This experiment was designed to evaluate the apparent digestible energy and nutrient apparent digestibility in rice straw and soybean straw of meat rabbits. Forty-two 85-day-old Yila meat rabbits with an average body weight of (2.26±0.29) kg were randomly allocated into 7 groups with 6 replicates per group. The experimental diets were formulated by substitution method and the substitution ratio of rice straw and soybean straw in basal diet were 20%, 15%, 10%, respectively. The digestion trial was using a total collection of excreta method. Both pre-trial and trial period lasted for 5 days. The results showed as follows: 1) gross energy (GE), apparent digestible energy (ADE) and apparent digestibility of energy in rice straw and soybean straw were 13.90 MJ/kg, 4.06 MJ/kg, 29.20% and 14.98 MJ/kg, 2.43 MJ/kg, 16.22%, respectively. 2)The average apparent digestibilities of dry matter (DM), crude protein (CP), crude fiber (CF), neutral detergent fiber (NDF), acid detergent fiber (ADF), crude ash (Ash), calcium (Ca) and phosphorus (P) in rice straw and soybean straw were 44.61%, 74.04%, 11.23%, 27.97%, 25.95%, 30.94%, 17.39%, 0.51%, and 36.66%,29.22%,4.54%,26.22%,15.05%,30.18%,32.23%,-68.15%, respectively. The apparent digestibilities of CP and P in rice straw were significantly higher than that in soybean straw (P<0.05). 3) The apparent digestibilities of ADE, CF, NDF, ADF in rice straw and DM, CF, Ca in soybean straw in different substitute percentages were significant difference (P<0.05). In conclusion, considering the indexes of chemical composition and nutrition digestibility, the nutrient value of rice straw is higher than that of soybean straw for meat rabbits, meanwhile the substitute ratio of feeds should be no less than 15%.
YANG Guiqin
,
GUO Dongxin
,
LI Chuang
,
SUN Liang
,
TIAN He
,
LI Jiantao
. Evaluation of Apparent Digestible Energy and Nutrient Apparent Digestibility in Rice Straw and Soybean Straw of Meat Rabbits[J]. Chinese Journal of Animal Nutrition, 2013
, 25(11)
: 2689
-2695
.
DOI: 10.3969/j.issn.1006-267x.2013.11.023
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