This experiment was conducted to study the effects of adding coated xylanase and different levels of xylanase in wheat based diets on growth performance, nutrient metabolic rates and the development of immune and digestive organs of broilers. A total of 750 15-day-old Arbor Acres broilers (male and female polyculture) were randomly divided into 5 treatments with 5 replicates per treatment and 30 broilers per replicate. The control group was fed a wheat based diet, and test diets were added 10 000 U/g coated xylanase, 10 000, 20 000 and 30 000 U/g uncoated xylanase in the basal diet. The addition of xylanase was 150 g/t, and the test period was 28 days. The results show as follows: 1) the supplementation of 20 000 and 30 000 U/g uncoated xylanase can significantly reduce the ratio of feed to gain of broilers aged 22 to 42 days (P<0.05), and the supplementation of 30 000 U/g uncoated xylanase can increase average daily gain and decrease the ratio of feed to gain of broliers aged 15 to 42 days (P<0.05). 2) The supplementation of 20 000 and 30 000 U/g uncoated xylanase can significantly improve the apparent metabolic rate of crude protein (P<0.05); the supplementation of 20 000 U/g uncoated xylanase can significantly increase the apparent metabolizable energy (P<0.05); and the supplementation of 10 000 U/g coated xylanase can significantly increase the apparent metabolic rate of crude fat (P<0.05). 3) The supplementation of 10 000 U/g coated and 30 000 U/g uncoated xylanase can significantly improve the spleen index of broilers (P<0.05), and the supplementation of 30 000 U/g of uncoated xylanase can significantly increase the content of immunoglobulin G in serum of broilers (P<0.05). 4) The supplementation of 10 000 U/g coated, 20 000 U/g and 30 000 U/g uncoated xylanase can significantly reduce the relative weight of glandular stomach (P<0.05); the supplementation of 20 000 U/g uncoated xylanase can significantly reduce the relative weight of pancreas (P<0.05); and the supplementation of 30 000 U/g uncoated xylanase can significantly increase the duodenal villus height of broilers (P<0.05). In conclusion, xylanase supplementation can improve growth performance and nutrient metabolic rates of broilers, alleviate digestive burden, and promote the development of immune organs, and the supplemental effects of 30 000 U/g xylanase are the best. At the same level of xylanase, the effects of coated xylanase are better than those of uncoated xylanase.
LÜ Qiufeng
,
WEN Zongxue
,
WANG Cong
,
ZHANG Min
,
ZHANG Hengjie
,
LIU Guohua
. Coated and Different Levels of Xylanase: Effects on Growth Performance, Immune and Digestive Organ Development of Broilers[J]. Chinese Journal of Animal Nutrition, 2013
, 25(11)
: 2649
-2659
.
DOI: 10.3969/j.issn.1006-267x.2013.11.018
[1] 洪平,邬本成,刘春雪,等.小麦与玉米的营养价值差异及小麦替代玉米的可行性[J].今日畜牧兽医,2010(8):15-16.
[2] 罗定媛,杨凤霞,张利敏,等.小麦型日粮添加木聚糖酶对肉鸡生产性能和血液生化指标的影响[J].西北农林科技大学学报:自然科学版,2009,37(5):53-58.
[3] 孙永刚,亢娟娟,杜思刚,等.不同营养水平小麦日粮添加木聚糖酶对肉鸡生长性能及血液生化指标的影响[J].黑龙江畜牧兽医,2010(2):78-79.
[4] 王海英,呙于明,袁建敏.小麦日粮中添加木聚糖酶对肉仔鸡生产性能的影响[J].饲料研究,2003(12):1-5.
[5] CHOCT M,ANNISON G.The anti-nutritive activity of wheat pentosans in broiler diets[J].British Poultry Science,1992,31:811-821.
[6] 杨小军,杨凤霞,罗定媛,等.木聚糖酶对肉仔鸡养分利用和消化器官发育的影响[J].动物营养学报,2010,22(1):157-162.
[7] 郭志强,宋代军,顾维智.低代谢能小麦型饲粮添加木聚糖酶对肉鸡生产性能和养分代谢率的影响[J].黑龙江畜牧兽医,2009(11):51-52.
[8] SIMON O,HÜBENER K,HIRSCH K,et al.Effect of xylanases on the intestinal flora[J].Lohmann Information,2002,27:1-5.
[9] RIVAS A,FABRICANT T.Indication of immune-depression in chicken infected various strain of Marek's disease virus[J].Avian Diseases,1985,32:1-8.
[10] KATANBAF M N,DUNNINGTON E A,SIEGEL P B.Restricted feeding in early and late-feathering chickens.1.Growth and physiological responses[J].Poultry Science,1989,68:344-351.
[11] 张变英,王芳,张红岗,等.小麦替代玉米对肉仔鸡生产性能、免疫器官、血液指标、全肠食糜黏度的影响[J].中国畜牧兽医,2011(3):28-34.
[12] 丁雪梅,张克英.小麦-豆粕型日粮添加木聚糖酶对艾维茵肉鸡免疫指标、肠道形态和微生物菌群的影响[J].动物营养学报,2009,21(6):931-937.
[13] 高峰,江芸,周光宏,韩正康.非淀粉多糖酶制剂对雏鸡生长、免疫功能和肠道微生物区系的影响[J].中国兽医学报,2004,24(5):501-503.
[14] 王金全,蔡辉益,陈宝江,等.小麦日粮中添加木聚糖酶对肉仔鸡生产性能、免疫消化器官发育和血液代谢激素水平的影响[J].河北农业大学学报,2005,28(1):73-76.
[15] 吕秋凤,宁至利,王振勇.不同来源木聚糖酶及其组合对肉仔鸡血液指标的影响[J].沈阳农业大学学报,2010,41(4):473-476.
[16] KELLEY KW.Cross-talk between the immune and endocrine systems[J].Journal of Animal Science,1988,66(8):2095-2108.
[17] ANNISON G.Relatinship between the levels of soluble nnstarch polysaccharides and the apparent metabolizable energy of wheats assayed in broiler chickens[J].Journal of Agriculture and Food Chemistry,1991,39:252-256.
[18] 艾晓杰,韩正康,陈杰.禽胰液分泌的调节[J].国外畜牧科技,2000,27(5):37-40.
[19] 沈霞芬.家畜组织学与胚胎学[M].北京:中国农业出版社,2001:151-158.
[20] IJI P A.The impact of cereal non-starch polysaccharides on intestinal development and function in broiler chickens[J].World's Poultry Science Jounal,1999,18:129-133.
[21] 蒋桂韬,胡艳,王向荣,等.不同来源木聚糖酶对黄羽肉鸡小肠绒毛形态结构和黏膜生长抑素mRNA表达的影响[J].动物营养学报,2011,23(2):266-273.
