Chinese Journal of Animal Nutrition >

2023 , Vol. 35 >Issue 6: 3791 - 3799

DOI: https://doi.org/10.12418/CJAN2023.352

RESEARCH PAPER

Effects of Replacing Corn Flour with Corn Gluten on Growth and Development, Feeding and Digestion, Slaughter Performance, Serum Biochemical Indexes and Meat Quality of Goats

  • ZHANG Fan , 1, 2 ,
  • WANG Rong 2 ,
  • WEN Jiangnan 2 ,
  • ZHANG Xiumin 2 ,
  • ZHENG Chen , 1, * ,
  • WANG Min , 2, *
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  • 1 College of Animal Science and Technology, Gansu Agricultural University, Lanzhou 730070, China
  • 2 Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
*ZHENG Chen, professor, E-mail: ;
WANG Min, professor, E-mail:

Received date: 2022-11-23

  Online published: 2023-06-08

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Abstract

This experiment was conducted to investigate the effects of replacing corn flour with corn gluten on growth and development, feeding and digestion, slaughter performance, serum biochemical indexes and meat quality of goats. Twenty-four healthy 9-month-old Xiangdong black goats with similar body weight were randomly divided into 2 groups with 12 goats in each group. The goats in the corn flour group were fed a basal diet, and the goats in the corn gluten group were fed the experimental diet with corn gluten completely replacing corn flour. The pre-experimental period lasted for 10 days, and the experimental period lasted for 80 days. The results showed as follows: 1) there were no significant differences in initial value and final value of body weight, body height, body oblique length, heart girth, rump length, hip cross height of goats between corn flour group and corn gluten group (P>0.05). 2) Compared with corn flour group, the apparent digestibility of organic matter, starch and gross energy of goats of corn gluten group was significantly decreased (P<0.05), and the apparent digestibility of crude protein, neutral detergent fiber and acid detergent fiber was significantly increased (P<0.05). 3) Compared with corn flour group, the serum albumin content of goats of corn gluten group was significantly decreased (P<0.05), the serum urea content was significantly increased (P<0.05), and other serum biochemical indexes were no significant differences (P>0.05). 4) There were no significant effects in loin eye area, backfat thickness and weight and indexes of heart, liver, spleen, lung and kidney of goats between corn flour group and corn gluten group (P>0.05). 5) There were no significant effects in meat color, pH45 min, pH24 h, shear force, water loss rate, water holding capacity and cooked meat rate of longissimus dorsi, gluteus medius and vastus lateralis between corn flour group and corn gluten group (P>0.05). In conclusion, replacing corn flour with corn gluten has no adverse effects on the growth performance, slaughter performance and meat quality of goats, which indicates that corn gluten can be used as feedstuff in goat feeding.

Key words： corn gluten; Xiangdong black goat; growth performance; slaughter performance; meat quality

Cite this article

ZHANG Fan , WANG Rong , WEN Jiangnan , ZHANG Xiumin , ZHENG Chen , WANG Min . Effects of Replacing Corn Flour with Corn Gluten on Growth and Development, Feeding and Digestion, Slaughter Performance, Serum Biochemical Indexes and Meat Quality of Goats[J]. Chinese Journal of Animal Nutrition, 2023 , 35(6) : 3791 -3799 . DOI: 10.12418/CJAN2023.352

根据海关总署公布的数据显示,中国2020年进口玉米1 129.4万t,同比增长135.9%,创历史新高[1]。养殖业是我国玉米消费的主要渠道,约占玉米总消费量的60%[2]。目前,除了畜牧业养殖需要消耗玉米,酒精和淀粉生产也需要大量的玉米作为生产原料,因此,寻求其他饲料原料代替玉米已经成为畜牧业发展的必然之路。喷浆玉米皮是湿法碾磨玉米籽粒生产淀粉的重要副产物,是用玉米浸泡液喷洒到玉米皮上制作而成[1⇓-3],富含纤维和蛋白质等营养成分[4-5],而且价格相对玉米粉更加便宜,因此喷浆玉米皮具有作为饲料原料广泛应用于畜牧业生产中的潜力。曾绘锦等[6]研究发现,肉兔对喷浆玉米皮中蛋白质和氨基酸的消化率较高,并指出喷浆玉米皮可以作为肉兔的非常规饲料原料。除此之外,在高精料饲粮条件下,喷浆玉米皮替代玉米粉有助于维持瘤胃内环境,避免瘤胃pH过低而导致亚急性瘤胃酸中毒[7]。喷浆玉米皮与玉米粉在淀粉和纤维含量上具有明显的差异,而饲粮淀粉和纤维含量往往会影响山羊生长性能、屠宰性能和肉品质[8⇓⇓-11]。因此,本试验旨在探讨喷浆玉米皮替代玉米粉对湘东黑山羊生长发育、采食和消化、屠宰性能、血清生化指标及肉品质的影响,为喷浆玉米皮在山羊生产中的应用提供数据支撑。

