雏鸽生长曲线的探讨

Studies on the Growth Curves of Pigeon′s Squab

本文对两组喂不同料的５１ 只雏鸽用Ｂｏｄｙ，Ｌｏｇｉｓｔｉｃ 和Ｇｏｍｐｅｒｔｚ 方程拟合雏鸽生长曲线，分别采用试位法（ＤＵＤ） 、高斯－ 牛顿法（ＧａｕｓｓＮｅｗｔｏｎ） 和麦夸特法（Ｍａｒｑｕａｒｄｔ） 对方程进行迭代求解各参数，结果表明，两组雏鸽的Ｌｏｇｉｓｔｉｃ 和Ｍａｒｑｕａｒｄｔ 方程能很好地拟合雏鸽生长曲线，拟合度Ｒ２ 均在０－９７ 以上，Ｂｏｄｙ 方程拟合较差，Ｇｏｍｐｅｒｔｚ 曲线拐点比Ｌｏｇｉｓｔｉｃ 曲线拐点要早，Ｇｏｍｐｅｒｔｚ 曲线极限体重参数Ａ 大于Ｌｏｇｉｓｔｉｃ 曲线，亲鸽饲喂全价颗粒料的雏鸽生长曲线拐点时间比亲鸽饲喂原粒料的雏鸽早１－２ ｄ ，前者生长速率比后者大，两者雏鸽极限体重分别为５９７－５ ｇ 和５３５－５ ｇ 。

The results showed that the equation of Logistic and Marquardt could fit the squab′s growth curves exactly,the goodness of fit was greater than 0.97.the equation of body could not fit the curves exactly.The time of the inflection point of squab growth curves whose parents fed complete all pelleted ration was 1.2 days earlier than squab whose parents fed native feed.The lowest growth rat(k) in former curves was greater than the latter.The highest asymptotic final weight(A) of two kinds of curves was 597.6 and 535.5 g, respectively.