Revista y Edición

Volumen 73 (2022): Edición 1 (March 2022)

Volumen 72 (2021): Edición 3 (September 2021)

Volumen 72 (2021): Edición 2 (June 2021)

Volumen 72 (2021): Edición 1 (March 2021)

Volumen 71 (2020): Edición 4 (December 2020)

Volumen 71 (2020): Edición 3 (September 2020)

Volumen 71 (2020): Edición 2 (June 2020)

Volumen 71 (2020): Edición 1 (March 2020)

Volumen 70 (2019): Edición 4 (December 2019)

Volumen 70 (2019): Edición 3 (December 2019)
Special Edición: with invited papers from the 47th International Symposium „Actual tasks on Agricultural Engineering“ (ATAE), 5th – 7th March 2019, Opatija, Croatia, http://atae.agr.hr/, Editor: Prof. Andreas Gronauer

Volumen 70 (2019): Edición 2 (June 2019)

Volumen 70 (2019): Edición 1 (March 2019)

Volumen 69 (2018): Edición 4 (December 2018)

Volumen 69 (2018): Edición 3 (September 2018)

Volumen 69 (2018): Edición 2 (June 2018)

Volumen 69 (2018): Edición 1 (March 2018)

Volumen 68 (2017): Edición 4 (December 2017)

Volumen 68 (2017): Edición 3 (September 2017)

Volumen 68 (2017): Edición 2 (June 2017)

Volumen 68 (2017): Edición 1 (March 2017)

Volumen 67 (2016): Edición 4 (December 2016)

Volumen 67 (2016): Edición 3 (September 2016)

Volumen 67 (2016): Edición 2 (June 2016)

Volumen 67 (2016): Edición 1 (March 2016)

Detalles de la revista
Formato
Revista
eISSN
2719-5430
Publicado por primera vez
30 Mar 2016
Periodo de publicación
4 veces al año
Idiomas
Inglés

Buscar

Volumen 72 (2021): Edición 1 (March 2021)

Detalles de la revista
Formato
Revista
eISSN
2719-5430
Publicado por primera vez
30 Mar 2016
Periodo de publicación
4 veces al año
Idiomas
Inglés

Buscar

5 Artículos

Research Article

Acceso abierto

Effects of phytogenic substances on growth and biofilm formation of Escherichia coli and Salmonella field isolates

Publicado en línea: 18 Sep 2021
Páginas: 1 - 8

Resumen

Abstract

The aim of this study was to investigate the effects of garlic oil, cinnamaldehyde, carvacrol, thymol, and thyme oil on growth and biofilm formation of Escherichia coli and Salmonella serotypes, including field isolates from livestock animals. Minimum inhibitory concentrations (MIC) were determined using broth micro-dilution method. Biofilm biomass was assessed by measuring the attached biomass with microtiter plate assay and crystal violet (CV) staining. The strongest antimicrobial effects on E. coli serotypes were observed for thymol at 150 ppm, followed by carvacrol and cinnamaldehyde at 300 ppm and thyme oil at 600 ppm. Similar results were obtained with Salmonella serotypes except for carvacrol (MIC value at 150 ppm). Garlic oil showed no growth inhibition on serotypes of E. coli and Salmonella up to 10000 ppm. Cinnamaldehyde proved to be the most effective substance in reducing E. coli CV-biofilm formation at sub-MIC level with a threshold concentration of 5 ppm, followed by carvacrol, thymol, and thyme oil at 40 ppm and garlic oil at 10000 ppm. CV-biofilm formation of Salmonella serotypes at sub-MIC level was clearly reduced with 40 ppm cinnamaldehyde and 80 ppm carvacrol, thymol, and thyme oil. No reduction of CV-biofilm formation was observed with garlic oil. The present study demonstrates a strong antibacterial activity of cinnamaldehyde, carvacrol, thymol, and thyme oil. Similar response of field isolates and type strains to these phytogenics suggests a general effect within the bacterial species tested. All four substances were also able to reduce CV-biofilm formation at sub-MIC level. Investigating phytogenics with bacterial field isolates contributes to the development of feed additives as alternatives to antibiotics in animal feed to increase productivity and animal welfare in modern livestock production.

