Growth, photosynthesis and protein content in cucumber plants as affected by supplied nitrogen form
1991
Heuer, B.
Cucumber plants were grown hydroponically in three different nutrient solutions to determine the effect of NO3-/NH4+ ratio on several parameters. Top and root growth, CO2 fixation, and ion content (K+, Ca+2, NO3-) were always lower when urea and ammonium nitrate were the major N source as compared with a Hoagland solution in which nitrate was the major N source. No significant differences were found in total N and protein content among the three nutrient solution treatments.
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