不同品种小麦生长猪消化能与代谢能预测模型的建立

Modeling of DE and ME of Different Cultivars of Wheat in Growing Pigs

本试验旨在研究不同品种小麦的理化特性及对生长猪的消化能和代谢能值,并探讨通过理化特性建立消化能与代谢能预测模型的可行性。试验选取12头初始体重相近(50.1±2.8)kg的杜×长×大三元杂交去势公猪,随机分成2组,每组6头猪,采用2个6×6拉丁方设计,试验共6期。采用直接法评定12个小麦样品的能量价值,每个小麦样品配制1种日粮,共12种日粮,小麦在日粮中所占比例为97.0%。结果表明:12个不同品种小麦的能值差异极显著(P<0.05),其中北麦4的消化能含量最低(16.40 MJ/kg DM),而龙麦30的消化能含量最高(17.01 MJ/kg DM)。北麦4的代谢能含量亦最低(15.72 MJ/kg DM),辽春10最高(16.48 MJ/kg DM)。通过回归分析,建立了以总能和理化特性为基础的小麦消化能和代谢能预测模型,推荐预测模型:DE=-829-58.4×ADF+1.1×GE(R2=0.79,RSD=24.5),DE=-1384+1.1×GE+0.65×BW(R2=0.79,RSD=24.8),ME=-2990+1.7×GE-50.2×Xylans-87.6×Ash(R2=0.88,RSD=21.1)。

The experiment was conducted to measure the physical and chemical characteristics and the DE and ME content of wheat samples for growing pigs, and to develop prediction equations. Twelve growing barrows （50.1±2.8 kg） were used to determine the digestible energy （DE） and metabolizable energy （ME） content of 12 wheat cultivars, and the pigs were allotted to two 6×6 Latin square designs. Twelve diets were prepared, and the diet included 97.0% of wheat. The DE of wheat cuhivars ranged from 16.40 to 17.01 MJ/kg DM for Beimai4 and Longmai30, respectively, and the ME content ranged from 15.72 to 16.48 MJ/kg DM for Beimai4 and Liaochunl0, respectively. DE and ME content can be accurately predicted from GE, physical and chemical characteristics of wheat, and the recommend prediction equations are DE=-829-58.4×ADF＋ 1.1 ×GE（R^2=0.79, RSD=24.5）, DE=- 1384＋ 1.1 ×GE＋0.65×BW（R^2=0. 79, RSD=24.8）, ME=-2990＋1.7×GE-50.2×Xylans-87.6×Ash（R^2=0.88, RSD=21.1）.