本文選題：舍飼灘羊 + 異食癖�。� 參考：《寧夏大學(xué)》2015年碩士論文

【摘要】：本試驗結(jié)合生產(chǎn)性能、瘤胃內(nèi)環(huán)境、血液生化、羊毛物理化學(xué)及尿液指標(biāo),研究低蛋白水平造成舍飼灘羊異食癖的發(fā)生機(jī)理,在此基礎(chǔ)上通過給異食癖灘羊飼喂?fàn)I養(yǎng)全面的平衡日糧,在試驗條件下研究營養(yǎng)調(diào)控的實際效果。試驗分兩部分：試驗一：低蛋白水平造成舍飼灘羊異食癖發(fā)生機(jī)理研究選取裝有永久性瘤胃瘺管的健康灘羊羯羊12只,采用單因素完全隨機(jī)試驗設(shè)計,飼喂低蛋白水平的日糧,以建立其異食癖模型。異食癖灘羊為試驗組,其日糧維生素、礦物質(zhì)參照NRC綿羊飼養(yǎng)標(biāo)準(zhǔn)和內(nèi)蒙古細(xì)毛羊(4-18月齡)飼養(yǎng)標(biāo)準(zhǔn)配制,粗蛋白水平分別為營養(yǎng)需要的2/3(試驗Ⅰ組)和1/2(試驗Ⅱ組)。非異食癖灘羊為對照組,其日糧參照飼養(yǎng)標(biāo)準(zhǔn)配制。結(jié)果表明：低蛋白水平造成舍飼灘羊異食癖時,羊只干物質(zhì)采食量(DMI)與增重呈下降趨勢,料重比極顯著增加(P0.01)；蛋白水平低至1/2時粗蛋白(CP)表觀消化率、氮利用率極顯著降低(P0.01)；瘤胃氨氮(NH3-N)濃度、瘤胃總揮發(fā)性脂肪酸(VFA)及乙酸含量極顯著減少(P0.01),試驗Ⅱ組丙酸、丁酸含量極顯著減少(P0.01);血清總蛋白(TP)水平極顯著下降(P0.01),血清尿素氮(BUN)含量顯著減少(P0.05)；羊毛生長速度減緩,羊毛密度呈下降趨勢,但差異不顯著(P0.05),羊毛硫沉積量顯著減少(P0.05);尿氮極顯著低于對照組(P0.01),尿中鋅含量呈下降趨勢,而尿液PH及尿中銅的含量無明顯變化。舍飼灘羊發(fā)生異食癖時,可通過瘤胃NH3-N、VFA,血清TP、血清BUN,羊毛長度增長、羊毛密度、羊毛中硫含量以及尿氮的檢測,判斷分析是否是由日糧蛋白質(zhì)缺乏引起的。試驗二：舍飼灘羊異食癖營養(yǎng)調(diào)控技術(shù)研究通過營養(yǎng)檢測技術(shù)確定舍飼灘羊發(fā)生異食癖的主要因素,將所選16只異食癖灘羊隨機(jī)分為兩組,每組8只,試驗組日糧參照NRC綿羊飼養(yǎng)標(biāo)準(zhǔn)和內(nèi)蒙古細(xì)毛羊(4-18月齡)飼養(yǎng)標(biāo)準(zhǔn)配制為營養(yǎng)全面的平衡日糧,另一組飼喂原有的營養(yǎng)不全面的日糧作為對照,在試驗條件下研究營養(yǎng)調(diào)控的實際效果。結(jié)果表明：試驗組的末重、日增重、DMI均極顯著的高于對照組(P0.01),其中日增重達(dá)到了對照組的兩倍,且試驗組的料重比極顯著的低于對照組(P0.01)；試驗組的血清TP、BUN含量呈極顯著水平提高(P0.01),Glu含量顯著高于對照組(P0.05)；試驗組的羊毛生長速度較對照組加快,羊毛密度顯著高于對照組(P0.05)；試驗組羊毛硫含量極顯著的高于對照組(P0.01),且均提高到2%以上,羊毛銅、鋅含量呈增加趨勢,試驗后期羊毛鋅含量顯著高于對照組(P0.05)；試驗組的尿氮含量顯著高于對照組(P0.01),但試驗組的氮利用率優(yōu)于對照組。說明通過營養(yǎng)調(diào)控能有效防治灘羊異食癖,改善異食癖灘羊體況。
[Abstract]:In this study, the production performance, rumen environment, blood biochemistry, wool physicochemistry and urine index were used to study the mechanism of transfestation caused by low protein level. On this basis, the actual effect of nutritional regulation was studied under the experimental conditions by feeding the transvestite Tan sheep with a balanced diet with comprehensive nutrition. The experiment was divided into two parts: experiment 1: study on the mechanism of transvestibility in Sheep caused by low protein level; 12 healthy Tan Sheep with permanent Rumen Fistula were selected and fed diets with low protein level by a single factor complete randomized trial design. To establish its transvestite model. The dietary vitamins and minerals were formulated according to the feeding standards of NRC sheep and Inner Mongolia fine wool sheep. The crude protein levels were 2 / 3 (group I) and 1 / 2 (group 鈪，

本文編號：1817220