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Articles 1 - 9 of 9
Full-Text Articles in Plant Sciences
Nutrient Management For Recirculating Hydroponics, Noah J. Langenfeld, Lauren E. Payne, Bruce Bugbee
Nutrient Management For Recirculating Hydroponics, Noah J. Langenfeld, Lauren E. Payne, Bruce Bugbee
Hydroponics/Soilless Media
Steady-state nutrient management is essential in hydroponic culture. Determination of an appropriate refill solution is attained using the principle of mass balance. Optimizing the ratio of nutrient elements and refill solution concentrations requires an understanding of the ratio of nutrients in tissue to water, which is measured as water use efficiency (WUE). This ratio is then multiplied by the desired concentration of nutrients in leaf tissue to determine the refill solution composition. Deep-flow hydroponics enables constant monitoring of solution parameters and root health. We have achieved a steady-state nitrogen concentration in solution by using an automated pH control system that …
Reduced Chelate Strength Increases Iron Bioavailability For Monocots In Hydroponic Culture, Paul Kusuma, Bruce Bugbee
Reduced Chelate Strength Increases Iron Bioavailability For Monocots In Hydroponic Culture, Paul Kusuma, Bruce Bugbee
Hydroponics/Soilless Media
Hydroponically grown corn (Zea mays) is highly susceptible to Fe-chlorosis. Iron (Fe) is essential for chlorophyll synthesis. Metals bound to chelates have reduced bioavailability (activity) compared to free ions.
Measurement Of The Respiratory Quotient Of Peat, Jake Nelson
Measurement Of The Respiratory Quotient Of Peat, Jake Nelson
Hydroponics/Soilless Media
Respiratory quotient (RQ) is the ratio of CO2 produced to O2 consumed by an organism. Complete respiration of glucose will give an RQ of 1 as described by the formula CnH2nOn+nO2→nCO2+nH2O. The respiration of molecules with lower oxygen content, such as lipids, give RQ values of less than one, whereas in cases of anaerobic metabolism, an increase in biomass or the respiration of substances such as humic, oxalic and citric acids the respiratory quotient can be greater than one. In complex systems such as soil, Dilly …
Optimization Of Soilless Media For Alkaline Irrigation Water, Cody Alexander Tramp, Julie K. Chard, Bruce Bugbee
Optimization Of Soilless Media For Alkaline Irrigation Water, Cody Alexander Tramp, Julie K. Chard, Bruce Bugbee
Hydroponics/Soilless Media
High root zone pH reduces nutrient availability and high alkalinity water is strongly buffered around an alkaline pH. Soilless media can be altered to improve nutrient availability. This study was conducted to optimize the composition of soilless media for use with high alkalinity water. Mixes of peat and/or perlite or vermiculite in 50/50 and 33/33/33 volumetric ratios were tested. In some studies, mixes were also amended with up to 2.4 g/L of dolomite limestone to neutralize the initial acidity of the peat. Mixes containing vermiculite settled more, had higher water holding capacity (WHC) and percent plant available water (%PAW), and …
A Comparison Of Coconut Coir And Sphagnum Peat As Soil-Less Media Components For Plant Growth, Jason Holman, Bruce Bugbee, Julie K. Chard
A Comparison Of Coconut Coir And Sphagnum Peat As Soil-Less Media Components For Plant Growth, Jason Holman, Bruce Bugbee, Julie K. Chard
Hydroponics/Soilless Media
Coconut coir, a by-product of the coconut industry, has been promoted as an alternative to peat moss in soil-less media. Sphagnum peat moss has long been a standard component of soil-less media, but some people have expressed concern that it is a non-renewable resource. Although it does not appear that world peat resources will be in short supply for a very long time, coconut coir may have characteristics that make it a useful component of soil-less media mixes. Coir has been considered to promote excellent plant growth but there are few rigorous studies that have compared it with peat moss …
Carrot Cultivar Evaluation: Soilless Media Vs. Hydroponics, Derek R. Pinnock, Bruce Bugbee
Carrot Cultivar Evaluation: Soilless Media Vs. Hydroponics, Derek R. Pinnock, Bruce Bugbee
Hydroponics/Soilless Media
Nine cultivars of carrots were grown in a growth chamber. Each cultivar was grown both in hydroponic and soil-less media root-zone for sixty days. Three 30L tubs were used for each root-zone treatment. Three cultivars were planted in each tub, initially at 180 plants m-2 then thinned to 90 plants m-2 on day 45.
Hydroponic Vs. Soilless Media: Interaction With Plant Density, Derek R. Pinnock, Bruce Bugbee
Hydroponic Vs. Soilless Media: Interaction With Plant Density, Derek R. Pinnock, Bruce Bugbee
Hydroponics/Soilless Media
Water stress can cause early heading in some plant species. ‘Super Dwarf’ rice was grown in hydroponic culture and soilless media to determine if a slight water stress, caused by the soilless media, would cause earlier heading.
Long-Term Effects Of Nh4+/No3- Ratios On Growth And Nitrification In Hydroponic Culture, Bruce Bugbee
Long-Term Effects Of Nh4+/No3- Ratios On Growth And Nitrification In Hydroponic Culture, Bruce Bugbee
Hydroponics/Soilless Media
Wheat can be grown in high NH4+ with little effect on growth and yield
Counter ion had no effect on Ca2+ uptake in these studies
Inoculation with nitrifying microorganisms may help alleviate high NH4+ problems
The Long-Term Effects Of High Nh4 +/No3 - Ratios On Wheat Growth And Nitrification In Hydroponic Culture, D. J. Muhlestein, T. Hooten, J. M. Norton, Bruce Bugbee
The Long-Term Effects Of High Nh4 +/No3 - Ratios On Wheat Growth And Nitrification In Hydroponic Culture, D. J. Muhlestein, T. Hooten, J. M. Norton, Bruce Bugbee
Hydroponics/Soilless Media
Wheat can be grown in high NH4+ with little effect on growth and yield
Counter ion had no effect on Ca2+ uptake in these studies.
Inoculation with nitrifying microorganisms may help alleviate high NH4+ problems