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Energy input-output relationship of soybean-based cropping systems under different nutrient supply options

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Title Energy input-output relationship of soybean-based cropping systems under different nutrient supply options
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Creator K. Prajapat, A.K. Vyas, Shiva Dhar, N.K. Jain, Mohd. Hashim and G.L. Choudhary
 
Subject Cropping systems Carbon balance Carbon flux Energy use efficiency Nutrient supply options
 
Description Not Available
Aim: Increase in agricultural productivity with minimal energy utilization without any adverse impact on environment is the pre-requisite of present agricultural practices through best agronomic management of crop production. The present investigation aimed to identify the most energy efficient cropping system and nutrient supply option which exert minimal impact on environment.
Methodology: The experiment was carried out for two consecutive years at Indian Agricultural Research Institute, New Delhi for evaluation of 4 soybean-based cropping systems with 5 nutrient supply options in respect of energy parameters as well as carbon emission equivalents. The different inputs used in raising the crops and output of crops were converted into energy and carbon equivalents using standard conversion factors and used for computation of different energy and carbon efficiency indices.
Results: The soybean–potato–mungbean system recorded significantly highest system productivity in terms of soybean seed-equivalent yield (7.68 t ha-1). But soybean–chickpea–fodder sorghum system recorded highest net energy (333.9 × 103 MJ ha-1), energy efficiency (9.56), energy productivity (179 g MJ-1), energy profitability (8.6 MJ ha-1), human energy profitability (105.2) and energy intensiveness (6.76). Soybean–chickpea–fodder sorghum system maintained higher carbon output and carbon efficiency which were 22.9 and 15.6% higher over soybean–wheat system, respectively. Among the nutrient supply options, application of 50% RDF + 50% RDN through FYM accounted for highest energy output (286.1 MJ ha-1), net energy (240.3 MJ ha-1) and energy output efficiency (968 MJ ha-1 day-1) and also reduced the C flux to the atmosphere as compared to 100% RDF.
Interpretation: The cropping system followed and sources of nutrient supply had considerable impact on utilization of energy as well as carbon emission equivalents. Therefore, besides looking only upon productivity of a particular cropping system and management level, their relative energy efficiency and resultant impact on environment should also be taken into consideration for ensuring judicious use of non-renewable resources.
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Date 2019-10-15T10:14:54Z
2019-10-15T10:14:54Z
2018-01-01
 
Type Research Paper
 
Identifier Prajapat, K., Vyas, A.K., Dhar, S., Jain, N.K., Mohd. Hashim and Choudhary, G.L. 2018. Energy input-output relationship of soybean-based cropping systems under different nutrient supply options. Journal of Environmental Biology, 39 (1):93-101.
0254-8704
http://krishi.icar.gov.in/jspui/handle/123456789/23413
 
Language English
 
Relation Not Available;
 
Publisher Triveni Enterprises, Lucknow