1 材料与方法

1.1 试验设计

选用24只体况良好、体重接近的9月龄雄性湘东黑山羊作为试验动物,采用完全随机试验设计分为2组,每组12只。玉米粉组饲喂基础饲粮,喷浆玉米皮组饲喂以喷浆玉米皮替代玉米粉的试验饲粮。试验饲粮组成及营养水平见表1。
表1 饲粮组成及营养水平(干物质基础)

Table 1 Composition and nutrient levels of diets (DM basis)%

项目
Items		 组别 Groups
玉米粉
Corn flour		 喷浆玉米皮
Corn gluten
原料 Ingredients
花生藤 Peanut vine 25.0 25.0
喷浆玉米皮 Corn gluten 55.0
玉米粉 Corn meal 55.0
豆粕 Soybean meal 13.0 13.0
麦麸 Wheat bran 3.0 3.0
食盐 NaCl 5.0 5.0
碳酸钙 CaCO3 2.0 2.0
磷酸二氢钙 Ca(H2PO4)2 8.0 8.0
玉米油 Corn oil 5.0 5.0
预混料 Premix1) 2.0 2.0
合计 Total 100.0 100.0
营养水平 Nutrient levels2)
有机物 OM 90.8 89.4
粗蛋白质 CP 11.1 17.4
中性洗涤纤维 NDF 27.3 44.9
酸性洗涤纤维 ADF 11.9 17.2
淀粉 Starch 39.1 12.9
总能 GE/(MJ/kg) 14.8 15.3

1)每千克预混料含有 One kilogram of premix contained the following:VA 333 mg,胆钙化醇 cholecalciferol 5 mg,α-生育酚 alpha-tocopherol 838 mg,Zn 922 mg,Se 56 mg,I 2 247 mg,Fe 1 377 mg,Co 227 mg,Mn 2 196 mg,Cu 889 mg。

2)实测值 Measured values。

1.2 饲养管理

试验在中国科学院亚热带农业生态研究所进行,试验山羊单独饲喂在代谢笼内,每天饲喂2次,分别在08:00和18:00,自由饮水。每天清扫圈舍,保持圈舍干净。整个试验持续90 d,其中,预试期10 d,正试期80 d。预试期内,逐渐调整山羊的饲粮结构,记录每只山羊每天的采食量,将剩料控制在5%之内,以尽量减少山羊对饲粮的选择,为正试期的饲喂量提供参考。

1.3 样品采集和指标测定

正试期第1天晨饲前对所有试验山羊的体重、体斜长、体高、胸围、尻长和荐高进行测量,记录为初始值。正试期第75~79天对所有试验山羊进行全收粪,每天记录饲喂量和剩料量,称取2份10%的粪样,一份样品用10% H2SO4进行酸化,防止粪样中氮的损失,然后在-20 ℃冷冻保存;另一份未酸化处理的样品直接置于-20 ℃冷冻保存。所有剩料、饲粮和粪样在鼓风干燥烘箱内65 ℃烘干48 h,然后用粉碎机对烘干后的样品进行粉碎,并过1 mm筛,最后置于封口袋保存,待测。
利用凯氏定氮法对酸化处理的粪样粗蛋白质(CP)含量进行测定,参考AOAC(2012)[12]方法对饲粮和粪样干物质(DM)和有机物(OM)含量进行测定,参考Van Soest等[13]方法对饲粮和粪样中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)含量进行测定,利用等温自动量热计(5E-AC8018,长沙开元仪器有限公司)对饲粮和粪样的总能进行测定。
正试期第80天晨饲前对所有试验山羊进行颈静脉采血,所有血液样品静置30 min后置于离心机,在3 500 r/min条件下离心5 min,然后将上清液转移到1.5 mL无菌无酶的离心管,置于-20 ℃保存备用。采用全自动生化分析仪(CX-4,美国Beckman公司)对相关的血清生化指标进行测定,所用试剂盒均购自南京建成生物工程研究所。随后记录山羊的宰前活重、体斜长、体高、胸围、尻长和荐高,记录为终末值,然后在指定地点放血屠宰,除去头、蹄、血液、毛皮和内脏后称量并记录胴体重。最后分离脏器和肠道,测定各个脏器部位的重量,其中眼肌面积和器官指数的计算方式参考刘树林等[14]。选择背最长肌、臀中肌和股外侧肌3个部位的肌肉样品进行肉品质测定,具体测定步骤参考张小强等[15]和《畜禽肉质的测定》(NY/T 1333—2007)的方法。

