Zeszyty czasopisma

Tom 73 (2022): Zeszyt 1 (March 2022)

Tom 72 (2021): Zeszyt 3 (September 2021)

Tom 72 (2021): Zeszyt 2 (June 2021)

Tom 72 (2021): Zeszyt 1 (March 2021)

Tom 71 (2020): Zeszyt 4 (December 2020)

Tom 71 (2020): Zeszyt 3 (September 2020)

Tom 71 (2020): Zeszyt 2 (June 2020)

Tom 71 (2020): Zeszyt 1 (March 2020)

Tom 70 (2019): Zeszyt 4 (December 2019)

Tom 70 (2019): Zeszyt 3 (December 2019)
Special Zeszyt: 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

Tom 70 (2019): Zeszyt 2 (June 2019)

Tom 70 (2019): Zeszyt 1 (March 2019)

Tom 69 (2018): Zeszyt 4 (December 2018)

Tom 69 (2018): Zeszyt 3 (September 2018)

Tom 69 (2018): Zeszyt 2 (June 2018)

Tom 69 (2018): Zeszyt 1 (March 2018)

Tom 68 (2017): Zeszyt 4 (December 2017)

Tom 68 (2017): Zeszyt 3 (September 2017)

Tom 68 (2017): Zeszyt 2 (June 2017)

Tom 68 (2017): Zeszyt 1 (March 2017)

Tom 67 (2016): Zeszyt 4 (December 2016)

Tom 67 (2016): Zeszyt 3 (September 2016)

Tom 67 (2016): Zeszyt 2 (June 2016)

Tom 67 (2016): Zeszyt 1 (March 2016)

Informacje o czasopiśmie
Format
Czasopismo
eISSN
2719-5430
Pierwsze wydanie
30 Mar 2016
Częstotliwość wydawania
4 razy w roku
Języki
Angielski

Wyszukiwanie

Tom 72 (2021): Zeszyt 1 (March 2021)

Informacje o czasopiśmie
Format
Czasopismo
eISSN
2719-5430
Pierwsze wydanie
30 Mar 2016
Częstotliwość wydawania
4 razy w roku
Języki
Angielski

Wyszukiwanie

5 Artykułów

Research Article

Otwarty dostęp

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

Data publikacji: 18 Sep 2021
Zakres stron: 1 - 8

Abstrakt

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.

Słowa kluczowe

  • Phytogenics
  • antimicrobials
  • biofilm
  • field isolates

Schlagwörter

  • Phytogene Substanzen
  • Biofilm
  • Feldisolate
Otwarty dostęp

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

Data publikacji: 18 Sep 2021
Zakres stron: 9 - 19

Abstrakt

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.

Słowa kluczowe

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

Schlagwörter

  • Fischmehl
  • Insektenmehl
  • alternative Proteinquelle
  • entfetten
  • Nährstoffe
Otwarty dostęp

Arbeitszeitbedarf von aktuellen Gruppenhaltungsverfahren des Wartebereichs in konventioneller Zuchtsauenhaltung in Österreich

Data publikacji: 18 Sep 2021
Zakres stron: 21 - 32

Abstrakt

Słowa kluczowe

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

Schlagwörter

  • Zuchtsauenhaltung
  • Arbeitszeitbedarf
  • Wartestall
  • Fressliegebucht
  • Abrufstation
Otwarty dostęp

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

Data publikacji: 18 Sep 2021
Zakres stron: 33 - 43

Abstrakt

Słowa kluczowe

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

Schlagwörter

  • Bodenarten
  • Porengrößenverteilung
  • Modellierung
  • Wärmeleitfähigkeit
  • Temperaturleitfähigkeit
  • Wärmekapazität
Otwarty dostęp

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

Data publikacji: 18 Sep 2021
Zakres stron: 45 - 56

Abstrakt

Słowa kluczowe

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

Schlagwörter

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

Research Article

Otwarty dostęp

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

Data publikacji: 18 Sep 2021
Zakres stron: 1 - 8

Abstrakt

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.

Słowa kluczowe

  • Phytogenics
  • antimicrobials
  • biofilm
  • field isolates

Schlagwörter

  • Phytogene Substanzen
  • Biofilm
  • Feldisolate
Otwarty dostęp

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

Data publikacji: 18 Sep 2021
Zakres stron: 9 - 19

Abstrakt

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.

Słowa kluczowe

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

Schlagwörter

  • Fischmehl
  • Insektenmehl
  • alternative Proteinquelle
  • entfetten
  • Nährstoffe
Otwarty dostęp

Arbeitszeitbedarf von aktuellen Gruppenhaltungsverfahren des Wartebereichs in konventioneller Zuchtsauenhaltung in Österreich

Data publikacji: 18 Sep 2021
Zakres stron: 21 - 32

Abstrakt

Słowa kluczowe

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

Schlagwörter

  • Zuchtsauenhaltung
  • Arbeitszeitbedarf
  • Wartestall
  • Fressliegebucht
  • Abrufstation
Otwarty dostęp

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

Data publikacji: 18 Sep 2021
Zakres stron: 33 - 43

Abstrakt

Słowa kluczowe

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

Schlagwörter

  • Bodenarten
  • Porengrößenverteilung
  • Modellierung
  • Wärmeleitfähigkeit
  • Temperaturleitfähigkeit
  • Wärmekapazität
Otwarty dostęp

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

Data publikacji: 18 Sep 2021
Zakres stron: 45 - 56

Abstrakt

Słowa kluczowe

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

Schlagwörter

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

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