Efficiency of water use in sunflower grown in hydroponic system under saline stress

Engenharia Agrícola

José Amilton Santos Júnior¹  Hans R. Gheyi²  Doroteu H. G. Filho¹  Frederico A. L. Soares¹  Nildo Da S. Dias¹ 

[1] ,Universidade Federal do Recôncavo da Bahia Núcleo de Engenharia de Água e Solo Cruz das Almas BA

关键词: salinity;    plant density;    soilless culture;    Helianthus annuus L.;    salinidade;    densidade de plantio;    cultivo sem solo;    Helianthus annuus L.;   

DOI  :  10.1590/S0100-69162013000400011

来源: SciELO

【 摘 要 】

In order to identify alternatives for the use of saline water in agricultural production, the effects of the use of brackish water in the preparation of the nutrient solution for the cultivation of sunflower (cv. EMBRAPA 122-V2000) were studied in hydroponic system on consumption and efficiency of water use for the production of achenes and biomass. A completely randomized design was used, analyzed in a 5x2 factorial scheme with three replications. The factors studied were five levels of salinity of nutrient solution (1.7 - control; 4.3; 6.0; 9.0; and 11.5dS m-1) and two plant densities - one or two plants per vessel. It was concluded that the water consumption of sunflower is a variable sensitive to the salinity of the nutrient solution, especially after the fourth week of crop, and that the efficiency of water use in the production of achenes and biomass of sunflower is greater when the plant density increases from one to two plants per vessel, even under saline stress.

【 授权许可】

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