1.4 数据分析

试验数据用Excel 2013初步记录并做简单处理,然后采用SPSS 21.0软件的一般线性模型进行方差分析(ANOVA),以饲粮为固定因子,山羊个体为随机因子。结果用“平均值±标准误”(mean±SD)表示,P<0.05表示差异显著,0.05≤P<0.10表示升高或降低的变化趋势,P≥0.10表示差异不显著。

2 结果

2.1 喷浆玉米皮替代玉米粉对山羊体重和体尺指标的影响

由表2可知,玉米粉组和喷浆玉米皮组之间山羊的体重、体高、体斜长、胸围、尻长和荐高的初始值和终末值均没有显著差异(P>0.05)。
表2 喷浆玉米皮替代玉米粉对山羊体重和体尺指标的影响

Table 2 Effects of replacing corn flour with corn gluten on body weight and body size of goats

项目
Items		 组别 Groups P值
P-value
玉米粉 Corn flour 喷浆玉米皮 Corn gluten
体重 Body weight/kg
初始值 Initial value 17.37±1.40 17.76±1.84 0.59
终末值 Final value 21.62±1.19 21.01±1.34 0.28
体高 Body height/cm
初始值 Initial value 50.49±2.78 49.63±2.55 0.46
终末值 Final value 52.34±2.62 52.14±2.03 0.84
体斜长 Body oblique length/cm
初始值 Initial value 53.04±2.80 54.15±3.30 0.41
终末值 Final value 57.58±3.27 57.54±3.22 0.98
胸围 Heart girth/cm
初始值 Initial value 59.24±3.58 59.43±2.89 0.89
终末值 Final value 66.59±2.79 66.19±3.08 0.75
尻长 Rump length/cm
初始值 Initial value 18.03±1.92 17.68±0.96 0.60
终末值 Final value 20.21±1.53 19.31±1.33 0.16
荐高 Hip cross height/cm
初始值 Initial value 51.07±2.79 50.79±3.18 0.83
终末值 Final value 52.75±3.26 53.39±2.48 0.61
体重或体尺增加 Increased of body weight or body size
体重 Body weight/kg 4.25±1.31 3.25±1.72 0.14
体高 Body height/cm 1.85±0.83 2.51±1.76 0.27
体斜长 Body oblique length/cm 4.54±1.85 3.39±1.97 0.17
胸围 Heart girth/cm 7.35±3.13 6.76±3.16 0.66
尻长 Rump length/cm 2.19±1.24 1.64±1.28 0.32
荐高 Hip cross height/cm 1.68±1.28 2.60±1.99 0.21

2.2 喷浆玉米皮替代玉米粉对山羊采食量和营养物质表观消化率的影响

由表3可知,与玉米粉组相比,喷浆玉米皮组山羊的NDF、ADF和CP采食量显著提高(P<0.05),淀粉采食量显著降低(P<0.05),DM和OM采食量及总能摄入量无显著差异(P>0.05)。与玉米粉组相比,喷浆玉米皮组山羊的OM、淀粉和总能的表观消化率显著降低(P<0.05),CP、NDF和ADF的表观消化率显著提高(P<0.05)。
表3 喷浆玉米皮替代玉米粉对山羊采食量和营养物质表观消化率的影响

Table 3 Effects of replacing corn flour with corn gluten on feed intake and nutrient apparent digestibility of goats

