【摘要】 选用15头胎次、预产期近似,品种一致的经产大白母猪,考察了一个哺乳期内母猪背膘厚度和采食量的变化。研究发现:采食量与背膘厚度在哺乳期内都呈二次曲线变化,即Y(采食量,kg)=-2.3056x2+24.239x-20.417与Y(背膘厚度,mm)=-0.0714x2-0.4x+19.107。哺乳期采食量与母猪哺乳期的失重存在显著负相关(P<0.05),哺乳期各阶段采食量与母猪背膘厚度呈明显的线性负相关(P<0.1),回归方程为Y(背膘厚度,mm)=19.876-0.085X。上述结果表明,以哺乳阶段为自变量建立回归方程预测采食量的准确性要优于背膘厚度,通过采食量预测背膘厚度也可取得较满意的结果。更多还原

【Abstract】 Fifteen Yorkshire lactating sows were used to investigate the change in feed intake and black fat thickness of lactating sows in a whole lactation period.The result showed that the feed intake and black fat thickness were increased quadratically with increased lactation phase.The feed intake of sows in lactation period was correlated negatively with its black fat thickness(P<0.05).From what discussed above,the result indicated that the accuracy would be better when the lactation phase was regarded as independent variable to build regression equation.The similar result was obtained by predicting feed intake of sows with the black fat thickness,too.更多还原