本文選題：濃縮糖蜜發(fā)酵液　切入點(diǎn)：奶牛　出處：《新疆農(nóng)業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：本研究通過(guò)兩個(gè)試驗(yàn)評(píng)價(jià)了濃縮糖蜜發(fā)酵液(condensed molasses fermentation solubles,CMS)在奶牛日糧中的安全性,研究了CMS在奶牛日糧中的適宜飼喂量,以及CMS對(duì)奶牛瘤胃發(fā)酵、血液指標(biāo)、生產(chǎn)性能和營(yíng)養(yǎng)物質(zhì)表觀消化率的影響,分析了CMS應(yīng)用于奶牛日糧中的經(jīng)濟(jì)效益。具體試驗(yàn)方法和結(jié)果如下:試驗(yàn)一選用75頭泌乳高峰期經(jīng)產(chǎn)荷斯坦奶牛,按年齡、體重、胎次、泌乳天數(shù)、體細(xì)胞數(shù)(SCC)、產(chǎn)奶量等相近的原則隨機(jī)分為5組(對(duì)照組、0.5%CMS組、1.5%CMS組、2.5%CMS組和5%CMS組),每組15個(gè)重復(fù),每個(gè)重復(fù)1頭牛。對(duì)照組飼喂基礎(chǔ)日糧,處理組在對(duì)照組日糧基礎(chǔ)上分別飼喂0.5%、1.5%、2.5%和5%CMS(TMR%),各組日糧保持等氮等能。預(yù)試期7 d,正試期45 d。試驗(yàn)結(jié)果表明:1)CMS適宜飼喂量為1.5%,當(dāng)超過(guò)1.5%時(shí),牛只會(huì)出現(xiàn)腹瀉;2)對(duì)照組、0.5%和1.5%CMS組DMI顯著高于5%CMS組(P0.05);3)對(duì)照組、0.5%和1.5%CMS組產(chǎn)奶量顯著高于2.5%和5%CMS組(P0.05),且2.5%CMS組產(chǎn)奶量顯著高于5%CMS組(P0.05);4)對(duì)照組、0.5%和1.5%CMS組乳蛋白率顯著高于2.5%和5%CMS組(P0.05);5)2.5%CMS組牛奶尿素氮顯著高于0.5%CMS組(P0.05)。試驗(yàn)二通過(guò)試驗(yàn)一的研究篩選得到CMS適宜的飼喂量,進(jìn)一步細(xì)化研究安全劑量下CMS對(duì)奶牛瘤胃發(fā)酵、血液指標(biāo)、生產(chǎn)性能和營(yíng)養(yǎng)物質(zhì)表觀消化率的影響。試驗(yàn)選用45頭泌乳中期經(jīng)產(chǎn)荷斯坦奶牛,按年齡、體重、胎次、泌乳天數(shù)、體細(xì)胞數(shù)(SCC)和產(chǎn)奶量等相近的原則隨機(jī)分為3組(對(duì)照組、0.75%CMS組和1.5%CMS組),每組15個(gè)重復(fù),每個(gè)重復(fù)1頭牛。對(duì)照組飼喂基礎(chǔ)日糧,試驗(yàn)組在對(duì)照組日糧基礎(chǔ)上分別飼喂0.75%和1.5%CMS(TMR%),各組日糧保持等氮等能。預(yù)試期15 d,正試期60 d。試驗(yàn)結(jié)果表明:1)不同劑量CMS對(duì)奶牛瘤胃發(fā)酵指標(biāo)的影響沒有顯著性差異(P0.05);2)不同劑量CMS對(duì)奶牛血液指標(biāo)的影響沒有顯著性差異(P0.05);3)1.5%CMS組DMI和乳蛋白率顯著高于0.75%CMS組和對(duì)照組(P0.05),1.5%CMS組產(chǎn)奶量和飼料蛋白質(zhì)表觀消化率顯著高于對(duì)照組(P0.05),1.5%CMS組4%校正乳極顯著高于0.75%CMS組和對(duì)照組(P0.01);4)0.75%CMS組體細(xì)胞數(shù)顯著低于對(duì)照組(P0.05);5)0.75%和1.5%CMS的經(jīng)濟(jì)效益高于對(duì)照組。結(jié)論:奶牛日糧中CMS的適宜的飼喂量為1.5%,不宜超過(guò)1.5%,過(guò)量的CMS會(huì)導(dǎo)致奶牛腹瀉,影響乳品質(zhì);1.5%CMS能提高奶牛DMI、產(chǎn)奶量、乳蛋白率和飼料蛋白質(zhì)表觀消化率,在一定程度上能降低體細(xì)胞數(shù),同時(shí)能帶來(lái)一定的經(jīng)濟(jì)效益。
[Abstract]:Two experiments were conducted to evaluate the safety of concentrated molasses molasses fermentation solublesCMSs in dairy cattle diet, and to study the appropriate feed rate of CMS in dairy cattle diet, as well as the effects of CMS on rumen fermentation and blood index of dairy cattle. The effects of production performance and apparent digestibility of nutrients on the economic benefit of CMS application in dairy cattle diet were analyzed. The specific test methods and results were as follows: in experiment 1 75 Holstein cows with peak lactating period were selected according to their age and body weight. The similar principles of birth order, lactation days, somatic cell count and milk yield were randomly divided into 5 groups (control group, 0.5 CMS group, 1.5cm CMS group, 2.5cm CMS group and 5cm CMS group, 15 replicates in each group, 1 cow per repeat). The control group was fed with basal diet. On the basis of the diet of the control group, the treatment group was fed 0.5% and 1.5% and 5% CMST