Human energy expenditure in lowland rice cultivation in Malaysia

Nawi, N. M. and Yahya, A. and Chen, G. and Bockari-Gevao, S. M. and Maraseni, T. N. (2012) Human energy expenditure in lowland rice cultivation in Malaysia. Journal of Agricultural Safety and Health, 18 (1). pp. 45-56. ISSN 1074-7583

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Abstract

A study was undertaken to evaluate the human energy consumption of various field operations involved in lowland rice cultivation in Malaysia. Based on recorded average heart rates, fertilizing was found to be the most strenuous operation,with an average heart rate of 138 beats min-1. There were no significant differences in the average heart rates of the subjects among the individual tasks within the first plowing, second plowing, and harvesting operations, with the average heart rates for these three tasks being 116, 106, and 106 beats min-1, respectively. The corresponding energy expenditures were 3.90, 3.43, and 3.35 kcal min-1. Loading the seed into the blower tank and broadcasting the seed were the most critical tasks for the seed broadcasting operation, with average heart rates of 124 and 136 beats min-1, respectively. The highest energy expenditure of 418.38 kcal ha-1 was observed for seed broadcasting,and the lowest energy expenditure of 127.96 kcal ha-1 was for second plowing. The total seasonal human energy expenditure for rice cultivation was estimated to be 5810.71 kcal ha-1, 55.7% of which was spent on pesticide spraying. Although the sample size in this study was relatively small, the results indicated that human energy expenditure per unit area (kcal ha-1) was positively linked to the average heart rate of the subjects and negatively linked to the field capacity. Thus, mechanization of certain tasks could decrease worker physical effort and fatigue and increase production.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published version deposited in accordance with the copyright policy of the publisher (ASABE). The American Society of Agricultural and Biological Engineers in turn hereby grants to the Author and, in the case of a work made for hire, his employer, a nonexclusive, royalty-free license to use, reproduce, and distribute the article, provided that each copy shall include the copyright notice appearing on the published article. .
Depositing User: Mr Nazmi Mat Nawi
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Agricultural, Civil and Environmental Engineering
Date Deposited: 04 Jul 2012 11:21
Last Modified: 03 Jul 2013 01:07
Uncontrolled Keywords: ergonomics; field capacity; field operations; heart rate; human energy expenditure, mechanization, rice cultivation
Fields of Research (FOR2008): 11 Medical and Health Sciences > 1106 Human Movement and Sports Science > 110602 Exercise Physiology
07 Agricultural and Veterinary Sciences > 0701 Agriculture, Land and Farm Management > 070107 Farming Systems Research
09 Engineering > 0999 Other Engineering > 099901 Agricultural Engineering
Socio-Economic Objective (SEO2008): B Economic Development > 82 Plant Production and Plant Primary Products > 8204 Summer Grains and Oilseeds > 820402 Rice
URI: http://eprints.usq.edu.au/id/eprint/20969

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