Ammonium reduces growth,fruit yield and fruit quality of watermelon |
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| Authors: | E H Simonne H A Mills D A Smittle |
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| Institution: | Department of Horticulture , University of Georgia , Athens, GA, 30602–7273 |
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| Abstract: | Watermelon (Citrullus lunatus Thunb.) plants cv ‘Sugar Baby’ were grown hydroponically in a greenhouse under NO3:NH4 ratios of 3:1, 1:1, and 1:3. Plants receiving the high ammonium treatment expressed symptoms of NH4‐toxicity and declined rapidly after bloom. Reducing NO3:NH4 from 3:1 to 1:1 significantly reduced growth, water use, fruit yield, flesh soluble solids and uptake of NO3, NH4, K, Ca and Mg. |
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