formation and chlorophyllactic indexes of the seedlings.
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Chlorophyllactic pigments, Licania rigida benth, Organic input, Phytomass, Saline stress
Como citar
Floresta, v. 50, n. 2, p. 1161-1170, 2020.