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Energetic evaluation of different technologies in grassland management

100%

Rzonca J., Pozdisek J.

Zeszyty Problemowe Postępów Nauk Rolniczych

2005

tom 507

nr 2

Energetic analysis of different grassland management systems was carried out in 2003 at the Hruby Jesenik locality. The study aimed at evaluating the energy inputs and outputs (energy balance) on grassland of different utilization intensity. Four levels of utilization: extensive, low intensive, medium intensive and intensive, were considered. Applied nutrition and fertilization were as follows: A - PK 30 : 60 kg·ha⁻¹, B - NPK 90 : 30 : 60 kg·ha⁻¹, C - NPK 180 : 30 : 60 kg·ha⁻¹. In case of energy inputs the following data were recorded: used industrial and organic fertilizers in pure NPK nutrients (kg·ha⁻¹), the energy of engines (GJ·ha⁻¹), fuel consumption and the amount of human labour (man-hrs) per ha. The energy outputs included the biomass yield (t·ha⁻¹). On that basis the energy balance was made and energy gain and energy efficiency were calculated. Energy inputs ranged from 4.94 to 22.70 GJ·ha⁻¹. The highest energy requirement per production unit was noted at intensive and medium intensive and utilization. The highest energy gain was obtained at low intensive (x=128.21 GJ·ha⁻¹) and medium (123.18 GJ·ha⁻¹) utilization. At extensive utilization the average energy gain 112.18 GJ·ha⁻¹ was observed, while the lowest was achieved at intensively utilized vegetation (x = 102.09 GJ·ha⁻¹). From the viewpoint of energy gain and energy input intensity the utilization of grassland consisted in 3 or 2 cuts per year appeared to be most applicable.

Energetic evaluation of different technologies in grassland management

100%

Rzonca J., Pozdisek J.

Zeszyty Problemowe Postępów Nauk Rolniczych

2005

tom 507

nr 1

Energetic evaluation of postharvest corn mass for heating purposes

84%

Niedziolka I., Szymanek M., Zuchniarz A.

Teka Komisji Motoryzacji i Energetyki Rolnictwa

2006

tom 06A

Ograniczanie wyników

2 Zeszyty Problemowe Postępów Nauk Rolniczych

1 Teka Komisji Motoryzacji i Energetyki Rolnictwa

2 Pozdisek J.

2 Rzonca J.

1 Niedziolka I.

1 Szymanek M.

1 Zuchniarz A.

1 2006

2 2005

Wyniki wyszukiwania

Energetic evaluation of different technologies in grassland management

Energetic evaluation of different technologies in grassland management

Energetic evaluation of postharvest corn mass for heating purposes