Response of selected greenhouse ornamental plants to alkalinity in irrigation water

abstract

• Tolerance to alkalinity was evaluated in rose 'Pink Cupido,' ivy geranium 'Peppermint Candy,' vinca 'Apricot Delight,' chrysanthemum 'Miramar,' hibiscus 'Bimini Breeze' and 'Mango Breeze' plants irrigated with solutions containing 0 to 10 mM sodium bicarbonate (NaHCO3). The minimum toxic threshold of NaHCO3 was established as a 10% decrease from the control in chlorophyll concentration (as determined by the SPAD index) and shoot dry mass, which were estimated by using regression models. The ranking for susceptibility to NaHCO3-induced chlorosis was: rose > hibiscus 'Mango Breeze' > ivy geranium > chrysanthemum > hibiscus 'Bimini Breeze" > vinca, with toxic thresholds of 0.8, 2.1, 2.4, 3.2, 4.2, and 6.8 mM NaHCO 3, respectively. The ranking for susceptibility to NaHCO3-induced shoot dry mass reduction was: rose > hibiscus 'Mango Breeze' ivy geranium chrysanthemum hibiscus 'Bimini Breeze" > vinca, with toxic thresholds of 2.0, 7.3, > 10, > 10, > 10, > 10 mM NaHCO 3, respectively. Copyright Taylor & Francis Group, LLC.

authors

• Reed, David

published proceedings

• JOURNAL OF PLANT NUTRITION

author list (cited authors)

• Valdez-Aguilar, L. A., & Reed, D. W.

citation count

• 23

complete list of authors

• Valdez-Aguilar, Luis Alonso||Reed, David Wm

publication date

• January 2007

publisher

• Taylor & Francis  Publisher

published in

• Journal of Plant Nutrition  Journal

keywords

• Chrysanthemum
• Floriculture
• Hibiscus
• Ivy Geranium
• Rose
• Sodium Bicarbonate
• Vinca
• Water Quality

Digital Object Identifier (DOI)

• 10.1080/01904160601171983

start page

• 441

end page

• 452

volume

• 30

issue

• 3

URL

• http://dx.doi.org/10.1080/01904160601171983