Productivity and profitability of Indian mustard (Brassica juncea L.) genotypes as influenced by N and S fertilization under irrigated conditions of eastern Uttar Pradesh

Abstract

A field experiment was conducted with combinations of three nitrogen levels (90, 120 and 150 kg
ha-1) and two genotypes of Indian mustard (Pusa Bold and RH- 749) as main plot treatments and three sulphur levels (0,
25 and 50 kg ha-1) as sub-plot treatments and replicated thricely in split-plot design during Rabi 2016-17. Yield attributes
and yield parameters viz. siliquae on main shoot, siliquae plant-1, siliqua length, seeds siliqua-1, 1000-seed weight, seed
yield and stover yield and quality parameters such as seed protein content, protein and oil yield were positively
correlated with increasing rates of N and S up to 150 and 50 kg ha-1, respectively. Similar trend was also observed in yield
and quality of mustard genotypes. However, decrease in seed oil content was noticed with higher dose of N. Application
of 120 and 150 kg N ha-1 produced 6.0% and 14.1% higher seed and 8.7% and 14.1% higher stover yield, respectively over
90 kg N ha-1. Similarly, application of 50 kg S ha-1 recorded 1.2% and 7.2% higher seed yield over 25 kg S ha-1 and control,
respectively. Between the two genotypes, ‘RH-749’ produced distinctly higher seed (16.9 q ha-1) and stover (57.8 q ha 1)
yield over ‘Pusa Bold’. The maximum net returns and B:C ratio were obtained with ‘RH-749’ fertilized with 150 kg N and
25 kg S ha-1