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
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Ryan W. Dickson and Paul R. Fisher
Jong-Seok Park and Kenji Kurata
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
Matthew A. Cutulle, H. Tyler Campbell, Monica Farfan, and Phillip A. Wadl
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
Elisa Solis-Toapanta, Andrei Kirilenko, and Celina Gómez
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
Martin P.N. Gent
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
Joshua K. Craver and Kimberly A. Williams
greenhouse industry is shifting away from solely producing herbaceous ornamental crops and integrating or replacing these crops with vegetables and herbs. For this reason, hydroponics and other systems using recirculated nutrient solution have become an
Joshua D. Butcher, Charles P. Laubscher, and Johannes C. Coetzee
anaerobic respiration. Oxygenation in Hydroponics Plant growth has been shown to increase when irrigated with additional dissolved oxygen (DO) in the solution ( Soffer et al., 1990 ), therefore, in hydroponics it is important that oxygen is dissolved in the
Vincent Martineau, Mark Lefsrud, Most Tahera Naznin, and Dean A. Kopsell
level for being considered as a replacement to HPS lamps in hydroponics growth environments. LED lamps are anticipated to replace HPS lamps in most applications as a result of their reduced electricity consumption, improved quality of light, and the
Kathleen M. Ready and Allen V. Barker
Many people want to use hydroponics in production of plants but often are hobbyists with limited access to the reagents necessary to formulate a nutrient solution. Several readily available commercial fertilizers and chemicals with tomato-(Lycopersicon esculentum Mill.) as the test plant were used to develop a nutrient solution. A 20-8.8-16.6 IN-P-K) general purpose fertilizer was added (1 g/liter) to deionized water to make a basic solution. This solution was fortified with slow-release fertilizer (approx. 17N-2.6P-8.5K with Ca, Hg, and minor elements) at 1 g/liter added directly to hydroponics vessels. Tomato developed severe foliar symptoms of Ca deficiency in this medium. Addition of CaSO4 or CaCO3 at 0.5 or 1 g/liter to give a solid phase of these chemicals in the vessels prevented development of symptoms of Ca deficiency; however, plants now showed symptoms of Mg deficiency. Addition of MgS0 at 0.25 g/liter to the basic solution prevented symptoms o Mg deficiency. Analyses confirmed that leaf N, P, K, Ca, and Mg were sufficient.
This solution was as good as Hoagland's No. 1 solution for growth of tomato, marigold, and cucumber and was better than Hoagland's solution for growth of corn and wheat.