›› 2016, Vol. 43 ›› Issue (12): 3193-3199.doi: 10.16431/j.cnki.1671-7236.2016.12.016

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Effects of Different Proportions of Cassava Stem and Leaf in Diets on Growth Performance, Serum Biochemistry Index and Nutrient Apparent Digestibility of Hainan Black Goat

HU Lin1,2, WANG Ding-fa1, LI Wei1,2, ZHOU Lu-li1, LI Mao1, ZHOU Han-lin1   

  1. 1. Tropical Crops Genetic Resources Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737, China;
    2. College of Agriculture, Hainan University, Haikou 570100, China
  • Received:2016-05-05 Online:2016-12-20 Published:2016-12-22

Abstract:

The test was conducted to study the effect of different proportions of sun-dried cassava stem and leave in diet on growth performance,serum biochemical indexes and nutrient apparent digestibility of Hainan Black goat. 20 weanling Hainan Black goats with similar day old and body weight were selected and divided into four groups (groups Ⅰ,Ⅱ,Ⅲ,Ⅳ) which the concentrate to cassava stem and leaf ratio were 3:7,4:6,5:5 and 6:4,respectively. The test period was 60 d. The results showed that:The ADFI and ADG of group Ⅲ were higher than the other three groups. And the ADG of group Ⅲ was significantly higher than that of group Ⅰ (P<0.05);ALT of group Ⅰ was significantly higher than group Ⅳ (P<0.05),while there was no significant differences in the other indexes (TP,ALB,GLB,AST,BUN,TC,TG and GLU) between the experimental groups (P>0.05).The nutrient apparent digestibility in group Ⅲ were the highest,and all gradually increased from groups Ⅰ to Ⅲ, and then decreased in group Ⅳ. Therefore,in the actual production,the recommend ratio of concentrate to cassava stem and leaf was 5:5 when feed fattening Hainan Black goat. On this basis,it could also be appropriate to reduce concentrated content and increase cassava stem and leave content to reduce the feeding cost,but the proportion of cassava stem and leave should not be more than 60%.

Key words: cassava stem and leaf; concentrates to forage ratio; total mixed ration; growth performance; serum biochemistry index

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