Current conventional agricultural systems using intensive energy has to be re-vitalized by new integrated
approaches relying on renewable energy resources, which can allow farmers to stop depending on fossil
resources. The aim of the present study was to compare wheat production in dryland (low input) and irrigated
(high input) systems in terms of energy ratio, energy efficiency, benefit/cost ratio and amount of
renewable energy use. Data were collected from 50 irrigated and 50 dryland wheat growers by using a
face-to-face questionnaire in 2009. The results showed that the total energy requirement under low input
was 9354.2 MJ ha1, whereas under high input systems it was 45367.6 MJ ha1. Total energy input
consumed in both dryland and irrigated systems could be classified as direct, indirect, renewable and
non-renewable energies which average in two wheat production systems were 47%, 53%, 24% and 76%,
respectively. Energy ratios of 3.38 in dryland and 1.44 in irrigated systems were achieved. The benefit–
cost ratios were 2.56 in dryland and 1.97 in irrigated wheat production systems. Based on the results
of the present study, dry-land farming can have a significant positive effect on energy-related factors
especially in dry and semi-dry climates such as Iran.
کلید واژگان :
Cereals Energy efficiency Low-input systems Rain-fed Triticum aestivum
