Chosen biotic factors influencing raw cow milk freezing point
The milk freezing point depression (FPD) is important physical property. FPD is influenced by milk composition especially by components with osmotic pressure activity and by other physiological factors. There is possible to indicate a foreign (extraneous) water addition into milk by FPD. This is nec...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Mendel University Press
2011-01-01
|
Series: | Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis |
Subjects: | |
Online Access: | https://acta.mendelu.cz/59/5/0065/ |
id |
doaj-bfad95a24c684b21a8b3aadab3f81a6a |
---|---|
record_format |
Article |
spelling |
doaj-bfad95a24c684b21a8b3aadab3f81a6a2020-11-24T23:08:27ZengMendel University PressActa Universitatis Agriculturae et Silviculturae Mendelianae Brunensis1211-85162464-83102011-01-01595658210.11118/actaun201159050065Chosen biotic factors influencing raw cow milk freezing pointOto Hanuš0Yunhai Zhang1Marek Bjelka2Josef Kučera3Petr Roubal4Radoslava Jedelská5AgriResearch Rapotín, Výzkumníků 267, 788 13 Vikýřovice, The Czech RepublicAnhui Agricultural University, Department of Animal Sciences, College of Animal Science and Technology, Changjiang West Road 130, 230036 Hefei, P. R. ChinaBreeders Cooperative Impuls, Bohdalec 122, 595 22 Bobrová, The Czech RepublicResearch Institute for Cattle Breeding Rapotín, Výzkumníků 267, 788 13 Vikýřovice, The Czech RepublicDairy Research Institute Ltd., Prague, Ke dvoru 12a, 160 00 Praha 6, The Czech RepublicResearch Institute for Cattle Breeding Rapotín, Výzkumníků 267, 788 13 Vikýřovice, The Czech RepublicThe milk freezing point depression (FPD) is important physical property. FPD is influenced by milk composition especially by components with osmotic pressure activity and by other physiological factors. There is possible to indicate a foreign (extraneous) water addition into milk by FPD. This is necessary to have a good estimated legislative FPD discrimination limit (FPD–L) for purpose of milk quality control. This paper was aimed at obtaining information to improve such estimation. Impacts factors as season variations, estimated state of dairy cow nutrition and some milk components and properties on milk FPD and their relations to FPD were quantified (n 11 540 – 72 607 bulk raw cow milk samples). The highest FPD was in Spring (−0.52097 ± 0.004877 °C), the lowest in Autumn (−0.52516 ± 0.005725 °C; P < 0.001). Correlation between FPD and lactose was 0.35 (P < 0.001). 12% and 5.4% of FPD variability is explainable by lactose and casein variability. Relationship between FPD and urea (U) was 0.26 (P < 0.001) in March. The worst FPD was in group with presupposed (according to milk urea and protein combination) nitrogen matter (NM) and energy (E) insufficiency (−0.51855 ± 0.007288 °C). The best FPD was in group with presupposed NM and E surplus in feeding ration (−0.52536 ± 0.004785 °C; P < 0.001). The FPD was worse in suspicion on E deficiency (on the basis of fat/crude protein ratio) as compared to presumption for balanced E nourishment of dairy herds (−0.52105 ± 0.006436 °C > −0.52244 ± 0.005367 °C; P < 0.001). Results can improve the estimation of objective FPD–L.https://acta.mendelu.cz/59/5/0065/dairy cowbulk milk samplefreezing point depressionfatproteincasein |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Oto Hanuš Yunhai Zhang Marek Bjelka Josef Kučera Petr Roubal Radoslava Jedelská |
spellingShingle |
Oto Hanuš Yunhai Zhang Marek Bjelka Josef Kučera Petr Roubal Radoslava Jedelská Chosen biotic factors influencing raw cow milk freezing point Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis dairy cow bulk milk sample freezing point depression fat protein casein |
author_facet |
Oto Hanuš Yunhai Zhang Marek Bjelka Josef Kučera Petr Roubal Radoslava Jedelská |
author_sort |
Oto Hanuš |
title |
Chosen biotic factors influencing raw cow milk freezing point |
title_short |
Chosen biotic factors influencing raw cow milk freezing point |
title_full |
Chosen biotic factors influencing raw cow milk freezing point |
title_fullStr |
Chosen biotic factors influencing raw cow milk freezing point |
title_full_unstemmed |
Chosen biotic factors influencing raw cow milk freezing point |
title_sort |
chosen biotic factors influencing raw cow milk freezing point |
publisher |
Mendel University Press |
series |
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis |
issn |
1211-8516 2464-8310 |
publishDate |
2011-01-01 |
description |
The milk freezing point depression (FPD) is important physical property. FPD is influenced by milk composition especially by components with osmotic pressure activity and by other physiological factors. There is possible to indicate a foreign (extraneous) water addition into milk by FPD. This is necessary to have a good estimated legislative FPD discrimination limit (FPD–L) for purpose of milk quality control. This paper was aimed at obtaining information to improve such estimation. Impacts factors as season variations, estimated state of dairy cow nutrition and some milk components and properties on milk FPD and their relations to FPD were quantified (n 11 540 – 72 607 bulk raw cow milk samples). The highest FPD was in Spring (−0.52097 ± 0.004877 °C), the lowest in Autumn (−0.52516 ± 0.005725 °C; P < 0.001). Correlation between FPD and lactose was 0.35 (P < 0.001). 12% and 5.4% of FPD variability is explainable by lactose and casein variability. Relationship between FPD and urea (U) was 0.26 (P < 0.001) in March. The worst FPD was in group with presupposed (according to milk urea and protein combination) nitrogen matter (NM) and energy (E) insufficiency (−0.51855 ± 0.007288 °C). The best FPD was in group with presupposed NM and E surplus in feeding ration (−0.52536 ± 0.004785 °C; P < 0.001). The FPD was worse in suspicion on E deficiency (on the basis of fat/crude protein ratio) as compared to presumption for balanced E nourishment of dairy herds (−0.52105 ± 0.006436 °C > −0.52244 ± 0.005367 °C; P < 0.001). Results can improve the estimation of objective FPD–L. |
topic |
dairy cow bulk milk sample freezing point depression fat protein casein |
url |
https://acta.mendelu.cz/59/5/0065/ |
work_keys_str_mv |
AT otohanus chosenbioticfactorsinfluencingrawcowmilkfreezingpoint AT yunhaizhang chosenbioticfactorsinfluencingrawcowmilkfreezingpoint AT marekbjelka chosenbioticfactorsinfluencingrawcowmilkfreezingpoint AT josefkucera chosenbioticfactorsinfluencingrawcowmilkfreezingpoint AT petrroubal chosenbioticfactorsinfluencingrawcowmilkfreezingpoint AT radoslavajedelska chosenbioticfactorsinfluencingrawcowmilkfreezingpoint |
_version_ |
1725614219934564352 |