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1

Wpływ pory roku i sposobu krycia na wskaźniki rozpłodu królików rasy Rex

100%
Zapletal D., Barabasz B.
Roczniki Naukowe Zootechniki. Suplement
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2005
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tom 22
|
nr 2
2

The influence of the source of sulphur on its intake by sheep

81%
Chladek G., Kuchtik J., Zapletal D.
Zeszyty Naukowe Akademii Rolniczej we Wrocławiu. Zootechnika
|
2004
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tom 52
The intake of sulphur offered in different forms was observed in ten ewes of Merino breed during one year. Four sources of sulphur were used: ammonium sulphate, sodium sulphate, calcium sulphate and sulphur. The effect of season (sprihg, summer, autumn and winter) and a phase of reproduction cycle (gestation, lactation, barren period) on the consumption of various sulphur sources were analysed. Significant differences in the intake of sulphur were found in summer, winter (both p<0.01) and autumn (p<0.05) and non-significant differences in spring. A phase of reproduction also affected the intake of sulphur; significant differences were found during gestation, barren period (both p<0.01) and lactation (p<0.05).
3

Effect of spermatozoa concentration in insemination dose on reproductive performance of rabbit does after artificial insemination

80%
Zapletal D., Kuchtik J., Adamec V., Nowakowski P.
Electronic Journal of Polish Agricultural Universities. Series Animal Husbandry
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2005
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tom 08
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nr 1
The aim of the study was to evaluate the effect of different concentrations of spermatozoa in insemination dose (ID) on fertility rate of inseminated does, and on the number of all and live-born young per litter in the breed of crossbred rabbits by using certain rates of dilution. The crossbred rabbits of female strain HYPLUS PS 19 and male strain HYPLUS PS 39 were used in the experiment. In the first part of the experiment does were inseminated with ID 0.5 cm3 with the concentrations of spermatozoa from 115 to 550 x 106 in 1 cm3. In the second part of the experiment does were inseminated with the same volume of ID (0.5 cm3), however with the lower concentration, namely from 55 to 150 x 106 in 1 cm3. The particular concentrations of spermatozoa in ID had no statistically significant effect on fertility rate and number of all and live born young per litter in both parts of experiment.
4

Changes in physico-chemical characteristics, somatic cell count and fatty acid profile of Brown Short-haired goat milk during lactation

61%
Kuchtik J., Kralickova S., Zapletal D., Weglarzy K., Sustova K., Skrzyzala I.
Animal Science Papers and Reports
|
2015
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tom 33
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nr 1
The main aim of this study was to evaluate the effect of the lactation stage (SL) on the fatty acids (FA) profile of raw milk of Brown Short-haired goats reared under organic regime. An integraf part of the study was also to assess the effect of the SL on the physico-chemical characteristics and somatic cell count (SCC) of milk. Milk records and samplings of each goat were carried out seven times from April to October. SL had a significant effect on contents of almost all monitored physicochemical properties, somatic cell counts (SCC) and FA of milk and also on average daily milk yield (DMY). DMY gradually decreased with advanced lactation (from 3.44 to 1.44 litre), whereas the content of total solids (TS) increased in the course of lactation (from 10.9 to 14.0%). Also the content of milk fat (F) increased in the course of lactation (from 3.2 to 4.7%). Contents of total protein (TP) and casein (C) were relatively high in early lactation, decreased as lactation peaked and increased towards to late lactation (3.7% of TP and 2.6% of C). Titratable acidity (TA) gradually increased from 90th day (6.2°SH) to the end of lactation (8.5°SH), while positive correlations with TS, F, TP,C and lactose were found. SCC increased as lactation advanced, moreover, a positive correlation among SCC and TA and TS was found. The SL had a significant effect on all FA groups. PUFA gradually decreased towards to late lactation, which was caused mainly by the content of linoleic acid. Similarly, the presence of linolenic acid and PUFA/SFA ratio showed a decreasing tendency with advanced lactation. Also the CLA content was the lowest at the end of lactation. PUFA n-6/n-3 ratio increased in mid lactation (7.8) and hereafter decreased towards to late lactation (3.5). In our opinion, a less favourable presence of particular groups of FA in late lactation was related with a decrease in pasture quality under organic conditions.
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