發(fā)布時間：2018-08-24 18:51

【摘要】：本次試驗以伊犁河谷地區(qū)昭蘇馬場的30匹伊犁馬為研究對象,研究伊犁馬胎次(第4胎次、第7胎次、第8胎次)、泌乳月份(8月、9月、10月)、采樣時間點(11、13、16時)對乳脂率的影響。伊犁馬一般于7月份開始泌乳,第一個月不擠奶,用于哺育馬駒。即試驗開始于8月份,根據(jù)伊犁馬乳房的生理特點,每匹馬每10 d采一次奶樣,每次采集4個時間點的奶樣,用量筒稱量,每個時間點采集50 mL奶樣,并利用乳成分測定儀測定馬匹的乳脂率,分析乳脂率的影響因素,通過響應(yīng)曲面的分析獲得最佳變量水平。采用Design-Expert 8.0.5軟件中的Box-Behnken Design響應(yīng)曲面法對影響乳品品質(zhì)的因素不同胎次、不同時間段和不同泌乳月份進行探討。設(shè)計3因素3水平的試驗,建立數(shù)學(xué)模型。結(jié)果顯示不同胎次與不同擠乳時間段、不同泌乳月份與不同胎次的交互作用對乳脂率有顯著影響P0.05)。二次多元回歸模型為:Y=0.85+0.026X1+0.073X2-0.044X3+0.075X1X2-0.093X1X3+0.01X2X3-0.11X12-0.014X22-0.016X32。P0.01,表明模型高度顯著,模型的調(diào)整確定系數(shù)R2adj為0.7649,說明該模型能解釋76.49%響應(yīng)值的變化,可以用此模型對乳脂率進行分析和預(yù)測。同時得出在伊犁馬第8胎次、采樣時間點為16時、泌乳月份為8月時,乳脂率為最佳水平,為1.01%。
[Abstract]:The effects of birth order (4th, 7th, 8th), milk months (August, September, October) and sampling time (1113, 16:00) on milk fat rate of 30 Yili horses in Zhaosu horse farm in Yili River Valley area were studied. Ili horses generally start lactation in July, the first month not milking, used for feeding pony. That is, the experiment began in August. According to the physiological characteristics of the breasts of the Yili horse, the milk samples were collected once every 10 days, and the milk samples were collected at four time points each time. The milk samples were measured with a measuring tube and 50 mL milk samples were collected at each time point. The milk fat percentage of the horse was measured by milk component analyzer, the influencing factors of milk fat rate were analyzed, and the best variable level was obtained by the analysis of the response surface. The Box-Behnken Design response surface method of Design-Expert 8.0.5 software was used to study the factors affecting dairy quality, such as different birth order, different time period and different lactation month. Three factors and three levels of experiments were designed and mathematical models were established. The results showed that the interaction of different milking months and different milking times had a significant effect on the milk fat rate (P0.05). The quadratic multivariate regression model is 0. 85 0.026X1 0.073X2-0.044X3 0.075X1X2-0.093X1X3 0.01X2X3-0.11X12-0.014X22-0.016X32.P0.01, which indicates that the model has a significant model height, and the adjusted determination coefficient (R2adj) of the model is 0.7649, which indicates that the model can explain the change of the response value of 76.49%, and the milk fat rate can be analyzed and predicted by this model. At the same time, at the 8th parity of Yili horse, the sampling time point is 16:00, and the milk fat rate is 1.01when the milk month is August.
【學(xué)位授予單位】：新疆農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S821

【參考文獻】

相關(guān)期刊論文 前10條

1 耿娟;馬克想;;新疆馬業(yè)發(fā)展現(xiàn)狀及存在的問題[J];新疆畜牧業(yè);2013年09期

2 高曉黎;楊國安;李捷;;新疆特色馬產(chǎn)業(yè)發(fā)展的空間格局及其優(yōu)化[J];草食家畜;2013年03期

3 胡志耘;梁琪;張衛(wèi)兵;楊敏;崔娜;高維東;文鵬程;;不同胎次和泌乳天數(shù)對牦牛初乳營養(yǎng)品質(zhì)的影響[J];食品科學(xué)技術(shù)學(xué)報;2013年01期

4 陸東林;劉朋龍;王生俊;馮葳;張靜;;新疆馬乳產(chǎn)業(yè)發(fā)展初探[J];中國乳業(yè);2012年11期

5 王東衛(wèi);王之盛;王瑜;溫萬;邵懷峰;李勝利;曹志軍;;不同時間乳樣乳成分相關(guān)性的研究[J];中國畜牧雜志;2011年17期

6 郝琪;楊林松;曹立波;;基于響應(yīng)面法的車身剛度特性的優(yōu)化設(shè)計[J];機械科學(xué)與技術(shù);2010年11期

7 段向陽;張春紅;鄭拉弟;趙永猛;馬新兵;駱榮生;黃錫霞;;胎次對西北地區(qū)西門塔爾牛產(chǎn)奶量的影響[J];中國奶牛;2009年09期

8 葉再華;姚新奎;潘小東;周新;玉山江;茍榮;李紅;;伊犁馬屠宰性能測定及適宜屠宰年齡研究[J];新疆農(nóng)業(yè)大學(xué)學(xué)報;2008年03期

9 姚新奎;歐陽文;譚曉海;湯靈姿;;新疆特色馬產(chǎn)業(yè)探析[J];新疆農(nóng)業(yè)科學(xué);2007年02期

10 鄭瑞波;王志剛;于世浩;;影響奶牛乳脂率的因素及提高措施[J];中國奶牛;2006年07期

，

本文編號：2201719