摘要
本试验旨在研究饲粮中添加过瘤胃赖氨酸(RPLys)对福清山羊生长性能、养分表观消化率和氮代谢的影响。选择体况良好、体重[(12.06±1.65)kg]相近的4月龄福清山羊羯羊30只,采用单因素试验设计,随机分为5组,每组6只。对照组饲喂基础饲粮,试验Ⅰ、Ⅱ、Ⅲ和Ⅳ组在基础饲粮中每只羊添加2.5、5.0、7.5和10.0 g/d RPLys。预试期15 d,正试期60 d。结果表明:1)饲粮中添加RPLys对福清山羊干物质采食量(DMI)、总能采食量、初始体重、终末体重、总增重和平均日增重(ADG)均无显著影响(P>0.05),试验I组的DMI最高,试验Ⅱ组的总增重和ADG最高。2)饲粮中添加RPLys对福清山羊干物质、有机物、总能、中性洗涤纤维和酸性洗涤纤维的表观消化率均无显著影响(P>0.05)。3)对照组的进食氮显著低于各试验组(P<0.05),试验Ⅳ组的进食氮显著高于试验Ⅰ和Ⅱ组(P<0.05)。试验Ⅳ组的粪氮显著高于试验Ⅱ组(P<0.05)。试验Ⅰ、Ⅱ和Ⅲ组的沉积氮显著高于对照组(P<0.05)。各组之间的尿氮、排泄氮、氮沉积率和氮生物学价值无显著差异(P>0.05)。由此可见,在本试验条件下,饲粮中添加RPLys对福清山羊生长性能无显著影响,饲粮中添加2.5~7.5 g/d RPLys显著提高了福清山羊的沉积氮。
The purpose of this experiment was to study the effects of dietary rumen-protected lysine(PRLys)on growth performance,nutrient apparent digestibilities and nitrogen metabolism of Fuqing goats.Thirty Fuqing wether goats with good physical condition and similar body weight[(12.06±1.65)kg]were selected and divided into 5 groups with 6 goats according to a randomized block design.Goats in the control group were fed a basal diet,and the others in trial groupsⅠ,Ⅱ,ⅢandⅣwere fed basal diets supplemented 2.5,5.0,7.5 and 10.0 g/d PRLys per goat,respectively.The preparation period was 15 days,and the formal period was 60 days.The results showed as follows:1)dietary PRLys had no significant effects on dry matter intake(DMI),gross energy intake,initial body weight,final body weight,total weight gain and average daily gain(ADG)of Fuqing goats(P>0.05),the DMI of trial group I was the highest,and the total weight gain and ADG of trial groupⅡwere the highest.2)Dietary PRLys had no significant effects on nutrient apparent digestibilities of dry matter,organic matter,gross energy,neutral detergent fiber and acid detergent fiber of Fuqing goats(P>0.05).3)The nitrogen intake of the control group was significantly lower than that of other trial groups(P<0.05),and the nitrogen intake of trial groupⅣwas significantly higher than those of trial groupsⅠandⅡ(P<0.05).The fecal nitrogen of trial groupⅣwas significantly higher than that of trial groupⅡ(P<0.05).The nitrogen deposition of trial groupsⅠ,ⅡandⅢwas significantly higher than that of the control group(P<0.05).There were no significant differences in urine nitrogen,excreted nitrogen,nitrogen deposition rate and biological value of nitrogen among all groups(P>0.05).In conclusion,under the conditions of this experiment,dietary RPLys has no significant effect on the growth performance of Fuqing goats,and dietary 2.5 to 7.5 g/d RPLys significantly increase the deposition nitrogen of Fuqing goats.
作者
刘远
吴贤锋
占今舜
霍俊宏
黄勤楼
李文杨
LIU Yuan;WU Xianfeng;ZHAN Jinshun;HUO Junhong;HUANG Qinlou;LI Wenyang(Institute of Animal Husbandry and Veterinary,Fujian Academy of Agricultural Science,Fuzhou 350013,China;Institute of Animal Husbandry and Veterinary,Jiangxi Academy of Agricultural Science,Nanchang 330200,China)
出处
《动物营养学报》
CAS
CSCD
北大核心
2022年第1期432-441,共10页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
福建省省属公益类科研院所基本科研专项(2019R1026-10,2020R10260014)
江西现代农业科研协同创新专项(JXXTCX201702-04)。
