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001-es BibID:BIBFORM065052
035-os BibID:(WoS)000387850600011 (Scopus)84995612349
Első szerző:Halász András (agrármérnök)
Cím:Weather regulated cattle behaviour on rangeland / Halasz A., Nagy, G., Tasi J., Bajnok M., Mikone J. E.
Dátum:2016
ISSN:1589-1623 1785-0037
Megjegyzések:Cattle behaviour depends both on internal factors (breed, age, oestrus, hierarchy, body homeostasis) and external factors (air temperature, humidity, wind speed, paddock size, grass quality and quantity). In our study we present how weather conditions modify behaviour and daily walked distance. Direct observations of Hungarian grey cows and calves were carried out in Eastern Hungary on a rangeland called Hortobagy. Meteorological, spatial and behavioural data were collected using weather stations, GPS collars and ethogram recordings. Data showed a positive correlation between daily walked distance and atmospheric pressure (r=0.389, P<0.05). Animals consistently used the same daily routes and resting sites. Moreover, frequency of metabolic behaviour (grazing, rumination, drinking, defecation, and urination) depended significantly on type of weather fronts experienced on the day following the examined day (r=0.445, P<0.05). These weather fronts were classified according to the system developed by Peczely. In summary, our study suggests that Hungarian grey cattle show specific behavioural patterns during low-pressure conditions. Therefore, understanding their behavioural responses to different environmental factors may help to improve the handling techniques of extensively farmed beef cattle. As behavioural adaptation is usually driven by the neuroendocrine system, we suggest that this type of regulation could also depend on environmental changes, therefore, this relationship needs further research.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény hazai lapban
folyóiratcikk
Biometeorology
gps
Cattle
Behaviour
Atmospheric
Pressure
Serotonin
Megjelenés:Applied Ecology and Environmental Research. - 14 : 4 (2016), p. 149-158. -
További szerzők:Nagy Géza (1952-) (agrármérnök) Tasi Julianna (1956-) (agrármérnök) Bajnok Márta (1975-) (agrármérnök) Jónás Edit (1974-) (agrármérnök)
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001-es BibID:BIBFORM072890
Első szerző:Süli Ágnes (agrármérnök)
Cím:Dietary manipulation to increase the concentration of n-3 fatty acids in milk fat / Süli Ágnes, Garipoglu Ali Vaiz, Csapó János, Béri Béla, Vargáné Visi Éva, Mikóné Jónás Edit
Dátum:2018
ISSN:1589-1623 1785-0037
Megjegyzések:Linseed is an excellent source of PUFA, especially linolenic acid (18:3n-3), but it is not commonly used in dairy diet in Hungary. Aim of this study was to investigate the effect of the supplemented whole linseed on fatty acid profile of milk fat, with particular reference to health promoting components (?-linolenic acid). A total of thirty multiparous Holstein cows were used in two dairy farms to determine the effect of feeding whole linseed rich in linolenic (C18:3) fatty acids on fatty acid composition of milk fat. The experiment was conducted on two large-scale dairy farms located in Hajdú-Bihar County (referred to as farm "A" and "B"). Fifteen multiparous Holstein-Friesian (165 average days in milk) on farm A and fifteen multiparous Holstein-Friesian (200 average days in milk) on farm B were randomly allocated to treatment groups to investigate the effect of whole linseed supplementation on the composition of fatty acids of milk fat. The group on farm A and B fed TMR based maize silage without whole linseed during the control-period. In the experimental-period the cows received the same TMR on both farms, but it was supplemented with 2.60% DM of whole linseed on farm A, and 2.16% DM of whole linseed on farm B. The experimental period was four weeks in both farms. The supplementation of whole linseed had no effect (P > 0.05) on the short chain saturated fatty acid (SFA), and most of the medium chain saturated fatty acid. During the trial the oleic acid (18:1c) content in milk fat significantly increased (21.33% at the start, 24.71% after 2 weeks and 22.51% after 4 weeks on farm B, respectively). The proportion of ?-linolenic acid (18:3n-3) increased (P > 0.05) during the experimental period compared to the control period (0.23% at the start, 0.58% after 2 weeks and 0.59% after 4 weeks on farm B). The concentration of long-chain polyunsaturated fatty acids (eicosapentaenoic acid and docosapentaenoic acid) significantly increased in milk fat after 4 weeks on both farms. The n-6/n-3 ratio narrowed from 13.52:1 to 3.83:1 and 3.69:1 on farm B, respectively, but this result was not significant. This study concluded that dietary supplementation of whole linseed decreased the proportion of some SFA and increased the proportion of some MUFA and PUFA.
Tárgyszavak:Agrártudományok Állattenyésztési tudományok idegen nyelvű folyóiratközlemény hazai lapban
dairy cattle
whole linseed
milk fatty acid composition
[alpha]-linolenic acid
Megjelenés:Applied Ecology and Environmental Research 16 : 2 (2018), p. 1553-1562. -
További szerzők:Garipoglu, Ali Vaiz Csapó János (1950-) (agrármérnök) Béri Béla (1951-) (agrármérnök) Vargáné Visi Éva (1971-) (agrármérnök) Jónás Edit (1974-) (agrármérnök)
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Intézményi repozitóriumban (DEA) tárolt változat
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