M. MIHOV1, G. ANTONOVA1 and K. MIHOV2
1 Maritsa Vegetable Crops Research Institute, BG – 4003 Plovdiv, Bulgaria
2 Agricultural University, BG – 4000 Plovdiv, Bulgaria
MIHOV, M., G. ANTONOVA and K. MIHOV, 2013. Energy assessment of new broccoli variety. Bulg. J. Agric. Sci., 19: 1056-1060
The energy budgets in crop production could be used as a key indicator that helps to assess the productivity and profitability that are dependent on energy use. Therefore, it is essential to conduct an energy assessment of crop varieties, as they are a major component of production. Tests were carried out in three consecutive years (2010-2012) under standard technology for late field production in order to determine the energy costs involved in the production of two varieties of broccoli as well as to assess the energy parameters. Standard fertilization and plant protection with pesticide chemical origin were applied. The total energy consumption in Coronado F1 and IZK Iskra varieties productions was 3570.31 MJ.da-1 and 3511.68 MJ.da-1, respectively. Variety IZK Iskra is more energy efficient because of reduced energy costs for diesel oil, machinery, some insecticides, human power and higher energy output. The higher energy output in IZK Iskra variety leads to a 22.50% increase in energy productivity and energy use efficiency in comparison with Coronado F1 variety. The shares of non-renewable energy for Coronado F1 and IZK Iskra varieties production were almost equal and were up to 89.30%. There is a heavy reliance on the use of chemical fertilizers, diesel oil and machinery. Consumption of these non-renewable energies can be reduced using bioproducts for fertilization and plant protection, and biofuel. It is essential for the creation and use of modern energy efficient varieties and hybrids.