不同饲粮模式对奶牛乳腺长链脂肪酸摄取的影响
发布时间：2019-08-05 13:02
【摘要】：本试验旨在研究不同饲粮模式对奶牛乳腺长链脂肪酸摄取的影响。选用健康且胎次、体重[(554±21)kg]、泌乳期[(120±4)d]和产奶量[(24.30±1.47)kg/d]相近的荷斯坦奶牛30头,采用随机区组设计,分为3组,每组10头。3组奶牛饲喂不同模式的饲粮,即以苜蓿、羊草和全株玉米青贮为粗饲料的饲粮(MF组)、营养水平约同MF组但以单一玉米秸秆为粗饲料的饲粮(CS1组)和粗饲料比例等同MF组但以单一玉米秸秆为粗饲料的饲粮(CS2组)。试验期90 d,分3期进行,每期30 d,在每期的最后2 d采集饲粮样、乳样和血样进行检测分析。结果表明:1)不同饲粮模式对奶牛的体重和干物质采食量均无显著影响(P0.05),但对奶牛的产奶量、乳脂率和日乳脂产量均有显著影响(P0.05)。MF组的产奶量和日乳脂产量均显著高于CS1组和CS2组(P0.05),而CS1组则显著高于CS2组(P0.05);MF组的乳脂率显著高于CS1组(P0.05)。2)不同饲粮模式对奶牛动、静脉血浆中C16∶0、C18∶0、C18∶2cis-6、C18∶1 cis-9和总长链脂肪酸的浓度均无显著影响(P0.05)。3)不同饲粮模式对奶牛的血流量造成了显著的影响(P0.05),呈现出CS1组MF组CS2组。不同饲粮模式影响了奶牛动脉对总长链脂肪酸的供给量,表现为MF组和CS1组显著大于CS2组(5 629.51、6 605.02 g/d vs.3 878.91 g/d)(P0.05)。4)不同饲粮模式影响了奶牛乳腺对总长链脂肪酸的摄取率,表现为MF组和CS2组显著高于CS1组(10.99%、10.84%vs.7.39%)(P0.05)。5)不同饲粮模式影响了奶牛乳腺对总长链脂肪酸的摄取量,表现为MF组(618.69 g/d)CS1组(487.87 g/d)CS2组(420.56 g/d),组间差异显著(P0.05)。本研究揭示了在低质粗饲料条件下,增加精料浓度并不能有效提高奶牛乳腺对长链脂肪酸的摄取。
[Abstract]:The purpose of this study was to study the effects of different dietary patterns on breast long chain fatty acid uptake in dairy cows. Thirty Holstein cows with healthy and parity, body weight [(554 卤21) kg], lactation period [(120 卤4) d] and milk yield [(24. 30 卤1. 47) kg/d] were randomly divided into 3 groups with 10 cows in each group. The cows in the three groups were fed with different models of diet, that is, Medicago sativa, Leymus chinensis and whole plant corn silage as roughage (MF group), and 30 Holstein cows with similar lactation period [(120 卤4) d] and milk yield [(24. 30 卤1. 47) kg/d] were randomly divided into 3 groups with 10 cows in each group. The nutritional level of the diet with single corn straw as roughage (CS1 group) and roughage ratio was about the same as that of MF group but with single corn straw as roughage group (CS2 group). The experimental period was 90 days, divided into 3 stages, 30 days each. Dietary samples, milk samples and blood samples were collected at the last 2 days of each phase for detection and analysis. The results showed that: 1) different dietary patterns had no significant effect on body weight and dry matter intake of dairy cows (P 0.05), but had significant effects on milk yield, milk fat rate and daily milk fat yield of dairy cows (P 0.05). The milk yield and daily milk fat yield of). MF group were significantly higher than those of CS1 group and CS2 group (P 0.05), while those of CS1 group were significantly higher than those of CS2 group (P 0.05). The milk fat rate of MF group was significantly higher than that of CS1 group (P 0.05). 2) different dietary patterns had no significant effect on blood flow of dairy cows in MF group (P 0.05). Different dietary patterns had no significant effect on the blood flow of dairy cows in MF group (P 0.05). 2) different dietary patterns had no significant effect on the blood flow of dairy cows (P 0.05), and there were no significant effects on the blood flow of dairy cows in different dietary patterns (P 0.05), showing that different dietary patterns had no significant effect on the blood flow of dairy cows in animal and venous plasma C16 鈮，
本文编号：2523137
[Abstract]:The purpose of this study was to study the effects of different dietary patterns on breast long chain fatty acid uptake in dairy cows. Thirty Holstein cows with healthy and parity, body weight [(554 卤21) kg], lactation period [(120 卤4) d] and milk yield [(24. 30 卤1. 47) kg/d] were randomly divided into 3 groups with 10 cows in each group. The cows in the three groups were fed with different models of diet, that is, Medicago sativa, Leymus chinensis and whole plant corn silage as roughage (MF group), and 30 Holstein cows with similar lactation period [(120 卤4) d] and milk yield [(24. 30 卤1. 47) kg/d] were randomly divided into 3 groups with 10 cows in each group. The nutritional level of the diet with single corn straw as roughage (CS1 group) and roughage ratio was about the same as that of MF group but with single corn straw as roughage group (CS2 group). The experimental period was 90 days, divided into 3 stages, 30 days each. Dietary samples, milk samples and blood samples were collected at the last 2 days of each phase for detection and analysis. The results showed that: 1) different dietary patterns had no significant effect on body weight and dry matter intake of dairy cows (P 0.05), but had significant effects on milk yield, milk fat rate and daily milk fat yield of dairy cows (P 0.05). The milk yield and daily milk fat yield of). MF group were significantly higher than those of CS1 group and CS2 group (P 0.05), while those of CS1 group were significantly higher than those of CS2 group (P 0.05). The milk fat rate of MF group was significantly higher than that of CS1 group (P 0.05). 2) different dietary patterns had no significant effect on blood flow of dairy cows in MF group (P 0.05). Different dietary patterns had no significant effect on the blood flow of dairy cows in MF group (P 0.05). 2) different dietary patterns had no significant effect on the blood flow of dairy cows (P 0.05), and there were no significant effects on the blood flow of dairy cows in different dietary patterns (P 0.05), showing that different dietary patterns had no significant effect on the blood flow of dairy cows in animal and venous plasma C16 鈮，
本文编号：2523137
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