项目
Items		 组别 Groups P值
P-value
玉米粉 Corn flour 喷浆玉米皮 Corn gluten
采食量 Feed intake
干物质 DM/(g/d) 521.57±14.37 530.14±16.37 0.21
有机物 OM/(g/d) 473.81±8.01 474.54±5.58 0.77
粗蛋白质 CP/(g/d) 80.67±1.36 105.67±1.24 <0.01
淀粉 Starch/(g/d) 263.00±4.44 69.80±0.82 <0.01
中性洗涤纤维 NDF/(g/d) 176.13±2.98 267.82±3.15 <0.01
酸性洗涤纤维 ADF/(g/d) 62.31±1.05 86.24±1.01 <0.01
总能 GE/(MJ/d) 7.54±0.34 7.72±0.45 0.31
表观消化率 Apparent digestibility
有机物 OM/‰ 787.57±13.93 724.80±8.02 <0.01
粗蛋白质 CP/‰ 742.65±32.33 799.76±8.56 <0.01
中性洗涤纤维 NDF/‰ 661.59±33.79 710.64±25.31 <0.01
酸性洗涤纤维 ADF/‰ 376.92±40.82 481.37±33.90 <0.01
淀粉 Starch/‰ 967.06±1.88 842.08±5.27 <0.01
总能 GE/% 73.00±1.73 67.04±0.92 <0.01

2.3 喷浆玉米皮替代玉米粉对山羊血清生化指标的影响

由表4可知,与玉米粉组相比,喷浆玉米皮组山羊的血清白蛋白含量显著降低(P<0.05),血清尿素含量显著升高(P<0.05),血清总蛋白含量呈现降低的变化趋势(P=0.06),血清肌酐、葡萄糖、甘油三酯、C反应蛋白含量和谷丙转氨酶、谷草转氨酶、碱性磷酸酶、乳酸脱氢酶、淀粉酶、脂肪酶、胰淀粉酶活性无显著差异(P>0.05)。
表4 喷浆玉米皮替代玉米粉对山羊血清生化指标的影响

Table 4 Effects of replacing corn flour with corn gluten on serum biochemical indexes of goats

项目
Items		 组别 Groups P值
P-value
玉米粉 Corn flour 喷浆玉米皮 Corn gluten
总蛋白 TP/(g/L) 75.33±2.00 72.71±3.94 0.06
白蛋白 ALB/(g/L) 37.31±1.86 34.89±1.63 <0.01
谷丙转氨酶 GPT/(U/L) 18.70±2.58 17.48±2.74 0.29
谷草转氨酶 GOT/(U/L) 68.79±15.92 62.08±9.82 0.25
碱性磷酸酶 ALP/(U/L) 386.89±58.54 362.75±61.19 0.36
乳酸脱氢酶 LDH/(U/L) 316.22±43.06 304.21±33.38 0.46
尿素 Urea/(mmol/L) 6.53±1.03 9.67±1.97 <0.01
肌酐 CRE/(μmol/L) 64.11±15.48 58.38±12.41 0.35
葡萄糖 GLU/(mmol/L) 4.42±0.64 4.15±0.61 0.31
甘油三酯 TG/(mmol/L) 0.41±0.19 0.39±0.19 0.77
淀粉酶 AMY/(U/L) 61.33±8.34 65.22±8.40 0.29
C反应蛋白 CRP/(mg/L) 4.36±0.02 4.36±0.03 0.81
脂肪酶 LIP/(U/L) 29.79±3.74 28.39±4.01 0.41
胰淀粉酶 Amylopsin/(U/L) 64.68±11.37 66.32±16.40 0.79

2.4 喷浆玉米皮替代玉米粉对山羊屠宰性能和器官指数的影响

由表5可知,玉米粉组和喷浆玉米皮组之间山羊的眼肌面积、背膘厚和心脏、肝脏、脾脏、肺脏、肾脏重量及其指数均无显著差异(P>0.05)。
表5 喷浆玉米皮替代玉米粉对山羊屠宰性能和器官指数的影响

Table 5 Effects of replacing corn flour with corn gluten on slaughter performance and organ indexes of goats

