不同能量和蛋白水平日粮对滩羊生长性能、养分消化率和经济效益的影响

发布时间：2018-06-19 00:02

本文选题：滩羊 + 能量蛋白　；参考：《西北农林科技大学》2015年硕士论文

【摘要】：本研究通过饲养试验初步探讨了不同能量和蛋白水平日粮对宁夏滩羊生长性能、养分消化率、血液生化指标以及经济效益的影响,从而为滩羊舍饲高效育肥技术提供理论依据。试验选用健康状况良好,体重相近的4月龄左右滩羊112只,采用单因子随机试验设计,随机分为4个处理组,每个处理组4个重复(2个公羊重复组和2个母羊重复组),每个重复7只羊。试验根据增重目标分为3个阶段:22~28 kg,29~35 kg,36~40 kg。试验日粮营养水平参考肉羊饲养标准(NY/T816-2004),第一阶段按体重22 kg,日增重200 g育肥羔羊营养需要为标准,试验1组DE:7.92 MJ/kg,CP:9.90%;试验2组DE:9.05 MJ/kg,CP:11.32%;试验3组DE:10.19 MJ/kg,CP:12.73%;试验4组DE:11.32 MJ/kg,CP:14.15%。第二阶段按体重29 kg,日增重200 g育肥羔羊营养需要为标准,试验1组DE:7.45 MJ/kg,CP:8.28%;试验2组DE:8.52 MJ/kg,CP:9.46%;试验3组DE:9.58 MJ/kg,CP:10.65%;试验4组DE:10.65 MJ/kg,CP:11.83%。第三阶段按体重36 kg,日增重200 g育肥羔羊营养需要为标准,试验1组DE:7.08 MJ/kg,CP:8.04%;试验2组DE:8.09 MJ/kg,CP:9.19%;试验3组DE:9.10 MJ/kg,CP:10.34%;试验4组DE:10.11 MJ/kg,CP:11.49%。每个阶段设置84%标准、96%标准、108%标准和120%标准营养水平日粮。在每个阶段饲养试验末期采用全收粪法进行为期10 d(前7 d为预试期)的消化代谢试验,每个阶段结束时对试验羊用一次性采血针进行颈静脉采血。试验结果表明:(1)第一阶段,平均日增重试验4组比试验3组高12.80%(P0.05),比试验2组高27.96%(P0.01),比试验1组高31.77%(P0.01)。第二阶段,试验4组比3组高15.66%(P0.05),比试验2组高21.36%(P0.05),比试验1组高34.73%(P0.05)。第三阶段,试验4组比试验3组高22.10%(P0.05),比试验2组高33.60%(P0.05),比试验1组高41.46%(P0.05)。随着日粮营养水平的升高,滩羊的日增重逐渐增加,日采食量先上升后下降,而料肉比呈下降趋势。(2)随着日粮营养水平的提高,每个试验阶段滩羊体高、管围、胸围、体斜长、尾宽、尾长和尾基部的平均日增长逐渐增加,其中体高、胸围、体斜长和尾部变化明显。每个试验阶段营养水平最高组即试验4组增长最快,效果较好。(3)第一阶段,养分消化率试验4组CP比试验3组高5.71%(P0.05),比试验2组高12.01%(P0.05),比试验1组高21.75%(P0.05);试验4组GE比试验3组高8.76%(P0.05),比试验2组高20.96%(P0.01),比试验1组高25.62%(P0.01)。第二阶段,试验4组CP比试验3组高8.35%(P0.05),比试验2组高9.49%(P0.05),比试验一组高18.47%(P0.05);试验4组GE比试验3组高12.41%(P0.05),比试验2组高8.29%(P0.05),比试验1组高18.02%(P0.01)。第三阶段,试验4组CP比试验3组高3.47%(P0.05),比试验2组高8.04%(P0.05),比试验1组高15.27%(P0.05);试验4组GE比试验3组高14.14%(P0.01),比试验2组高18.25%(P0.01),比试验1组高24.90%(P0.01)。每个试验阶段DM、CP、GE、NDF和ADF养分消化率随着日粮营养水平的升高而增加。(4)每个试验阶段血清中TP、GLU和TC各组之间存在差异,其他指标各组之间差异不显著。随着日粮营养水平的提高,血清BUN和GLU指标逐渐增大。血清激素浓度随营养水平的提高呈上升趋势。(5)第一阶段,试验4组毛收益比试验3组高0.66元(P0.05),比试验2组高1.48元(P0.05),比试验1组高1.52元(P0.05)。第二阶段,试验4组比试验3组高0.7元(P0.05),比试验2组高0.59元(P0.05),比试验1组高1.55元(P0.05)。第三阶段,试验4组比试验3组高0.85元(P0.05),比试验2组高1.33元(P0.05),比试验1组高0.92元(P0.05)。每个试验阶段随着日粮营养水平的提高增重效益和毛收益逐渐增加。(6)在本试验条件下,每个试验阶段的营养水平最高组试验4组育肥效果最好,效益最高,即120%标准营养水平日粮。第一阶段:DE:11.32 MJ/kg,CP:14.15%;第二阶段:DE:10.65 MJ/kg,CP:11.83%;第三阶段: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%.
【学位授予单位】：西北农林科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S826.5

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