RESEARCH PAPER

Effects of Composition of Compound Enzyme Preparation, Citric Acid and Potassium Diformate on Growth Performance, Nutrient Apparent Digestibility and Immunity Indexes of Meat Rabbits

  • LI Yanping ,
  • ZHAN Haijie ,
  • CAO Liang ,
  • DANG Wenqing ,
  • FAN Aifang ,
  • SHANGGUAN Mingjun ,
  • REN Keliang
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  • College of Animal Science, Shanxi Agricultural University, Taiyuan 030032, China

Received date: 2022-03-23

  Online published: 2022-10-17

Abstract

The purpose of this experiment was to investigate the effects of composition of compound enzymatic preparation, citric acid and potassium diformate on growth performance, slaughter performance, nutrient apparent digestibility and immune indexes of meat rabbits. A total of 240 Yila commercial meat rabbits (half male and half female) with body weight of (916.00±124.26) g at 35 days of age were randomly divided into 4 groups. Each group consisted of 60 replicates with 1 rabbit per replicate.While rabbits in control group were fed a basic diet, the ones in experimental groups were fed the basal diet containing 0.15% enzyme preparation and 0.70% citric acid+0.30% potassium diformate (group Ⅰ), 0.50% citric acid+0.50% potassium diformate (group Ⅱ), 0.30% citric acid+0.70% potassium diformate (group Ⅲ), respectively. The pretrial period was 5 days and the experiment period was 35 days. The results showed as follows:1) average daily gain in groupⅢ was significantly higher than that in control group (P<0.05), and feed/gain in group Ⅲ was significantly lower than that in control group (P<0.05), and the mortality rate was significantly lower than that in control group (P<0.05). There were no significant differences in final body weight, average daily feed intake and diarrhea rate among all groups (P>0.05). 2) Apparent digestibilities of ether extract, ash and acid detergent fiber in experimental groups were higher than those in control group, and apparent digestibility of ether extract in group Ⅱ was the highest, which was significantly different from that in control group (P<0.05). 3) Group Ⅲ had the highest sacculus rotundus index, which was significantly higher than that in control group (P<0.05). In group Ⅲ, serum immune globulin (Ig)A, IgM and interleukin-10 (IL-10) contents were extremely significantly higher than those in control group (P<0.01), while serum secretory immunoglobulin A (sIgA) content was significantly higher (P<0.05); serum IL-10 content in group Ⅱ was extremely significantly higher than that in control group (P<0.01), and serum IgA, sIgA and IgM contents were significantly higher (P<0.05); serum sIgA and IgM contents in group Ⅰ were significantly higher than those in control group (P<0.05). In conclusion, dietary compound enzyme preparation,citric acid and potassium dicarboxylate can improve immunity and growth performance, and reduce feed/gain and mortality rate of weaned meat rabbits. It is advisable to add 0.15% enzyme preparation, 0.30% citric acid and 0.7% potassium diformate in diets.

Cite this article

LI Yanping , ZHAN Haijie , CAO Liang , DANG Wenqing , FAN Aifang , SHANGGUAN Mingjun , REN Keliang . Effects of Composition of Compound Enzyme Preparation, Citric Acid and Potassium Diformate on Growth Performance, Nutrient Apparent Digestibility and Immunity Indexes of Meat Rabbits[J]. Chinese Journal of Animal Nutrition, 2022 , 34(9) : 6033 -6042 . DOI: 10.3969/j.issn.1006-267x.2022.09.056

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