本文選題：雜交肉牛 + 增重凈能��； 參考：《西南農(nóng)業(yè)學(xué)報(bào)》2017年07期

【摘要】：【目的】本研究通過配制不同增重凈能的精補(bǔ)料來探討提高增重凈能濃度飼喂雜交肉牛的育肥性能和產(chǎn)肉效益�！痉椒ā窟x擇40頭體重相近(400.8±32.1 kg)的周歲西門塔爾雜交肉牛隨機(jī)分為4個(gè)試驗(yàn)組,雜交肉牛分別飼喂4組按等同梯度從5.27MJ/kg遞增到5.90 MJ/kg增重凈能的等同蛋白質(zhì)和必需氨基酸的精補(bǔ)料,經(jīng)過150 d育肥試驗(yàn)之后全部屠宰測(cè)定�！窘Y(jié)果】飼喂增重凈能5.90和5.69 MJ/kg精補(bǔ)料的雜交肉牛全期總增量分別為217.40和214.20 kg,凈肉增量分別為106.76和104.37 kg,料重比分別為4.03和4.08,料肉比分別為8.21和8.37;飼喂增重凈能5.27和5.48 MJ/kg精補(bǔ)料的雜交肉牛全期總增量分別為184.20和192.20 kg,凈肉增量分別為85.85和89.56 kg,料重比分別為4.71和4.57,料肉比分別為10.10和9.80;飼喂增重凈能5.90和5.69 MJ/kg精補(bǔ)料的雜交肉牛單位體增量成本比增重凈能5.27和5.48 MJ/kg的平均降低11.71%,單位凈肉增量成本平均降低17.33%;飼喂增重凈能5.27 MJ/kg精補(bǔ)料的各項(xiàng)試驗(yàn)指標(biāo)最差(P0.05,P0.01)。隨著增重凈能濃度增加,雜交肉牛血清葡萄糖、甘油三酯和尿素氮濃度升高,而β-羥丁酸和總蛋白濃度下降(P0.05,P0.01)。所有差異均來自一元線性效應(yīng)�！窘Y(jié)論】在蛋白質(zhì)和必需氨基酸濃度相同條件下,增加增重凈能濃度明顯提高雜交肉牛育肥和產(chǎn)肉性能、體增量和凈肉增量的飼料效率和效益、及相應(yīng)的血清代謝物濃度,增重凈能是育肥肉牛的重要營養(yǎng)指標(biāo)。
[Abstract]:[objective] to study the fattening performance and meat production benefit of crossbred beef cattle by preparing fine feed with different weight gain net energy concentration. [methods] 40 Simmental cattle with similar body weight were selected and their body weight was 400.8 鹵32.1 kg. Crossbred beef cattle were randomly divided into 4 experimental groups. Four groups of crossbred beef cattle were fed with the same protein and essential amino acids, which increased from 5.27MJ/kg to 5.90 MJ/kg in the same gradient. After 150-day fattening experiment, all slaughter tests were carried out. [results] the total increment of whole period, net meat increment and feed weight ratio of crossbred beef cattle fed with 5.90 and 5.69 MJ/kg refined feed were 217.40 and 214.20 kg, 106.76 and 104.37 kg respectively, the feed weight ratio were 4.03 and 4.03 respectively. 4.08, the feed to meat ratio was 8.21 and 8.37, the total increment of net energy 5.27 and 5.48 MJ/kg fine feed was 184.20 and 192.20 kg, the net meat increment was 85.85 and 89.56 kg, the feed weight ratio was 4.71 and 4.57, the feed and meat ratio were 10.10 and 9.80 respectively. The increment cost per unit body of crossbred beef cattle fed with 5.90 and 5.69 MJ/kg refined feedstock decreased 11.71% and 17.33%, respectively, compared with 5.27 and 5.48 MJ/kg of net energy gain, and the lowest test index was P0.05P0.01 when fed with 5.27 MJ/kg refined feed. The concentration of serum glucose, triglyceride and urea nitrogen increased with the increase of net energy concentration, while the concentration of 尾 -hydroxybutyric acid and total protein decreased P0.05 and P0.01. [conclusion] under the same concentration of protein and essential amino acid, the increase of net energy concentration of weight gain significantly improved the feed efficiency and benefit of crossbred beef cattle in fattening and meat production, body increment and net meat increment. Serum metabolite concentration and net energy gain were important nutritional indexes for fattening beef cattle.
【作者單位】： 山東省農(nóng)業(yè)科學(xué)院畜牧獸醫(yī)研究所;山東省畜禽疫病防治與繁育重點(diǎn)實(shí)驗(yàn)室;濰坊市坊子區(qū)園璽養(yǎng)殖專業(yè)合作社;
【基金】：山東省現(xiàn)代農(nóng)業(yè)產(chǎn)業(yè)技術(shù)體系創(chuàng)新團(tuán)隊(duì)建設(shè)項(xiàng)目(SDAIT-09-07) 現(xiàn)代農(nóng)業(yè)(肉牛牦牛)產(chǎn)業(yè)技術(shù)體系建設(shè)專項(xiàng)資金(CARS-38)
【分類號(hào)】：S823.5
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本文編號(hào)：1927878