Vol. 19 No. 1
Study on effect of various levels of nitrogen on growth, yield and quality of sweet potato varieties [Ipomoea batatas (L) Lam.]
Author(s): J. SURESH KUMAR, N. NIWAS, S. JOSE AND S. SUNITHA
Abstract: Two field experiments were conducted at CTCRI (Central Tuber Crops Research Institute) Sreekariyam, Thiruvananthapuram, to study the effect of different levels of nitrogen on growth, yield and quality of sweet potato varieties during rabi 2020 and 2021. The experiment was laid out in Factorial Randomized Block Design with ten treatments and three replications. The experiment consisted of five levels of nitrogen (0, 25, 50, 100 and 125%) on two varieties of sweet potato (SreeArun and Sree Kanaka). The results revealed that application of super optimal (125% @ 62.5 kg ha-1) level of nitrogen on two varieties of sweet potato had recorded significantly higher growth and quality parameters, and was at par with optimal dose of nitrogen (50 kg ha-1). Application of nitrogen @ 62.5 kg ha-1 showed highest tuber yield (15.97 t ha-1). Significantly higher quality parameters for crude protein (5.91%) and crude fibre (2.49%) were observed when super optimal level of nitrogen was given.
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