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Modulation of the growth performance and nutrients of sweet potato upon foliar application of fulvic acid
Abstract
Fulvic acid (FA) can stimulate the growth of varying plants. Thus, this study investigated the effects of foliar application of FA on the growth of sweet potato (Ipomoea batatas L.) in field and greenhouse conditions. Sweet potatoes grown for 30 days were sprayed with 100 mL of different concentrations of FA solutions per plant, including 0.05% (F0.05), 0.1% (F0.1) and 0.15% (F0.15), and tap water (control). Foliar application of FA increased the vine length, vine girth, leaf area per plant, leaf nutrients, tuber per plant, tuber ash, polyphenols, carotene and ascorbic acid contents of sweet potatoes. Results indicated that foliar application of FA may be a practical method for improving the yield of sweet potato in both field and greenhouse conditions
