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vol. 15, nr. 1 (2010)
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Energy efficiency of crop production in a four-field rotation as affected by reduced tillage systems and fertilization levels
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Karol Bujak, Mariusz Frant, Elżbieta Harasim
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Department of Tillage and Plant Cultivation, University of Life Sciences ul. Akademicka 13, 20-950 Lublin |
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vol. 15 (2010), nr. 1,
pp. 23-31
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abstract:
In the years 2003-2006, three tillage systems (conventional, partially reduced and reduced) and two fertilization levels (167.5 kg NPK/ha/year and increased by 50%) were compared for their effect on energy efficiency of crop production in the second cycle of a four-field rotation (potatoes++ – spring wheat – field peas – winter wheat). Energy efficiency was based on calculating rolling costs. Cereals, winter wheat in particular, and field peas gave the highest while potatoes the lowest energy efficiency values. Reduced tillage in cereals caused a decrease of 3-18% in the energy efficiency index. Cereals and peas responded in a similar manner to increased NPK fertilization. Conversely, reduced tillage applied to spring wheat and fully reduced tillage used for peas were more energy efficient than conventional tillage.
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keywords:
crop rotation, soil tillage, level of fertilization, energy efficiency
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original in:
Polish
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