本文選題：灘羊 + 能量蛋白��； 參考：《西北農(nóng)林科技大學》2015年碩士論文

【摘要】：本研究通過飼養(yǎng)試驗初步探討了不同能量和蛋白水平日糧對寧夏灘羊生長性能、養(yǎng)分消化率、血液生化指標以及經(jīng)濟效益的影響,從而為灘羊舍飼高效育肥技術提供理論依據(jù)。試驗選用健康狀況良好,體重相近的4月齡左右灘羊112只,采用單因子隨機試驗設計,隨機分為4個處理組,每個處理組4個重復(2個公羊重復組和2個母羊重復組),每個重復7只羊。試驗根據(jù)增重目標分為3個階段:22~28 kg,29~35 kg,36~40 kg。試驗日糧營養(yǎng)水平參考肉羊飼養(yǎng)標準(NY/T816-2004),第一階段按體重22 kg,日增重200 g育肥羔羊營養(yǎng)需要為標準,試驗1組DE:7.92 MJ/kg,CP:9.90%;試驗2組DE:9.05 MJ/kg,CP:11.32%;試驗3組DE:10.19 MJ/kg,CP:12.73%;試驗4組DE:11.32 MJ/kg,CP:14.15%。第二階段按體重29 kg,日增重200 g育肥羔羊營養(yǎng)需要為標準,試驗1組DE:7.45 MJ/kg,CP:8.28%;試驗2組DE:8.52 MJ/kg,CP:9.46%;試驗3組DE:9.58 MJ/kg,CP:10.65%;試驗4組DE:10.65 MJ/kg,CP:11.83%。第三階段按體重36 kg,日增重200 g育肥羔羊營養(yǎng)需要為標準,試驗1組DE:7.08 MJ/kg,CP:8.04%;試驗2組DE:8.09 MJ/kg,CP:9.19%;試驗3組DE:9.10 MJ/kg,CP:10.34%;試驗4組DE:10.11 MJ/kg,CP:11.49%。每個階段設置84%標準、96%標準、108%標準和120%標準營養(yǎng)水平日糧。在每個階段飼養(yǎng)試驗末期采用全收糞法進行為期10 d(前7 d為預試期)的消化代謝試驗,每個階段結(jié)束時對試驗羊用一次性采血針進行頸靜脈采血。試驗結(jié)果表明:(1)第一階段,平均日增重試驗4組比試驗3組高12.80%(P0.05),比試驗2組高27.96%(P0.01),比試驗1組高31.77%(P0.01)。第二階段,試驗4組比3組高15.66%(P0.05),比試驗2組高21.36%(P0.05),比試驗1組高34.73%(P0.05)。第三階段,試驗4組比試驗3組高22.10%(P0.05),比試驗2組高33.60%(P0.05),比試驗1組高41.46%(P0.05)。隨著日糧營養(yǎng)水平的升高,灘羊的日增重逐漸增加,日采食量先上升后下降,而料肉比呈下降趨勢。(2)隨著日糧營養(yǎng)水平的提高,每個試驗階段灘羊體高、管圍、胸圍、體斜長、尾寬、尾長和尾基部的平均日增長逐漸增加,其中體高、胸圍、體斜長和尾部變化明顯。每個試驗階段營養(yǎng)水平最高組即試驗4組增長最快,效果較好。(3)第一階段,養(yǎng)分消化率試驗4組CP比試驗3組高5.71%(P0.05),比試驗2組高12.01%(P0.05),比試驗1組高21.75%(P0.05);試驗4組GE比試驗3組高8.76%(P0.05),比試驗2組高20.96%(P0.01),比試驗1組高25.62%(P0.01)。第二階段,試驗4組CP比試驗3組高8.35%(P0.05),比試驗2組高9.49%(P0.05),比試驗一組高18.47%(P0.05);試驗4組GE比試驗3組高12.41%(P0.05),比試驗2組高8.29%(P0.05),比試驗1組高18.02%(P0.01)。第三階段,試驗4組CP比試驗3組高3.47%(P0.05),比試驗2組高8.04%(P0.05),比試驗1組高15.27%(P0.05);試驗4組GE比試驗3組高14.14%(P0.01),比試驗2組高18.25%(P0.01),比試驗1組高24.90%(P0.01)。每個試驗階段DM、CP、GE、NDF和ADF養(yǎng)分消化率隨著日糧營養(yǎng)水平的升高而增加。(4)每個試驗階段血清中TP、GLU和TC各組之間存在差異,其他指標各組之間差異不顯著。隨著日糧營養(yǎng)水平的提高,血清BUN和GLU指標逐漸增大。血清激素濃度隨營養(yǎng)水平的提高呈上升趨勢。(5)第一階段,試驗4組毛收益比試驗3組高0.66元(P0.05),比試驗2組高1.48元(P0.05),比試驗1組高1.52元(P0.05)。第二階段,試驗4組比試驗3組高0.7元(P0.05),比試驗2組高0.59元(P0.05),比試驗1組高1.55元(P0.05)。第三階段,試驗4組比試驗3組高0.85元(P0.05),比試驗2組高1.33元(P0.05),比試驗1組高0.92元(P0.05)。每個試驗階段隨著日糧營養(yǎng)水平的提高增重效益和毛收益逐漸增加。(6)在本試驗條件下,每個試驗階段的營養(yǎng)水平最高組試驗4組育肥效果最好,效益最高,即120%標準營養(yǎng)水平日糧。第一階段:DE:11.32 MJ/kg,CP:14.15%;第二階段:DE:10.65 MJ/kg,CP:11.83%;第三階段:DE:10.11 MJ/kg,CP:11.49%。
[Abstract]:In this study, the effects of different energy and protein levels on the growth performance, nutrient digestibility, blood biochemical indexes and economic benefits of Ningxia beach sheep were preliminarily studied in this study, so as to provide a theoretical basis for the high efficient fattening technology of the beach sheep. The experiment selected about 4 month old beach sheep with good health condition and close weight, 112 The single factor randomized trial was designed and divided randomly into 4 treatment groups, each treated group with 4 repetitions (2 rams repeats and 2 ewes repeated groups), each repeated 7 sheep. The experiment was divided into 3 stages according to the weight gain target: 22~28 kg, 29~35 kg, 36~40 kg. test diet nutrition level reference to meat sheep feeding standard (NY/T816-2004), and the first stage according to weight 2. 2 kg, daily weight gain 200 g fattening lamb nutrition needs as the standard, test 1 groups of DE:7.92 MJ/kg, CP:9.90%; test 2 groups of DE:9.05 MJ/kg, CP:11.32%; test 3 DE:10.19 MJ/kg, CP:12.73%; 4 groups DE:11.32, second stages according to weight 29, daily weight gain 200 fat lamb nutrition needs as the standard, 1 sets of experiments; 1 Test 2 groups of DE:8.52 MJ/kg, CP:9.46%, test 3 groups of DE:9.58 MJ/kg, CP:10.65%, test 4 groups of DE:10.65 MJ/kg, CP:11.83%. third stage according to body weight 36 kg, daily weight gain 200 g fattening lamb nutrition requirements, experiment 1 DE:7.08, 2 groups, 4 groups Kg, CP:11.49%. set 84% standard, 96% standard, 108% standard, and 120% standard nutrition level diet