MRN, respectively, and each group maintained equal nitrogen and equal energy. The experimental period was 7 days, and the positive test period was 45 days. The results showed that the appropriate feeding amount of CMS was 1.5%, and when it was more than 1.5%, The milk yield of the control group 0.5% and 1.5CMS group was significantly higher than that of the 5CMS group P0.05%) the milk yield of the control group 0.5% and 1.5% was significantly higher than that of the 2.5% and 5 CMS groups, and the milk yield of the 2.5% CMS group was significantly higher than that of the 5CMS group P0.054) the milk protein rates of the control group 0.5% and 1.5% were significantly higher than that of the control group P0.05%. The milk urea nitrogen of the 2.5% and 5 CMS groups was significantly higher than that of the 0.5 CMS group. The effects of CMS on rumen fermentation, blood index, production performance and apparent digestibility of nutrients were further studied at safe dose. 45 Holstein cows were selected according to age, body weight, birth order and lactation days. The similar principles of SCC count and milk yield were randomly divided into 3 groups (control group 0.75 CMS group and 1.5 CMS group, 15 replicates in each group and 1 cow per repeat). The control group was fed basic diet. The experimental group was fed with 0.75% and 1.5 CMS on the basis of the control diet respectively. The diets in each group maintained isonitrogen isoenergy. The experimental period was 15 days and the positive test period was 60 days. The results showed that the effects of different doses of CMS on rumen fermentation index of dairy cattle were not significantly different. There was no significant difference in the effect of different doses of CMS on the blood indexes of dairy cows. The DMI and milk protein rates in P0.05T3 / 1.5 CMS group were significantly higher than those in the 0.75 CMS group and the control group (P0.05) and the apparent digestibility of feed protein was significantly higher than that in the control P0.051.5 CMS group (P 0.05). The apparent digestibility of feed protein was significantly higher than that in the control P0.051.5 CMS group. The number of somatic cells in the milk extremely higher than that in the 0.75 CMS group and the control group was significantly lower than that in the control group (P 0.05) 0.75% and 1.5 CMS respectively. Conclusion: the appropriate feeding amount of CMS in the diet of dairy cows is 1.5, not more than 1.5. Excessive CMS can lead to diarrhea in dairy cows. The effect of CMS on milk quality can improve DMI, milk yield, milk protein rate and apparent digestibility of feed protein, reduce the number of somatic cells to a certain extent, and bring some economic benefits at the same time.
【學(xué)位授予單位】：新疆農(nóng)業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：S823.5

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