日粮单宁水平对育成期雄性梅花鹿生长发育、角基萌发和初角茸生长的影响

本试验旨在研究日粮单宁水平对育成期雄性梅花鹿生长发育、角基萌发和初角茸生长的影响。选用24头体况相近的育成期雄性梅花鹿,采用单因素随机分组设计,分为4组,每组6头。对照组饲喂不添加单宁的基础日粮,Ⅰ、Ⅱ、Ⅲ组在基础日粮中分别添加1%、2%、4%单宁。预试期4d,正试期140d。结果表明,Ⅱ组梅花鹿体重、体高的平均日增长显著高于对照组(P0.05),各组间体长、管围的平均日增长差异均不显著(P0.05);与对照组相比,Ⅰ、Ⅱ、Ⅲ组梅花鹿角基萌发时间早;Ⅰ组梅花鹿初角茸左、右支茸长均高于对照组和Ⅱ、Ⅲ组,其中Ⅰ组梅花鹿初角茸右支茸长显著高于Ⅲ组(P0.05),Ⅰ、Ⅱ、Ⅲ组梅花鹿初角茸左、右支茸重均显著高于对照组(P0.05)。综上所述,日粮中添加单宁能促进梅花鹿的生长发育,提前角基萌发时间,同时提高初角茸的产量;育成期雄性梅花鹿日粮中单宁的适宜添加量为2%。

Effects of Dietary Tannins Levels on Growth Development,Pedicle Initiation and Primary Velvet Antler Growth of Sika Deer (Cervus nippon)

This experiment was conducted to study the effects of dietary tannins levels on growth development,pedicle initiation and primary velvet antler growth of young male sika deer (Cervus nippon).Twenty four 7-month-old male sika deer with similar body condition were randomly separated into four groups (6/group).The control group was fed with basal diets without tannins,groups Ⅰ,Ⅱ and Ⅲ were fed with basal diets complementary with 1%,2% and 4% tannins,respectively.The trial lasted for 4 days,and 140 days for experiment.The results showed that the daily growth of body weight and height in group Ⅱ were significantly higher than that in control group (P<0.05). There were no significant differences in the daily growth of body length and circumference of canon among all groups (P>0.05).The pedicle initiation time of sika deer from the tannins-treated groups was earlier than that of control group.The length of both branch from groupⅠwas longer than the other groups,and the right branch of groupⅠwas significantly longer than that of group Ⅲ (P<0.05).The production of primary velvet antler in groups Ⅰ,Ⅱ and Ⅲ was significantly higher than that in control group (P<0.05).In conclusion,supplementation of tannins promotes time of pedicle initiation,production of primary velvet antler and growth development of young sika deer.The optimum supplemental level of tannins in the diet of young sika deer was 2%.