妊娠早期骆驼饲粮补充对产奶量和乳成分的影响

Florence Thiakunu, K.B. Njehia, P. Nguhiu, J. Arimi
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引用次数: 0

摘要

这项研究是在2022年1月至3月期间进行的,当时是伊西奥洛县Ngaremara区的骆驼交配季节。目的是确定饲料补充对妊娠早期产奶量和乳成分的影响。据记载,畜牧环境中的骆驼在受孕后立即减少产奶量。在这一阶段,关于补充维生素d对产奶量影响的文献资料有限。采用完全随机设计选择10只骆驼,其中10只骆驼补充了由当地可获得的材料制成的配方浓缩补充剂,10只骆驼未补充作为对照。在研究开始时,所有骆驼都被除了虫。将配方饲料逐步引入10只骆驼,每天添加1公斤,并用绿色金合欢豆荚引诱它们,持续2周,直到所有补充物在放牧后的晚上都能喂3.5公斤。在2022年1月6日至2月15日期间,用一头公牛自然交配,一只补充骆驼和两只未补充骆驼没有交配。挤奶是在早晨进行的,在这之前,小牛会刺激奶头产生放奶反射。每天记录以升为单位的牛奶产量,并按每周将每头骆驼的总产量制成表格。每周采集牛奶样本,分析蛋白质和脂肪水平。产奶量的统计数据分析采用方差分析和SPSS软件比较周均值。补充组和未补充组骆驼平均每周产奶量(升)分别为8.6067±0.23691和8.0797±0.26185。补饲骆驼的产奶量持续增加,第3周显著增加1.63升(P<0.05)。未添加饲粮的骆驼产奶量持续下降,且在第5周和第7周更为显著(P<0.05)。与未添加骆驼奶的3.157±0.0228相比,添加骆驼奶的脂肪含量增加了3.470±0.0300。补充的骆驼比未补充的骆驼更早交配。当雄性或人类接近时,通过翘尾的土著知识方法(kutoa mkia)确认了6只补充和5只未补充的怀孕。本研究表明,添加饲料对骆驼泌乳曲线和生育力有积极影响。建议在骆驼交配前后用当地可获得的材料补充饲料配方,以提高产量和繁殖能力。建议进一步研究以确定怀孕对产奶量和成分的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of camel feed supplementation on milk yields and composition during early pregnancy period
A study was conducted between January and March 2022 which was the camel mating season at Ngaremara ward of Isiolo County. The objective was to determine the effect of feed supplementation on milk yield and composition in early pregnancy. It is documented that camels in pastoral environment drop milk production immediately after conception. There is limited information in literature on effects of supplementation on milk production at this stage. A complete randomized design was used to select ten camels which were supplemented with a formulated concentrate supplement made of locally available materials and ten un-supplemented which was the control. All camels were dewormed at the beginning of the study. Formulated feeds were gradually introduced to ten camels by adding 1 kg daily and enticing them with green acacia pods for 2 weeks until all supplemented were able to feed 3.5 kgs in the evening after grazing.  Mating took place naturally using a bull between 6th January and 15th February 2022 and one supplemented and two un-supplemented camels were not mated. Milking was done in the mornings after allowing the calves to stimulate the teats for the milk letdown reflex. Production of milk in litres was recorded daily and total production per camel tabulated on weekly basis. Milk samples were taken every week and analyzed for protein and fat levels. Statistical data analysis for milk yields was done by comparing weekly means using ANOVA with the help of SPSS. Mean weekly milk yields per camel in litres for the supplemented and un-supplemented was 8.6067 ± 0.23691 and 8.0797±0.26185 respectively. There was a consistent increase in milk production for the supplemented camels with a significant increase of 1.63 litres at week 3 (P<0.05). The un-supplemented camels had a consistent drop of milk production which was more significant (P<0.05) at week 5 and 7. Supplemented camels milk had percentage increase in fat content of 3.470 ±0.0300 compared to 3.157±0.0228 for the un-supplemented. The supplemented camels were mated earlier than the un-supplemented. Six supplemented and five un-supplemented were confirmed pregnant through the indigenous knowledge method of cocking the tail (kutoa mkia) when the male or a person approaches. The study concludes that feed supplementation can positively affect the lactation curve and fertility in camels. It is recommended that camels be supplemented with feed formulations made from locally available materials at around the time of mating to improve production and reproduction. Further studies are recommended to determine the effect of pregnancy on milk yields and composition.
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