Vol. 11, Issue 12 (2022)

Author(s):
Sheru Kumar, VN Mishra, TD Sahu, C Chandrakar and Anjali Patel

Abstract:
Nutrient omission trial was conducted at IGKV GRS technical farm, Department of Soil Science and Agricultural Chemistry, IGKV, Raipur (Chhattisgarh) during Kharif, 2017 on rice crop in Inceptisol and Vertisol. Trials were framed as pot culture in Completely Randomized Design where eleven treatments were replicated trice. Results revealed that maximum number of effective tillers pot^-1, filled grain panicle^-1, and highest thousand grain weight was observed in the treatment which was supplied with all the nutrients in both Vertisol and Inceptisol. Lowest values for the aforesaid parameters were found in the treatment where nitrogen was omitted. Omission of N, P and S in both the soil types caused significant reductions in grain and straw yields of rice. Grain and straw yields in the treatment receiving all the nutrients (66.86 and 78.08 g pot^-1, respectively in Inceptisol and 62.62 and 75.75 g pot^-1, respectively in Vertisol) were significantly higher than the yields with omission of N, P and S (36.45, 40.72 and 52.86 g pot^-1 respectively and 46.67, 47.53 and 63.13 g pot^-1 respectively in Inceptisol and 37.91 and 41.56, 57.10 and 46.32, 48.03 and 64.79 g/pot respectively in Vertisol). Grain yield reductions of rice were found more with omission of N (45.48% in Inceptisol and 39.46% in Vertisol) followed by P and S omission. Nutrient uptake by rice was significantly reduced with omission of N, P and S in both the soil types. On the basis of nutrient omission pot trial the identified yield limiting nutrients in Inceptisol and Vertisol were in the order of N > P > S.