猪胴体瘦肉率活体估测的研究

利用超声活体测膘仪了８１头同胞测定猪和杂交组合猪胴体瘦肉率的活体估测。结果表明，瘦肉率活体估测较实际剥离低７．７４３２％，。均值差异极显，但变异系数和标准误二十分接近；腰部、胸部边膘及胸部眼肌厚与瘦肉率活体估测的相关系数分别为－０．９０１４、－０．９１２８、０．５２１７，与实际剥离的相关系数分别为－０．６０４５、＝０．７６３１、０．５２０９，瘦肉率活体估测与实际剥离的相关系数为０．７７４９，均

STUDY ON LEAN PERCENTAGE OF ESTIMATION IN LIVE PIGS

Study on lean percentage of estimation of 81 crossbred pigs by ultrasonic device (Piglog105) was carried out. The results showed that means of lean percentage between the estimation and dissection had very significant difference. Lean percentage of estimation was lower than that of dissection (7.7432%), but CV and std. dev. of the both was very closed. The correlation coefficients between the fat?1, fat?2, live weight and muscle with lean percentage of estimation was -0.9014, -0.9128, 0.5217 respedively, and with the lean percentage of dissection was -0.6045, -0.7631, 0.5209 correspondingly. Correlation coefficient between estimation and dissection was 0.7749 . All correlation coefficients came up to very significant level. The regression equation of estimation lean percentage in live and on carcass was set up by using variable:fat 1, fat 2, live weight and muscle (on longissimus muscle). The R 2 and RSD of regression equation of estimation in live and carcass was 1.0000,0.0284 and 0.9999, 0.0573 respectively. Therefore, in practice, the lean percentage of estimation in vivo added up 7.743% to the actual lean percentage on carcass in our country.;