Evaluation of the Energy Flow on Pear Gardens in Miandoab, West Azerbijan, Iran

  • Abdollah HASANZADEH GORTTAPEH Agricultural and Natural Resources Research Institute, West Azerbaijan, Urmia Iran;
  • Sara SAMADVAND Urmia University, West Azerbaijan, Iran
  • Esmeil ALIZADEH Agricultural and Natural Resources Research Institute, West Azerbaijan, Urmia Iran


One ways of evaluating the permanent development in agricultural regions is the use of the energy flow method. Therefore, we study the comparison of the energy balance sheet on two different cultivars of pear (‘Bartlett’ and ‘Shah Miveh’ cultivars) in the Miandoab. For the evaluation of the energy balance sheet in these gardens, all data, such as input and output, are converted to the equal values of the consumed and produced energy, by using the special formulas and indexes, after which the energy efficiency is calculated. Results showed close energy values of the input for both pear gardens cultivars, ‘Bartlett’ and ‘Shah Mivah’, equal to 13532883 and 13544883 kilocalories, respectively and the energy of the output as 19362399 and 15489919.2 kilocalories. Energy efficiency (output/input ratio) was 1.41 and 1.3 in ‘Bartlett t’ and ‘Shah Mivah’ garden cultivars respectively. The number of inputs used for pear garden cultivars' Shah Miveh’ is higher than the ones for ‘Bartlett t’ cultivars, due to the fact that Bartlett’ is more sensitive to fiber blithe and dieses. The infection causes the significant differences in the efficiency of the two above mentioned cultivars, due to Bartlett’s sensitivity, which is almost predictable from the beginning. From the relative data of the afore mentioned pear gardens cultivars in Miandoab, the most energy is used for irrigation, nitrogen fertilization and for human power which had no significant differences for any of the cultivars in regard to energy savings.