Soybean cultivation for Bioregenerative Life Support Systems (BLSSs): The effect of hydroponic system and nitrogen source |
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| Authors: | Roberta Paradiso Roberta Buonomo Mike A. Dixon Giancarlo Barbieri Stefania De Pascale |
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| Affiliation: | 1. Department of Agricultural Sciences, University of Naples Federico II, Naples, Italy;2. School of Environmental Sciences, University of Guelph, Ontario, Canada |
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| Abstract: | Soybean [Glycine max (L.) Merr.] is one of the plant species selected within the European Space Agency (ESA) Micro-Ecological Life Support System Alternative (MELiSSA) project for hydroponic cultivation in Biological Life Support Systems (BLSSs), because of the high nutritional value of seeds. Root symbiosis of soybean with Bradirhizobium japonicum contributes to plant nutrition in soil, providing ammonium through the bacterial fixation of atmospheric nitrogen. The aim of this study was to evaluate the effects of two hydroponic systems, Nutrient Film Technique (NFT) and cultivation on rockwool, and two nitrogen sources in the nutrient solution, nitrate (as Ca(NO3)2 and KNO3) and urea (CO(NH2)2), on root symbiosis, plant growth and seeds production of soybean. Plants of cultivar ‘OT8914’, inoculated with B. japonicum strain BUS-2, were grown in a growth chamber, under controlled environmental conditions. |
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| Keywords: | AUE, acid use efficiency BUE, base use efficiency BLSSs, bioregenerative life support systems Cv, cultivar (cultivated variety) DAS, days after sowing DM, dry matter EC, electrical conductivity HI, harvest index LA, leaf area NFT, nutrient film technique PAR, photosynthetically active radiation RUE, radiation use efficiency RW, rockwool WUE, water use efficiency |
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