This experiment was conducted to ascertain the deposition and requirements of amino acids in Guizhou Xiang pigs for the 7 to 25 kg growth period. Thirty-four pigs (male∶ female=1∶ 1) at 60 to 75 days of age fed diets of protein-free equalized digestible energy (DEpf) were selected to carry out comparative slaughter experiment. Results showed that the deposition of digested lysine (DLys), averagely 15.33 g/kg of fat-free gain, was basically no difference in both the 7 to 16 kg and 16 to 25 kg growth periods and among diets containing different gradients of protein and amino acids. The deposition of other amino acids kept stable proportional relationship with that of lysine. The surplus of intake DLys deducted the maintenance consumption of corresponding fat-free gain was almost entirely used for protein deposition. The deposition efficiency averaged 95.36%. The results indicate that lysine is the first limitation amino acid of Guizhou Xiang pigs. Requirement of DLys is (13.58-0.075 BW) g/kg of live body weight gain for growth. Taking DLys as 100, the digested amino acids pattern is: Lys 100, Thr 55, Val 104, Met 23, Ile 44, Leu 123, Phe 15, His 44, Arg 92 and Trp 17.
YANG Zhengde, LUO Guoxing, DAI Yi, LUO Aiping, WU Ping
. Deposition and Requirements of Amino Acids in Guizhou Xiang Pigs for the 7 to 25 kg Growth Period[J]. Chinese Journal of Animal Nutrition, 2011
, 23(11)
: 2009
-2015
.
DOI: 10.3969/j.issn.1006-267x.2011.11.023
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