at each stage. At the end of each stage, full feces method was used to carry out the digestion and metabolism test for 10 d (pre 7 d pre trial period). At the end of each stage, the experimental sheep used the primary blood collection needle for the jugular vein blood collection. The results showed: (1) ) in the first stage, the average daily weight gain test was 12.80% (P0.05) higher than the test 3 group, 27.96% (P0.01) higher than that of the test group, 31.77% (P0.01) higher than the test 1 group (P0.01). The second stage was higher than the 3 group, and the 4 group was higher than the 3 group (P0.05), higher than the experimental 2 group (P0.05), and higher than the experimental group (P0.05). The test group was higher than the experimental group (P0.05), and compared with the experiment. The height of 33.60% (P0.05) was 41.46% (P0.05) higher than that of the test 1. With the increase of dietary nutrition level, the daily weight gain of the beaches increased gradually, the daily feed intake first rose and then declined, while the ratio of feed to meat decreased. (2) with the increase of dietary nutrition level, the body height, tube circumference, length of body, tail width, tail length and tail base of each test stage were higher. The average daily growth increased gradually, including body height, chest circumference, body slope length and tail change obviously. The highest level of nutrition in each test stage was the fastest growth and better effect. (3) the first stage, the nutrient digestibility test 4 groups CP CP ratio test 3 higher 5.71% (P0.05), higher than the test 2 group 12.01% (P0.05), 21.75% (P0.05) higher than the test 1 group (P0.05); Experiment 4 GE A higher 8.76% (P0.05) than the test group was 20.96% (P0.01) higher than the test group (P0.01), 25.62% (P0.01) higher than the test 1. The 4 groups of CP were 8.35% (P0.05) higher than the experimental 3 group (P0.05), higher than the experimental group 2, and 2 higher than the test group (P0.05); the experimental group of GE was higher than the test group (P0.05), higher than the test group (P0.05), and higher than the test group (P). 0.01. In the third stage, the 4 groups of CP in the test group were 3.47% (P0.05) higher than those in the test group, 8.04% (P0.05) higher than the 2 group (P0.05), and 4 groups of GE higher than the experimental group 3, 14.14% (P0.01), higher than the experimental 2 groups (P0.01), higher than those of the experimental group (P0.01). (4) there was a difference between TP, GLU and TC in each test stage, and the difference between the other indexes was not significant. With the increase of dietary nutrition level, the serum BUN and GLU index increased gradually. The serum hormone concentration increased with the increase of nutrition level. (5) the first stage, the 4 groups of wool yield compared with the test group 3 higher. 0.66 yuan (P0.05) was 1.48 yuan (P0.05) higher than that of the test group, 1.52 yuan (P0.05) higher than test 1. The 4 groups were 0.7 yuan (P0.05) higher than the test 3, higher than 2 group (P0.05) and 1.55 yuan (P0.05) higher than test 2 (P0.05). The experimental group was higher than the experimental group (P0.05), and higher than the test group (P0.05), which was higher than the test group. Yuan (P0.05). The benefit of weight gain and gross profit increased gradually with the increase of dietary nutrition level in each experimental stage. (6) under the conditions of this experiment, the best nutrition level of the 4 groups in each test stage was the best, that is, the 120% standard nutrition level diet. The first stage: DE:11.32 MJ/kg, CP:14.15%; the second stage: DE:10.65 MJ/kg, CP:11.83%; third stage: DE:10.11 MJ/kg, CP:11.49%.
【學位授予單位】：西北農(nóng)林科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：S826.5

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