effect in both substrate and hydroponic conditions during the vegetative growth stage. Species pH effect was quantified as mEq of root zone acidity–basicity per gram dry weight gain per plant in substrate and hydroponics. For plants grown in substrate
Abstract
Cuttings of Ficus benjamina L. and Chrysanthemum × morifolium(Dendranthema grandiflora tzvelev.) were rooted in aero-hydroponics to study the effect of dissolved oxygen concentrations in the range of 8 mg·liter. (ambient saturation) to 0 mg·liter−1. The results of this study indicate that dissolved oxygen is essential to root formation and root growth. Woody (Ficus) and herbaceous (Chrysanthemum) cuttings responded similarly. Lowering the dissolved oxygen concentration increased the time required to form adventitious roots, reduced rooting percentages, reduced numbers of roots formed per cutting, and reduced average root lengths. Comparisons between stirred and unstirred water suggested the development of an area of depleted oxygen concentration (boundary layer) at the stem-water interface on cuttings immersed in unstirred water. Cuttings in water stirred constantly rooted sooner and formed more roots than did those in unstirred water. Maximum rooting occurred in misted (high dissolved oxygen concentrations) sections of cuttings suspended in the aero-hydroponics chambers. Chemical name used: potassium salt of lH-indole-3-butyric acid (K-IBA).
effect of microbubbles on the growth of leaf lettuce in a deep flow technique (DFT) hydroponics culture system. To understand the effects of microbubbles on plant growth, we compared lettuce treated with macrobubbles generated by aquarium aeration stones
al. 2019 ). Nevertheless, further research is needed to identify and characterize lettuce accessions with higher PUE in hydroponics. P-efficient lettuce accessions could benefit hydroponic growers by reducing P inputs and/or improving the efficiency
for screening stress tolerance in different plants, demanding lower resources, materials, and time than field trials ( Sakhanokho and Kelley, 2009 ). Hydroponics has been used to access herbicide tolerance or resistance in weeds ( Brosnan et al., 2014
bioavailability compared with unchelated Cu ( Tills 1987 ). Chelates also minimize Cu binding to hydroxide and phosphate ions ( Jurinak and Inouye 1962 ). Chelation can decrease Cu availability in hydroponics because it must be extracted from the chelate
Abstract
Hydroponic and aeroponic methods have been used to study the propagation and growth of plants (1, 2, 4). A combination of these two methods of liquid culture, aero-hydroponics, has been developed (3). Known as the Ein Gedi System (EGS), this aerohydroponics method incorporates the advantages (buffered nutrient capacity of hydroponics and water oxygenation of aeroponics) of both types of liquid culture. The objective of this study was to compare aero-hydroponics (EGS) and solid media for cutting propagation with and without overhead mist.
trending topic among online communities, which are significant drivers for this growing market segment ( Garden Media Group, 2019 ; Thij et al., 2016 ). As of Nov. 2019, indoor gardening subreddits such as r/UrbanFarming, r/Hydroponics, and r
according to RGR? To what extent are these determined by irradiance or time of year and by conditions of the nutrient solution in hydroponics? Irradiance is the primary factor affecting RGR ( Gent, 2014 ). However, a function of light intercepted by the crop