Department of Animal Breeding and Product Quality Assessment, Poznań University of Life Sciences, Słoneczna 1, 62-002 Suchy Las, Poland.
Department of Animal Breeding and Product Quality Assessment, Poznań University of Life Sciences, Słoneczna 1, 62-002 Suchy Las, Poland.
Animal. 2023 Jun;17(6):100848. doi: 10.1016/j.animal.2023.100848. Epub 2023 May 11.
Increasing the knowledge of rabbit milk can help in breeding practice to solve issues considering the health and growth of rabbit kits. The goal of the study was to perform a broad physicochemical analysis of rabbit milk and examine the effect of the reproductive status of the females on daily milk yield and milk attributes. The study was conducted on a commercial rabbit farm and included three consecutive lactations of Hycole does. It has been observed that the daily milk production increased from the 2nd till the 14th day of lactation when does produced almost 300 g of milk daily. The day of lactation caused a significant variation in the content of total solids, solids-not-fat, total protein, casein, lactose, C18: 2, C18: 3, Somatic Cell Count, and pH. The percentage of fat globules categorised according to their diameter changed with the ongoing lactation as well, and the diameter increased from 5 to 7 µm. The percentage of small milk fat globules decreased with lactation day, causing a possible decrease in the digestions rates of milk. Pregnancy had a negative impact on milk production, kits growth performance, and the content of total protein, solids-not-fat, and lactose in milk. Therefore, we can speculate about the negative impact of overlapping lactations and pregnancies on rabbit kits, as their growth is dependent on milk production and composition.
提高对兔乳的认识有助于在繁殖实践中解决考虑到仔兔健康和生长的问题。本研究的目的是对兔乳进行广泛的物理化学分析，并研究母兔的繁殖状态对每日产奶量和乳成分的影响。该研究在商业兔场进行，包括三个连续的 Hycole 母兔泌乳期。研究表明，母兔在泌乳的第 2 天到第 14 天，每天的产奶量增加了近 300 克。泌乳天数导致总固体、非脂固体、总蛋白、酪蛋白、乳糖、C18:2、C18:3、体细胞计数和 pH 值的含量发生显著变化。根据直径对脂肪球进行分类的百分比也随泌乳天数的变化而变化，直径从 5 到 7µm 增加。小乳脂球的百分比随着泌乳天数的增加而减少，这可能导致乳的消化率降低。妊娠对产奶量、仔兔生长性能以及乳中总蛋白、非脂固体和乳糖的含量有负面影响。因此，我们可以推测重叠的泌乳期和妊娠对仔兔的负面影响，因为它们的生长依赖于产奶量和组成。
