猪的平均日增瘦肉量活体测定方法研究

Study on the Method on the Measurement of Average Daily Lean Tissue Gain in Live Pigs

本文根据杜洛克和杜长大两个瘦肉型猪群的性能测定资料，对猪平均日增瘦肉量（简称日瘦肉量）的活体测定方法进行了研究。性能测定结果表明：全期日瘦肉量为杜洛克２１５．８１±１５．４８ｇ／天，杜长大２２５．００±２０．７７ｇ／天，测定期日瘦肉量为杜洛克２９２．４７±２５．５５ｇ／天。用超声活体测膘和逐步回归分析法筛选出可用于日瘦肉量活体测定的７个最优回归方程。

The measurement method of average daily lean tissue gain(ALTG) in live pigs has been studied by using the data of performence test of Duroc and Duroc (D) ×(Landrace(L)× Large White(W)).Seven optimal regression equations for predicting ALTG have been established by measuring backfat with ultrsonic and stepwise regression analysis.