Warnants Nathalie, Millet Sam, Van Oeckel Monique J, De Paepe Marc, De Brabander Daniël L
Institute for Agricultural and Fisheries Research, Animal Sciences, Flemish Government, Melle, Belgium.
Arch Anim Nutr. 2008 Apr;62(2):127-40. doi: 10.1080/17450390801912027.
In Belgium, crossing a hybrid dam with a Piétrain sire leads to a rather lean and meaty fattening pig type. A digestibility trial and a performance trial were carried out to determine protein needs of this pig type. Six experimental diets with increasing protein content were formulated with 0.65-1.25% apparent ileal digestible lysine. The feeds were formulated to the ideal protein composition, with lysine as the reference amino acid. Standardised and apparent digestible amino acid values of the extreme diets were measured in a digestibility trial with four gilts cannulated at the end of the ileum, with an average initial and final BW of 39.1 kg and 55.3 kg, respectively, using a protein-free feed to estimate the basal endogenous N-losses. A performance trial at 13-18 weeks of age (40-70 kg BW) was performed with barrows and gilts separately at six protein levels, balanced in lysine, threonine, methionine and tryptophan. The experiment consisted of 11 pens (of 5 animals) per treatment and per sex. Average daily gain (ADG) and feed conversion ratio (FCR) reached maximal performance within the experimental lysine range for both sexes. Based on the ADG-data for barrows and on the ADG- and FCR-data for gilts, a protein level for optimal performance corresponded with a standardised ileal digestible lysine concentration of 0.89% for barrows and of 1.07-1.09% for gilts.
在比利时，用皮特兰公猪与杂交母猪配种会培育出一种育肥猪，其瘦肉率较高且肉质较好。为确定这种猪的蛋白质需求，进行了一项消化率试验和一项性能试验。配制了六种蛋白质含量递增的试验日粮，其表观回肠可消化赖氨酸含量为0.65 - 1.25%。日粮按照理想蛋白质组成配制，以赖氨酸作为参考氨基酸。在一项消化率试验中，对四头回肠末端插管的后备母猪进行测定，得出了极端日粮的标准化和表观可消化氨基酸值，这些母猪的初始体重和终末体重平均分别为39.1千克和55.3千克，使用无蛋白饲料来估计基础内源氮损失。在13 - 18周龄（体重40 - 70千克）时，对阉公猪和后备母猪分别在六个蛋白质水平下进行了性能试验，这些水平在赖氨酸、苏氨酸、蛋氨酸和色氨酸方面保持平衡。试验包括每种处理和每种性别的11个猪栏（每个猪栏5头猪）。对于两种性别而言，平均日增重（ADG）和饲料转化率（FCR）在试验赖氨酸范围内均达到最佳性能。基于阉公猪的ADG数据以及后备母猪的ADG和FCR数据，最佳性能对应的蛋白质水平为：阉公猪的标准化回肠可消化赖氨酸浓度为0.89%，后备母猪为1.07 - 1.09%。
