A. Capistrak et al., MILK-PRODUCTION AND COMPOSITION IN EWES O F THE IMPROVED WALLACHIAN BREED DURING MILKING PERIOD, Zivocisna vyroba, 40(4), 1995, pp. 187-190
Production of milk, fat, proteins, lactose, dry matter, utilizable dry
matter and solids-not-fat (SNF) was evaluated in 177 lambing ewes of
the Improved Wallachian breed (IW) in the course of 145-day milking pe
riod in 1993. Milking started on 10th April after lamb weaning and ter
minated on 2nd September. There were five control recordings of milk i
n the milking period. Individual production of milk was determined by
the methodology of milk records (MR) which is in keeping with internat
ional rules of milk records (Barillet et al., 1992). Total milk output
and output of milk components were calculated by CDM (centering data
method). Out of the total number of lambing ewes, 48 ewes were in the
first, 35 in the second, 38 in the third, 18 in the fourth, 24 in the
fifth and 14 in the sixth lactation. The ewes were milked by hand afte
r lamb weaning, twice a day (in the morning and in the evening) after
the first and fifth weaning, three times a day (morning, noon, evening
) after the other weanings. Milk samples were taken at morning milking
and they were analyzed by an infrared analyzer of Multispec type for
fat, protein and lactose content. Using the determined milk components
, the content of dry matter and solids-not-fat (SNF) was calculated. P
roduction of utilizable dry matter was calculated as a sum of fat and
protein production. STATGRAPHIC software was used for statistical proc
essing of data, and computation of F-test values and correlation coeff
icients. One-factor analysis of variance was used to evaluate the effe
ct of lactation number on milk production and productive indicators. T
ab. I shows the values of productive indicators. The average output of
milk per milking period was 95.3 l, 6.4 kg of fat, 4.9 kg of proteins
, 4.7 kg of lactose, 16.8 kg of dry matter, 11.3 kg of utilizable dry
matter and 10.4 kg SNF. There are large differences in productive indi
cators between the lambing ewes, which can be profited from in further
breeding aimed at an increase in milk performance. The average daily
milk production during the milking period was 657.3 mi over the whole
period, with the content of fat 6.7%, proteins 5.1%, lactose 4.9%, dry
matter 17.7% and SNF 10.9% (Tab. II). The lambing ewes in the third l
actation (Tab. III) had the significantly highest output of milk, prot
eins, lactose, dry matter and SNF (P < 0.05 and/or P < 0.001). Tab. IV
shows phenotype correlations between the productive indicators and be
tween the contents of milk components. A very close relationship (P <
0.001) was determined between total milk output per milking period and
output of fat, protein, lactose and utilizable dry matter (r = 0.94-0
.99). The relationships between total milk output and average contents
of main milk components were not mostly close, but they were negative
(r < 0.3).