Effect of parity and stage of lactation on milk yield, composition and quality of organic sheep milk

Abstract

Effect of parity (PA), stage of lactation (SL) and interaction of PA x SL on daily milk yield (DMY), composition (contents of total solids, fat, total protein and lactose) and quality (somatic cell and bacteria counts) of organic sheep milk were evaluated using 20 ewes of East Friesian which were reared on an organic farm in Habří. Ewes were on the 2nd (n = 10) and 3rd (n = 10) lactation. During the experiment ewes were reared on permanent pasture. The milk records and samplings were carried out on average 75th, 132th and 190th day of lactation. All parameters were determined by standard methods. The PA had a significant effect only on somatic cell count (SCC). On the other hand, SL had a significant effect on daily milk yield (DMY), contents of total solids (TS), total protein (TP) and lactose (L). The SL also had a significant effect on total bacteria count (TBC), psychrotrophic bacteria count (PBC), total coliform count (TCC) and SCC. The interaction of the PA x SL had a significant effect on DMY, TS and TP contents and PBC. Positive and significant correlations were found among the SL and contents of TS and TP. Significant and positive correlation was observed between the PA and SCC, but on the other hand, significant and negative correlation was found between the SL and SCC.

Effect of temperament on milk production, somatic cell count, chemical composition and physical properties in Lacaune dairy sheep breed

“…Basic descriptive statistics of milk chemical parameters, milk production and somatic cell count in Lacaune herd (n=106) Our results suggested that temperament had great effect on milk production and lactation length. It was already reported that calmer animals tend to have higher milk production level compared to temperamental ewes (Murray et In other group, parity had no significant effect on the physico-chemical properties and somatic cell count of the milk which was in concordance with the literature reports (Králíčková et al, 2011). Results considering the composition and characteristics of Lacaune ewes milk (fat, protein and lactose contetnt, pH, electrical conductivity, somatic cell count) were related to temperament scores are presented in Table 3.…”

Is udder ultrasonography a diagnostic tool for subclinical mastitis in sheep?

“…In ewes, somatic cell counts are higher during the first few weeks of lactation and decrease at the maximum milk production (Lafi et al, 1998). Furthermore, average SCC may be affected by parity (Rota et al, 1993) as positive relationship was noticed between SCC and parity (Králíčková et al, 2012).…”

Energy‐dispersive X‐ray fluorescence spectrometry as a tool for the rapid determination of the five major minerals (Na, Mg, K, P and Ca) in skim milk powder

“…A number of factors influence the mineral composition of milk: biological characteristics of lactating cows (breed, genetics, age, stage of lactation and health; Králíčková et al .,), farming methods (management system, diet, etc. ; Malbe et al .…”