Effect of NPK on growth, nutrient absorption and organic composition of sweet potato
1983
Djazuli, M. (Balai Penelitian Tanaman Pangan, Bogor (Indonesia)) | Ismunaji, M.
A pot experiment was conducted to study the effect of NPK fertilizers on Daya 380 sweet potato variety in a greenhouse during 1981/82, using red-yellow podzolic soil from Jasinga (West Java, Indonesia). Nitrogen fertilizer increased plant dry matter weight, but high N applications significantly decreased the tuber production. Phosphate fertilizer increased both plant dry matter and tuber production. Potassium fertilizer increased tuber production, but had no effect on plant dry matter weight. Nitrogen, phosphate and potassium application increased nutrient absorption during growth. Tuber protein content was raised by N, P and K application. Tuber carbohydrate content increased with P and K but decreased with N application. Ascorbic acid content of the tuber increased only with P application. No effect of NPK fertilizers was found on tuber carotene content.
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