本文選題：奶牛 + 蛋白質(zhì)飼料�。� 參考：《南京農(nóng)業(yè)大學》2015年碩士論文

【摘要】：本試驗研究在不同蛋白源日糧及不同蛋白源日糧中添加蛋氨酸羥基類似物異丙酯(HMBi)對中國荷斯坦奶牛生產(chǎn)性能和血液生化指標的影響。本試驗分為兩個部分:1、不同蛋白源日糧對奶牛飼料采食量和產(chǎn)奶量的影響21頭泌乳中期健康荷斯坦奶牛被隨機分配成3組,每組7頭,試驗奶牛精料、粗料分開飼喂,以等能等蛋白的原則分組,對照組飼喂原奶牛場配方配制的精料補充料(未添加任何雙低菜粕),試驗Ⅰ組和試驗Ⅱ組飼喂含有1.03 kg/d、1.66 kg/d的國內(nèi)壓榨的雙低菜粕精料補充料,試驗四周,試驗結(jié)果表明對照組跟試驗Ⅰ、Ⅱ組差異性顯著(P0.05),試驗Ⅰ、Ⅱ組之間差異顯著(P0.05)且對照組的采食速度要比試驗Ⅰ、Ⅱ組分別慢1.47min和1.93min。試驗組產(chǎn)奶量、乳成分差異不顯著,與對照組相比,試驗Ⅰ、Ⅱ組血清總蛋白分別提高16.83%(P0.05)、7.99%(P0.05),試驗Ⅰ、Ⅱ組血清游離組氨酸顯著高于對照組(P0.05),試驗Ⅱ組絲氨酸、蛋氨酸、酪氨酸水平高于對照組,血清氨顯著低于對照組(P0.05)。說明雙低菜粕可提高精料的適口性但不影響乳成分。2、不同蛋白源補飼蛋氨酸羥基類似物異丙酯對奶牛生產(chǎn)性能的影響選取60頭年齡、胎次、泌乳期和產(chǎn)奶量相近,健康無疾病的中國荷斯坦奶牛。配對后隨機分成4組,每組15頭,分別為豆粕對照組、菜粕對照組、豆粕試驗組和菜粕試驗組,豆粕對照組的蛋白源為豆粕、棉粕和DDGS,菜粕對照組的蛋白源為雙低菜粕代替部分棉粕和DDGS,試驗前組間日產(chǎn)奶量、體重、胎次、泌乳天數(shù)差異不顯著,豆粕試驗組、菜粕試驗組分別在豆粕-棉粕日糧和雙低菜粕日糧中添加蛋氨酸羥基類似物異丙酯。試驗結(jié)果表明不同蛋白源補充蛋氨酸羥基類似物異丙酯對奶牛產(chǎn)奶量的影響差異均不顯著,但雙低菜粕替代部分豆粕棉粕奶牛產(chǎn)奶量提高了 0.76kg/d,豆粕日糧添加蛋氨酸羥基類似物異丙酯奶牛產(chǎn)奶量比豆粕對照組提高了 1.84kg/d,菜粕組添加蛋氨酸羥基類似物異丙酯比菜粕對照組提高了 1.88kg/d,因此添加蛋氨酸羥基類似物異丙醋有提高奶牛產(chǎn)奶量的趨勢,菜粕日糧添加蛋氨酸羥基類似物異丙酯效果更佳。不同蛋白源日糧補充蛋氨酸羥基類似物異丙酯,對牛奶中的乳成分沒有顯著影響(P0.05),但菜粕試驗組奶牛乳蛋白水平最高;不同蛋白源補充蛋氨酸羥基類似物異丙酯對牛奶中體細胞數(shù)無顯著影響(P0.05);不同蛋白源補充蛋氨酸羥基類似物異丙酯對牛奶尿素氮的影響不同,與豆粕對照組相比,菜粕日糧補充蛋氨酸羥基類似物異丙酯乳尿素氮水平顯著下降,差異顯著(P0.05),其余各組差異不顯著,菜粕日糧與豆粕日糧相比,乳尿素氮呈現(xiàn)下降的趨勢,在豆粕日糧和菜粕日糧補充蛋氨酸羥基類似物異丙酯乳尿素氮降低,因此補充蛋氨酸羥基類似物異丙酯能夠改善日糧蛋白質(zhì)代謝。不同蛋白源補充蛋氨酸羥基類似物異丙醋對奶牛血液生化指標的影響差異不顯著(P0.05),但與對照組相比,豆粕日糧和菜粕日糧補充蛋氨酸羥基類似物異丙酯,奶牛血液葡萄糖有升高趨勢,總蛋白、白蛋白、球蛋白和膽固醇分別有升高和降低的趨勢,但差異不顯著,2種日糧補充蛋氨酸羥基類似物異丙酯,對血液甘油三酯均沒有影響。因此本試驗可得出,奶牛日糧中用菜粕替代部分棉粕和DDGS并補充蛋氨酸羥基類似物異丙酯效果較好。
[Abstract]:The effects of methionine hydroxy analogue isopropyl (HMBi) on the production performance and blood biochemical indexes of Chinese Holstein cows were investigated in this experiment. The experiment was divided into two parts: 1, the effects of different protein source diets on feed intake and milk yield of dairy cows were in the mid-term health of 21 lactating cows. Holstein cows were randomly assigned to 3 groups, each group of 7 heads, the dairy concentrate, the crude material were fed separately, the equal protein was divided into groups, and the control group was fed with the raw milk cow field formula (without any double low rapeseed meal). The experiment I and the test II Group were fed with the domestic pressed double low rapeseed meal containing 1.03 kg/d and 1.66 kg/d. Material supplement, experimental four weeks, the test results showed that the control group followed the test I, group II, the difference was significant (P0.05), the test I, the difference between group II was significant (P0.05) and the control group was better than the test I, the group II of the slow 1.47min and 1.93min. test group milk production, milk composition difference is not significant, compared with the control group, the test I, group II sera serum The total protein increased by 16.83% (P0.05), 7.99% (P0.05), test I, and group II serum free histidine was significantly higher than that of the control group (P0.05). The serine, methionine and tyrosine levels in group II were higher than those in the control group, and the serum ammonia was significantly lower than the control group (P0.05). The effects of methionine hydroxyl group isopropyl on the production performance of dairy cows were divided into 4 groups of 15 heads of 15 heads in