| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1734372 | Energy | 2011 | 7 Pages |
This paper examines the energy use patterns and relationship between energy input and yield for grape production in Malayer region of Hamadan Province. Data from 50 farmers were collected using a face-to-face questionnaire method. In the surveyed vineyards, average yield and energy consumption were calculated as 18,530 kgha−1 and 45,213.66 MJha−1, respectively. Among input energy sources, fertilizers, electricity and farmyard manure contained highest energy shares with 37.25%, 19%, and 17.84%, respectively. The energy ratio and energy productivity were found to be 4.95 and 0.42 kgMJ−1.Three econometric models were developed to estimate the impact of energy inputs on yield. The results revealed that impact of chemical, fertilizer and water on yield were significant at 1% probability level. Also, indirect and non-renewable energies were found to be rather high. Sensitivity analysis indicated that among the inputs, chemical has the highest MPP value of energy inputs. RTS (returns to scale) values for grape yield was found to be 2.15; thus, there prevailed an IRS of grape for estimated model. The net return was found to be positive as 2810.56 $ha−1 for grape. The benefit-cost ratio was calculated as 2.08.
► The total energy consumption in grape production was 45,213.66 MJ and share of non-renewable energy for grape production was 61%. ► Chemical fertilizers and electricity were found the most energy consumer among all energy sources. ► Energy ratio was calculated as 4.95, indicated efficiency use of energy in the grape production. ► The impact of chemicals, water for irrigation and chemical fertilizer energy were significantly positive on yield (p < 1%). ► Among energy sources, chemicals and human labor had the highest MPP values.