Palabras clave

  • Phytogenics
  • antimicrobials
  • biofilm
  • field isolates

Schlagwörter

  • Phytogene Substanzen
  • Biofilm
  • Feldisolate
Acceso abierto

Growth performance and survival rates of Nile tilapia (Oreochromis niloticus L.) reared on diets containing Black soldier fly (Hermetia illucens L.) larvae meal

Publicado en línea: 18 Sep 2021
Páginas: 9 - 19

Resumen

Abstract

A 72-day feeding trial was conducted at Sagana fish farm to assess the effects of substitution of fish meal (FM) with black soldier fly larvae meal (BSFLM) on the growth performance and survival rates of Nile tilapia. Four test diets were formulated and substitution of FM by BSFLM made at 0%, 33%, 67% and 100%. 240 male Nile tilapia (52.3 ± 0.29 g) were divided into 4 groups (4 replicates) each and were placed in 16 hapa nets (15 fish/hapa), mounted in an 800 m2 earthen pond. Fish were fed twice per day at 5% of the body weight. Sampling of the fish was done biweekly; mortalities were recorded daily while the physico-chemical parameters were monitored weekly. The growth performance and survival rates of the Nile tilapia were not significantly different (p > 0.05) between treatments. In conclusion, the present study indicates that full fat BSFLM can replace up to 100% of the FM without negative effects on the growth performance and survival rates of Nile tilapia, although the slight trend towards reduced growth for the 100% substitution diet points at the need for future studies on increasing the nutritional value of BSFLM, for example, by further processing.

Palabras clave

  • Fish meal
  • insect meal
  • alternative protein
  • defatting
  • nutrient

Schlagwörter

  • Fischmehl
  • Insektenmehl
  • alternative Proteinquelle
  • entfetten
  • Nährstoffe
Acceso abierto

Arbeitszeitbedarf von aktuellen Gruppenhaltungsverfahren des Wartebereichs in konventioneller Zuchtsauenhaltung in Österreich

Publicado en línea: 18 Sep 2021
Páginas: 21 - 32

Resumen

Palabras clave

  • breeding sow
  • keeping system
  • working time requirement
  • waiting room
  • feeding bay
  • feeding station

Schlagwörter

  • Zuchtsauenhaltung
  • Arbeitszeitbedarf
  • Wartestall
  • Fressliegebucht
  • Abrufstation
Acceso abierto

Derivation of the thermal soil functions by grain size and pore size distribution as a basis for in situ predictions of the soil heat balance

Publicado en línea: 18 Sep 2021
Páginas: 33 - 43

Resumen

Palabras clave

  • Soil texture
  • pore size distribution
  • modelling
  • thermal conductivity
  • thermal diffusivity
  • heat capacity

Schlagwörter

  • Bodenarten
  • Porengrößenverteilung
  • Modellierung
  • Wärmeleitfähigkeit
  • Temperaturleitfähigkeit
  • Wärmekapazität
Acceso abierto

Multidisciplinary studies on sustainable nitrogen fertilisation considering the potential of satellite-based precision agriculture

Publicado en línea: 18 Sep 2021
Páginas: 45 - 56

Resumen

Palabras clave

  • remote sensing
  • nitrogen fertilisation
  • field experiments
  • winter wheat
  • choice experiment
  • application maps

Schlagwörter

  • Fernerkundung
  • Stickstoffdüngung
  • Feldversuche
  • Winterweizen
  • Choice Experiment
  • Applikationskarten
5 Artículos

Research Article

Acceso abierto

Effects of phytogenic substances on growth and biofilm formation of Escherichia coli and Salmonella field isolates

