Saline water irrigation managements on growth of ornamental plants

Abstract

A B S T R A C TBiosaline agriculture is an option for using waters with lower quality. Thus, the objective of this study was to evaluate the growth of ornamental species under irrigation with increasing water salinity levels in two methods of water application. The study was conducted in a greenhouse, in the municipality of Fortaleza, Ceará, Brazil. The treatments were distributed in randomized blocks in split plots, with six levels of water salinity in the plots (0.6 -control, 1.2, 1.8, 2.4, 3.0 and 3.6 dS m -1 ), two methods of water application in the subplots (localized and sprinkler irrigation) and four ornamental species in the sub-subplots (Catharanthus roseus, Allamanda cathartica, Ixora coccinea and Duranta erecta), with four replicates. Increase in irrigation water electrical conductivity reduced the growth of the studied ornamental species. It was not possible to establish an ideal method for irrigation of ornamental species. Effects of non-localized irrigation on leaf growth were more evident in the species C. roseus and D. erecta, which showed higher specific leaf area.Manejos de irrigação com água salina sobre o crescimento de plantas ornamentais R E S U M O A agricultura biossalina é uma opção para o uso de águas com qualidade inferior. Com isso, objetivou-se avaliar o crescimento de espécies ornamentais sob irrigação com níveis crescentes de água salina e dois modos de aplicação. O estudo foi conduzido em ambiente protegido, no município de Fortaleza, Ceará, Brasil. Os tratamentos foram distribuídos em blocos casualizados, em parcelas subsubdivididas, com seis níveis de salinidade da água nas parcelas (0,6 -testemunha; 1,2; 1,8; 2,4; 3,0 e 3,6 dS m -1 ), dois modos de aplicação de água nas subparcelas (irrigação localizada e aspersão) e quatro espécies ornamentais nas subsubparcelas (Catharanthus roseus, Allamanda cathartica, Ixora coccinea e Duranta erecta), com quatro repetições. O aumento na condutividade elétrica da água de irrigação reduziu o crescimento das espécies ornamentais estudadas. Não foi possível estabelecer um método ideal para a irrigação das espécies ornamentais. Os efeitos da irrigação não localizada sobre o crescimento foliar foram mais evidentes sobre as espécies C. roseus e D. erecta, as quais apresentaram maior área foliar específica. Key words:water quality salt stress salt tolerance ornamentals species Palavras-chave: qualidade de água estresse salino tolerância à salinidade espécies ornamentais

A Cut Flower Cultivation under Saline Conditions: <i>C. morifolium</i> Ramat ‘Bacardi’

“…Yasemin (2020) [20] also presented that branch number and length of Zinnia elegans and Zinnia marylandica decreased as salinity increased. There are several studies that shown reducing plant heights and biomass under saline conditions [16,14,17,21,22,6,23]. There is not too much known the effects of salinity on flowering parameters.…”

Emergence and initial growth of Celosia argentea L. cultivated under irrigation with brackish water

“…Some studies on irrigation management of ornamental plants with lower quality water were developed by Oliveira et al (2017), Moore et al (2019), Bezerra et al (2020) and Xing et al (2021) and observed that the increase in the electrical conductivity of irrigation water reduced the growth of the ornamental species Catharanthus roseus, Allamanda cathartica, Ixora coccinea, Duranta erecta, Coleus hybridus, Acalypha wilkesiana, Ficus benjamina, Jasminium multiflorum and Plumbago auriculata. Although there are species that develop satisfactorily in saline conditions, most species are sensitive to excess salts in irrigation water, requiring studies to evaluate better management strategies (Oliveira et al, 2017).…”

Improving Tolerance of Cortaderia Selloana Plants to Irrigation Water Salinity Through Salicylic Acid Application

“…This was documented by El-Fouly et al (2015) on Iris tingitana cv. Wedgewood, Oliveira et al (2017) on Catharanthus roseus, Allamanda cathartica, Ixora coccinea and Duranta erecta; in addition to Bian and Pan (2018) on Narcissus tazzeta var. chinensis, Hassan and Abd El-Azeim (2019) on Polianthes tuberosa and Hoang et al (2020) on Amaranthus tricolor.…”