Effect of irrigation intervals and sulphur fertilizer on growth analyses and yield of Brassica juncea

Abstract

In order to study of Effect of irrigation intervals and sulphur fertilizer on growth analyses and yield of Indian 
mustard (B. juncea var. Pusa Jagannath), a field experiment was conducted at Indian Agricultural Research 
Institute, New Delhi during crop season of 2007-2008 and 2008-2009. The experiment was carried out in split plot 
designed with three replications. The treatments consisted of three levels (no irrigation, one irrigation at 45 days 
after sowing (DAS) and two irrigations at 45 DAS and 90 DAS) of irrigation in main plots and four levels (0, 15, 30 
and 45 kg S/ha) of sulphur in sub-plots. The results showed that in both years of experimentation application of 
two irrigations significantly increased plant height and number of primary branches per plant over one 
irrigation, which resulted in significantly higher straw yield. Also application of two irrigations, being on par with 
one irrigation, significantly increased RGR and NAR over no irrigation at all the stages of plant growth in both 
the years of investigation. The increasing level of sulphur increased plant height, number of primary branches, 
yield straw and leaf area index, relative growth rate and net assimilation rate at all the stages of crop growth.