BALANCE SHEET OF N AND S RECYCLING AND PRODUCTIVITY OF INDIAN MUSTARD UNDER DIFFERENT NUTRIENT TREATMENTS AND PLANT GROWTH REGULATORS

R.K. DUBEY¹, S.L. MUNDRA², R.C. DHAKER³*, S.K. DUBEY^4
1Department of Agronomy, Rajasthan College of Agriculture, Maharana Pratap University of Agriculture and Technology, Udaipur, 313 001, Rajasthan, India
²Department of Agronomy, Rajasthan College of Agriculture, Maharana Pratap University of Agriculture and Technology, Udaipur, 313 001, Rajasthan, India
³Agriculture Research Officer (Agronomy) Dy. Director of Agriculture (Exten.), Udaipur, Rajasthan, India
⁴ICAR-Indian Institute of Soil and Water Conservation, Research Centre, Chhalesar, Agra 282 006, Uttar Pradesh, India
* Corresponding Author : rameshagro2011@gmail.com

Received : 15-10-2018     Accepted : 26-10-2018     Published : 30-10-2018
Volume : 10     Issue : 20       Pages : 7401 - 7405
Int J Agr Sci 10.20 (2018):7401-7405

Keywords : Brassinolide, Indole acetic acid, Indian mustard, Integrated nutrient management, Residue recycling
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Rajasthan College of Agriculture, Maharana Pratap University of Agriculture and Technology, Udaipur, 313 001, Rajasthan, India. Authors are also thankful to ICAR-Indian Institute of Soil and Water Conservation, Research Centre, Chhalesar, Agra 282 006, Uttar Pradesh, India
Author Contribution : All author equally contributed

Oilseed productivity in the country is being constrained by shrinking soil fertility, inadequate and imbalanced fertilization and climatic constraints. PGRs mitigate abiotic and biotic stress and a number of laboratory/pot culture studies confirm to a strong synergistic interaction between auxins and brassinosteroids/BR but field studies in this line are meager. Therefore, N and S dynamics mainly soil depletions, crop uptake and unaccounted losses were studied through balance sheet method under different nutrient treatments and plant growth regulators/PGRs to achieve sustained higher productivity of Indian mustard during winters of 2012 and 2013 in Udaipur region. Eight nutrient treatments i.e. 75 and 100% recommended dose of fertilizers/RDF and their combinations with 5 t farm yard manure ha-1/FYM, bio-fertilizers (Azotobacter + PSB) and FYM+ bio-fertilizers in main plots and four PGRs (water spray, BR 0.5 ppm, Indole acetic acid/IAA 50 ppm and BR 0.5 + IAA 50 ppm) in sub plots were evaluated in a split plot design replicated thrice. Results show that 100% RDF + FYM+ bio-fertilizers outperformed other nutrient treatments in pooled seed and stover yield (3231 and 13604 kg ha-1), crop N and S uptake(157.23 and 79.43 kg ha-1, respectively) and available soil N and S at crop harvest (272.53 and 25.44 kg ha-1, respectively). Among PGRs, BR + IAA registered significantly higher pooled seed and stover yield (2922 and 12379 kg ha-1) and crop N and S uptake (142.11 and 69.52 kg ha-1, respectively).

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