Life cycle of energy-economic analysis for different cultivation scenarios of paddy production (Case study: Khuzestan Province)
محمد غلامی پرشکوهی
1
(دانشیار گروه آموزشی مکانیک بیوسیستم دانشگاه آزاد تاکستان)
Heidar Molaee Jafrodi
2
(PhD student of Department of Biosystem Engineering, Takestan Branch, Islamic Azad University, Takestan, Iran)
Hamed Afshari
3
(Assistant Professor of Department of Food Science and Engineering, Faculty of Civil and Earth Resources Engineering, Central Tehran Branch, Islamic Azad University, Tehran, Iran)
Davood Mohammad Zamani
4
(Assistant Professor of Department of Biosystem Engineering, Takestan Branch, Islamic Azad University, Takestan, Iran)
Keywords: paddy, Rice production, Energy use indices, Benefit to cost ratio,
Abstract :
In this study, energy and economic analysis of paddy production in Khuzestan province of Iran were studied. Paddy production in this province was analyzed under three scenarios of multiple cultivation system including (Paddy-Transplanting System) PTS, (Paddy Direct Seeding Flooding System) PDSFS and (Paddy-Upland Cultivation System) PUCS. The highest total input (87993.14 MJ ha-1) and output (105400 MJ ha-1) energies were related to PTS. Diesel fuel and nitrogen fertilizer had the uppermost energy use shares. Depending on the type of cultivation in PUCS, human labor has a large share of energy. Estimation of the energy ratio of PUCS method (1.34) indicates that the amount of output energy is much higher than the input energy. Productivity energy index also showed that there is no significant difference between the three methods in terms of amount of paddy relative to input energy. The specific energy of PTS method (14.19 MJ kg-1) indicates large amounts of input energy relative to the amount of paddy produced. Based on the high revenue and low cost, the benefit to cost ratio at the expense of PTS method is significant. The productivity of the PUCS method was reported to be 212.65 kg $−1 due to the high production of paddy compared to the lowest costs.