Publicado en línea: 18 Sep 2021
Páginas: 1 - 8

Resumen

Abstract

The aim of this study was to investigate the effects of garlic oil, cinnamaldehyde, carvacrol, thymol, and thyme oil on growth and biofilm formation of Escherichia coli and Salmonella serotypes, including field isolates from livestock animals. Minimum inhibitory concentrations (MIC) were determined using broth micro-dilution method. Biofilm biomass was assessed by measuring the attached biomass with microtiter plate assay and crystal violet (CV) staining. The strongest antimicrobial effects on E. coli serotypes were observed for thymol at 150 ppm, followed by carvacrol and cinnamaldehyde at 300 ppm and thyme oil at 600 ppm. Similar results were obtained with Salmonella serotypes except for carvacrol (MIC value at 150 ppm). Garlic oil showed no growth inhibition on serotypes of E. coli and Salmonella up to 10000 ppm. Cinnamaldehyde proved to be the most effective substance in reducing E. coli CV-biofilm formation at sub-MIC level with a threshold concentration of 5 ppm, followed by carvacrol, thymol, and thyme oil at 40 ppm and garlic oil at 10000 ppm. CV-biofilm formation of Salmonella serotypes at sub-MIC level was clearly reduced with 40 ppm cinnamaldehyde and 80 ppm carvacrol, thymol, and thyme oil. No reduction of CV-biofilm formation was observed with garlic oil. The present study demonstrates a strong antibacterial activity of cinnamaldehyde, carvacrol, thymol, and thyme oil. Similar response of field isolates and type strains to these phytogenics suggests a general effect within the bacterial species tested. All four substances were also able to reduce CV-biofilm formation at sub-MIC level. Investigating phytogenics with bacterial field isolates contributes to the development of feed additives as alternatives to antibiotics in animal feed to increase productivity and animal welfare in modern livestock production.

Palabras clave

  • Phytogenics
  • antimicrobials
  • biofilm
  • field isolates

Schlagwörter

  • Phytogene Substanzen
  • Biofilm
  • Feldisolate
Acceso abierto

Growth performance and survival rates of Nile tilapia (Oreochromis niloticus L.) reared on diets containing Black soldier fly (Hermetia illucens L.) larvae meal

Publicado en línea: 18 Sep 2021
Páginas: 9 - 19

Resumen

Abstract

A 72-day feeding trial was conducted at Sagana fish farm to assess the effects of substitution of fish meal (FM) with black soldier fly larvae meal (BSFLM) on the growth performance and survival rates of Nile tilapia. Four test diets were formulated and substitution of FM by BSFLM made at 0%, 33%, 67% and 100%. 240 male Nile tilapia (52.3 ± 0.29 g) were divided into 4 groups (4 replicates) each and were placed in 16 hapa nets (15 fish/hapa), mounted in an 800 m2 earthen pond. Fish were fed twice per day at 5% of the body weight. Sampling of the fish was done biweekly; mortalities were recorded daily while the physico-chemical parameters were monitored weekly. The growth performance and survival rates of the Nile tilapia were not significantly different (p > 0.05) between treatments. In conclusion, the present study indicates that full fat BSFLM can replace up to 100% of the FM without negative effects on the growth performance and survival rates of Nile tilapia, although the slight trend towards reduced growth for the 100% substitution diet points at the need for future studies on increasing the nutritional value of BSFLM, for example, by further processing.

Palabras clave

  • Fish meal
  • insect meal
  • alternative protein
  • defatting
  • nutrient

Schlagwörter

  • Fischmehl
  • Insektenmehl
  • alternative Proteinquelle
  • entfetten
  • Nährstoffe
Acceso abierto

Arbeitszeitbedarf von aktuellen Gruppenhaltungsverfahren des Wartebereichs in konventioneller Zuchtsauenhaltung in Österreich

Publicado en línea: 18 Sep 2021
Páginas: 21 - 32

Resumen

Palabras clave

  • breeding sow
  • keeping system
  • working time requirement
  • waiting room
  • feeding bay
  • feeding station

Schlagwörter

  • Zuchtsauenhaltung
  • Arbeitszeitbedarf
  • Wartestall
  • Fressliegebucht
  • Abrufstation
Acceso abierto

Derivation of the thermal soil functions by grain size and pore size distribution as a basis for in situ predictions of the soil heat balance

Publicado en línea: 18 Sep 2021
Páginas: 33 - 43

Resumen

Palabras clave

  • Soil texture
  • pore size distribution
  • modelling
  • thermal conductivity
  • thermal diffusivity
  • heat capacity

Schlagwörter

  • Bodenarten
  • Porengrößenverteilung
  • Modellierung
  • Wärmeleitfähigkeit
  • Temperaturleitfähigkeit
  • Wärmekapazität
Acceso abierto

Multidisciplinary studies on sustainable nitrogen fertilisation considering the potential of satellite-based precision agriculture

Publicado en línea: 18 Sep 2021
Páginas: 45 - 56

Resumen

Palabras clave

  • remote sensing
  • nitrogen fertilisation
  • field experiments
  • winter wheat
  • choice experiment
  • application maps

Schlagwörter

  • Fernerkundung
  • Stickstoffdüngung
  • Feldversuche
  • Winterweizen
  • Choice Experiment
  • Applikationskarten

Planifique su conferencia remota con Sciendo