项目
Items		 组别 Groups P值
P-value
玉米粉 Corn flour 喷浆玉米皮 Corn gluten
屠宰性能 Slaughter performance
眼肌面积 Loin muscle area/cm2 4.24±1.22 3.84±1.12 0.44
背膘厚 Backfat thickness/cm 0.72±0.25 0.71±0.19 0.85
器官重量 Organ weight/g
心脏 Heart 97.53±9.91 93.74±7.03 0.31
肝脏 Liver 346.28±36.97 357.43±35.44 0.48
脾脏 Spleen 31.55±5.91 30.81±4.31 0.74
肺脏 Lung 256.05±23.21 253.32±23.31 0.79
肾脏 Kidney 59.39±4.33 58.86±4.32 0.78
器官指数 Organ indexes/‰
心脏 Heart 4.52±0.48 4.47±0.30 0.76
肝脏 Liver 16.09±2.11 17.05±1.77 0.26
脾脏 Spleen 1.46±0.27 1.47±0.23 0.92
肺脏 Lung 11.90±1.49 12.15±1.71 0.72
肾脏 Kidney 2.75±0.15 2.81±0.18 0.44

2.5 喷浆玉米皮替代玉米粉对山羊肉品质的影响

由表6可知,玉米粉组和喷浆玉米皮组之间山羊的背最长肌、臀中肌和股外侧肌的肉色、pH45 min、pH24 h、剪切力、滴水损失、系水力和熟肉率均无显著差异(P>0.05)。
表6 喷浆玉米皮替代玉米粉对山羊肉品质的影响

Table 6 Effects of replacing corn flour with corn gluten on meat quality of goats

项目
Items		 组别 Groups P值
P-value
玉米粉 Corn flour 喷浆玉米皮 Corn gluten
背最长肌 Longissimus dorsi
亮度 L* 42.02±2.03 43.35±3.01 0.24
红度 a* 17.09±2.32 17.68±2.06 0.53
黄度 b* 4.94±0.71 5.36±0.93 0.25
pH45 min 6.38±0.19 6.30±0.29 0.46
pH24 h 5.60±0.20 5.56±0.11 0.60
剪切力 Shear force/N 101.77±10.47 100.00±6.90 0.64
滴水损失 Water loss/% 13.17±1.33 13.56±1.44 0.52
系水力 Water holding capacity/% 90.75±3.09 91.92±2.71 0.35
熟肉率 Cooked meat rate/% 60.21±7.40 63.84±6.03 0.22
臀中肌 Gluteus medius
亮度 L* 41.64±2.36 43.08±2.59 0.19
红度 a* 20.52±1.74 19.70±1.34 0.23
黄度 b* 5.48±0.74 5.14±0.47 0.22
pH45 min 6.42±0.19 6.41±0.20 0.84
pH24 h 5.64±0.29 5.48±0.21 0.16
剪切力 Shear force/N 107.08±11.31 103.68±14.51 0.55
滴水损失 Water loss/% 9.25±0.69 9.15±0.74 0.74
系水力 Water holding capacity/% 91.48±2.74 92.23±3.01 0.54
熟肉率 Cooked meat rate/% 58.25±6.16 61.73±5.42 0.17
股外侧肌 Vastus lateralis
亮度 L* 42.95±2.91 42.74±1.62 0.84
红度 a* 18.83±0.85 18.85±1.57 0.97
黄度 b* 4.84±0.45 4.54±0.67 0.23
pH45 min 6.71±0.16 6.73±0.21 0.80
pH24 h 5.71±0.15 5.77±0.13 0.36
剪切力 Shear force/N 99.62±2.57 102.13±11.95 0.50
滴水损失 Water loss/% 10.66±2.52 11.05±1.27 0.65
系水力 Water holding capacity/% 92.12±2.04 92.66±2.07 0.55
熟肉率 Cooked meat rate/% 61.04±3.78 60.85±3.15 0.90

3 讨论

3.1 喷浆玉米皮替代玉米粉对山羊生长性能的影响

饲粮是影响反刍家畜生长性能的重要因素。研究表明,适当提高饲粮非纤维性碳水化合物和中性洗涤纤维比例(NFC/NDF),可以明显改善苏尼特断奶羔羊的生长状况,有效促进羔羊生长发育[16]。当NFC/NDF降低到0.12~0.13时,会降低阿尔巴斯白绒山羊羔羊的生长性能[14],这说明在山羊饲粮中增加NDF水平不利于改善生长性能。然而,在本试验结果中,喷浆玉米皮替代玉米粉对山羊生长性能无显著影响。宋晓雯等[17]研究表明,饲粮不同纤维水平对试验山羊净肉率、体长、体高、胸深、尻高、管围等均没有显著影响,这可能是因为在一定体重和生长阶段内,山羊生长性能是相对稳定的,受饲粮的影响不大。

