مقايسه كارايي انرژي مصرفي در روشهاي مختلف حاصلخيزي (شيميايي تلفيقي و ارگانيك ) خاك

Efficiency of input energy in different methods of soil fertilization.

Energy efficiency of different methods of soil fertilization in agroecosystems of fennel (Foeniculum vulgare Mil!) were investigated in a field experiment at Alborz research center, Karaj / Iran in 1996-97. The treatments include various levels of manure, used in sustainable (organic) systems, and mixture treatments of both system with comparison to the control treatment (no fertilizer and manure). The experiment carried out in a completely randomized block experimental design with three replications. The energy application for seed yield in fertilizer, Intermediate and organic systems were 10032788. 8564943 and 745728 kcal/ha, respectively. The seed yield of above three systems were 901, 1182, 947 kg/ha respectively. The applied of fertilizers increased the seed yield but decreased efficiency of energy. The increase of manure and gradual decrease of fertilizers were increased the energy efficiency.