Effect of different nutrient levels on growth, yield attributes and uptake of hybrid and inbred rice varieties
A field experiment was conducted at the Central Research Station, Orissa University of Agriculture and Technology, Bhubaneswar during season of 2013-14. Testing variables consisted of four varieties (Hybrids DRRH 2, BIO 795, BIO 799 and HYV Pratiskhya), and two sources of fertilizer of NPK through inorganic source and organic source was FYM. Two micronutrients Zn, S and B through ZnSO4 and Borax were tested in different combinations either on soil or as foliar application both 25 kg/ha and 10 kg /ha. Plants of rice hybrid DRRH 2 grew rapidly at all the stages of growth and obtained maximum grain and straw yield than the ruling cultivar Pratiskhya and other hybrids BIO 795 and BIO 799. Combined application of FYM, NPK, ZnSO4 and Borax accumulated more dry matter, obtained more number of panicle/m2, longer panicles, higher thousand grain weight, maximum grain yield, straw yield and also the highest uptake of N, P, K as well as S, Zn and B over other nutrient management practices. Hybrid rice DRRH 2 had the highest uptake of N, P, K and S, Zn, B both in the grain and straw and also the total uptake followed by BIO 795, BIO 799 and HYV Pratiskhya.