Productivity, Profitability and Greenhouse Gas Emission from Rice-Wheat Cropping System under Different Tillage and Nitrogen Management Practices

DOI: 10.18805/IJARe.A-5325    | Article Id: A-5325 | Page : 285-292
Citation :- Productivity, Profitability and Greenhouse Gas Emission from Rice-Wheat Cropping System under Different Tillage and Nitrogen Management Practices.Indian Journal Of Agricultural Research.2020.(54):285-292
Priyanka Chaudhuary, Suborna Roy Chudhury, Anupam Das, Jajati Mandal, Mainak Ghosh, Shivsankar Acharya and Fozia Homa
  subornabau@gmail.com
Address : Department of Agronomy, Bihar Agricultural University, Sabour-813 210, Bhagalpur, Bihar, India. 
Submitted Date : 29-06-2019
Accepted Date : 16-10-2019

Abstract

A field investigation was carried out at experimental farm of Bihar Agricultural University, Sabour, Bhagalpur, India. The treatments consisted of two tillage practices viz. zero and conventional tillage as main plot and four nutrient management viz.100% inorganic fertilization, SPAD based nitrogen management, 25% of N supplement with vermicompost and split application nitrogen as sub plot. The highest rice equivalent yield (92.1 q ha-1), system productivity (25.23 kg ha-1 day-1) and B:C ratio (1.67),was recorded under zero tillage treatment as compare to conventional treatment. Further, rice equivalent yield (91.9 q ha-1), system productivity (25.18 kg ha-1 day-1) and B:C ratio (1.60), was maximum under split application of nitrogenous fertilizer. Minimum amount of total seasonal methane (48.89 kg ha-1 in kharif and 6.25 kg ha-1 in rabi), carbon dioxide (38.26 kg ha-1 in kharif and 157.03 kg ha-1 in rabi) and nitrous oxide (1.60 kg ha-1 in kharif and 21.67 kg ha-1 in rabi) emission was obtained from zero tilled plots and  splited top dressing of nitrogenous fertilization emitted lowered methane (55.44 kg ha-1 in kharif and 5.52 kg ha-1 in rabi), carbon dioxide (40.39 kg ha-1 in kharif and 147.52 kg ha-1 in rabi) and nitrous oxide (1.61 kg ha-1 in kharif and 19.35 kg ha-1 in rabi). Zero tillage with split application of nitrogenous fertilizer could be an environmentally viable, productive and economically profitable option.

Keywords

Global warming potential Greenhouse gas intensity Nitrogen management Rice-wheat system Tillage practices

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