each group, including soybean meal control group, rapeseed meal control group, rapeseed meal test group and soybean meal control group. The source is soybean meal, cottonseed meal and DDGS, the protein source of the rapeseed meal control group is double low rapeseed meal instead of partial cottonseed meal and DDGS. The difference of daily milk quantity, weight, birth order and lactation days between the test groups is not significant. The test group of soybean meal test group and rapeseed meal test group added methionine hydroxy analogue isopropyl ester in soybean meal diet and double low rapeseed meal. The results showed that the difference of the effect of isopropyl methionine hydroxy analogues with different protein sources on milk production was not significant, but the milk yield of dairy cows was increased by 0.76kg/d with double low rapeseed meal instead of some soybean meal, and the milk yield of dairy cows supplemented with methionine hydroxyl analogs increased by 1.84kg/d and rapeseed meal group. Methionine hydroxy analogue isopropyl ester increased 1.88kg/d in comparison with rapeseed meal control group, so adding methionine hydroxyl similar isopropane vinegar could improve milk production of dairy cows. The effect of methionine hydroxyl analogues to isopropyl ester in rapeseed meal was better. There was no significant effect (P0.05), but the milk protein level was the highest in the rapeseed meal test group, and there was no significant effect on the number of somatic cells in milk (P0.05) with different protein sources supplemented with methionine hydroxyl group (isopropyl isopropyl), and the effect of isopropyl isopropyl methionine hydroxy analogs on milk urea nitrogen was different, compared with soybean meal control group, rapeseed meal day The levels of urea nitrogen in the diet supplemented with methionine hydroxyl group were significantly decreased (P0.05), and the difference was not significant in the other groups. The urea nitrogen in the rapeseed meal and the soybean meal showed a downward trend. The supplemental methionine supplementation was supplemented by the supplemental methionine supplementation in the diet and rapeseed meal supplemented with isopropyl isopropyl urea nitrogen in the diet and rapeseed meal. The effect of isopropyl isopropyl ester of hydroxyl group on dietary protein metabolism was improved. The effect of methionine hydroxyl analogs on the blood biochemical indexes of dairy cows was not significant (P0.05), but compared with the control group, the diet and rapeseed meal supplemented with isopropium methionine hydroxy analogues, and the blood glucose increased in dairy cows. The total protein, albumin, globulin and cholesterol were increased and reduced respectively, but the difference was not significant. The 2 diets supplemented with methionine hydroxyl similar isopropyl ester and had no effect on the triglyceride in the blood. Therefore, we can conclude that the meal in dairy cows instead of partial cottonseed meal and DDGS and supplementation of isopropyl methionine hydroxy analogues in the diet of dairy cows The effect is good.
【學位授予單位】：南京農(nóng)業(yè)大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：S823.5

【參考文獻】

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本文編號：2024190