3.2 喷浆玉米皮替代玉米粉对山羊营养物质采食和消化的影响

饲粮营养成分的表观消化率通常是反映动物对饲粮的利用效率,与玉米粉相比,喷浆玉米皮含有更多的纤维,利用喷浆玉米皮替代玉米粉可以提高饲粮纤维含量,降低淀粉含量。孙健[18]研究了玉米加工副产物在瘤胃内的降解特性,结果表明,喷浆玉米皮在瘤胃中的降解率较慢,如果在育肥牛饲粮中添加过多的玉米皮会降低育肥牛对营养物质降解的速率。同样,在De Morais等[3]的研究结果中,随着饲粮中喷浆玉米皮用量的增加,干物质降解率会呈现线性降低的变化趋势。与纤维相比,淀粉是更容易消化的碳水化合物,不仅可以被瘤胃微生物降解,还可以被动物本身的消化酶消化[19-20]。而纤维往往只能被微生物消化利用,纤维中存在的木质素会阻碍纤维素和半纤维素的降解,因此纤维的降解率往往低于淀粉[21⇓-23]。在本试验中,山羊采食喷浆玉米皮会显著提高纤维消化率,这可能是因为增加纤维摄入量会促进纤维降解类微生物的增殖,促进纤维消化降解,而淀粉摄入量增加会降低纤维消化率[20]。

3.3 喷浆玉米皮替代玉米粉对山羊血清生化指标的影响

血清中的尿素是蛋白质分解代谢后经过肝脏尿素循环产生的代谢产物,主要反映了机体蛋白质代谢情况[24]。在本研究结果中,饲喂喷浆玉米皮饲粮的山羊血清尿素含量显著升高,这可能是因为喷浆玉米皮替代玉米粉会增加饲粮中氮水平,当饲粮中氮水平过高时,会超出瘤胃微生物利用氮合成微生物蛋白的能力,从而导致氮的积累。血清中的蛋白质主要是维持血管内正常的渗透压和酸碱度,也反映了机体肝脏合成功能,其中白蛋白含量与机体的免疫力和抗病能力密切相关[25]。俞文靓等[26]研究表明,玉米皮能有效提高动物血清中白蛋白和总蛋白含量,这与本试验结果不一致,可能是与饲粮替代比例有关。De Morais等[3]研究结果表明,玉米皮在动物饲粮中的添加水平不宜超过20%,而在本研究中,喷浆玉米皮占饲粮比例的55%,这可能是导致结果不一致的重要原因。

3.4 喷浆玉米皮替代玉米粉对山羊屠宰性能、器官指数和肉品质的影响

研究表明,当饲粮NDF水平升高时,会降低阿尔巴斯白绒山羊羔羊屠宰性能和内脏器官的发育速度,增加胃肠道质量占体重的比例[14]。在本试验结果中,喷浆玉米皮替代玉米粉对山羊生长性能、屠宰性能和器官指数均无显著影响,这可能是因为屠宰性能和器官指数主要是由遗传因素决定,受饲粮组成的影响不大。肉色、pH、剪切力、滴水损失、系水力和熟肉率是衡量肉品质的重要指标。当提高荷斯坦青年公牛饲粮淀粉水平时,背最长肌的剪切力、失水率有降低的趋势,而系水力、粗脂肪含量有升高的趋势[27]。当提高育肥羔羊饲粮淀粉水平时,羔羊宰前活重、胴体重、净肉重、骨重和板油重均显著提高[28]。这说明提高饲粮淀粉水平有利于胴体脂肪的沉积,改善肉品质。然而,这与本试验结果不一致,这可能与试验动物所处时期有关。在本试验中,试验动物的肉品质可能已经处于稳定的生理阶段,不同饲粮对肉品质没有产生显著影响。

4 结论

在本试验条件下,山羊饲粮中使用喷浆玉米皮替代玉米粉对9月龄湘东黑山羊生长性能、屠宰性能和肉品质无不利影响,说明喷浆玉米皮能够作为饲料原料在山羊生产上使用,以减少玉米的使用。

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