优质三黄鸡粤黄882早期生长发育规律观测分析

发布时间：2019-04-26 21:21

【摘要】：【目的】观测分析优质三黄鸡粤黄882早期发育过程中体重与体尺的相关性,为后期动态研究三黄鸡的生长发育及制定生长计划提供科学依据。【方法】运用Logistic模型和Gompertz模型分别对0~9周龄三黄鸡粤黄882的体重进行生长曲线拟合,并以SPSS 10.0对其2、4、6和8周龄的体重与5个主要体尺指标(胫长、体斜长、胸骨长、胸深和胸宽)进行相关分析和体型指数计算。【结果】三黄鸡粤黄882的体重和体尺指标均随日龄的增长而逐渐增加,胫长、体斜长和胸骨长呈全期生长趋势,胸宽和胸深呈阶段性生长趋势,以4~6周龄的增长幅度较高;体重与5个主要体尺指标(胫长、体斜长、胸骨长、胸深和胸宽)间均呈极显著正相关(P0.01)。Logistic模型和Gompertz模型均可很好地拟合出三黄鸡粤黄882的生长曲线,拟合度(R2)在0.9980以上,综合极限体重、拐点周龄和体重等参数,发现Gompertz模型的拟合效果略优于Logistic模型。由Gompertz曲线方程拟合得出公鸡的生长曲线拐点为(8.15,1273.78),母鸡的生长曲线拐点为(4.08,419.25)。【结论】三黄鸡粤黄882的生长拐点为公鸡8.15周、母鸡4.08周,公鸡较母鸡发育迟缓。由于公鸡和母鸡的生长速度不一致,其早期生长发育所需营养量也不同,因此三黄鸡粤黄882宜在4周龄前分群饲养,有助于发挥母鸡高水平的产蛋性能。
[Abstract]:[objective] to observe and analyze the correlation between body weight and body size during early development of high quality Sanhuang chicken Yuehuang 882. [methods] Logistic model and Gompertz model were used to fit the growth curve of Yuehuang 882 at the age of 0 ~ 9 weeks, and SPSS 10.0were used to study the growth curve of Sanhuang chicken. At the age of 6 and 8 weeks, the body weight and 5 main body size indexes (shank length, oblique length, sternum length, etc.) [results] the body weight and body size index of Yuehuang 882 of Sanhuang chicken increased gradually with the increase of day age, and the shank length, body oblique length and sternum length showed the whole growth trend, and the body weight and body size index of Guangdong Yellow 882 increased gradually with the increase of day age, and the body length and sternal length of Sanhuang chicken showed a whole growth trend. The chest width and chest depth showed a phased growth trend, and the growth range of 4 ~ 6 weeks old was higher than that of 4 ~ 6 weeks old. There was a very significant positive correlation between body weight and five main body size indexes (tibia length, oblique length, sternum length, chest depth and chest width) (P0.01). Logistic model and Gompertz model could well fit the growth curve of Yuehuang 882 of Sanhuang chicken. The fitting effect of Gompertz model was slightly better than that of Logistic model when the fitting degree (R2) was more than 0.9980 and the parameters such as ultimate body weight inflection point cycle age and body weight were considered to be better than those of Logistic model. The inflection point of growth curve of rooster was (8.15, 1273.78) and the inflection point of growth curve of hen was (4.08419.25). [conclusion] the growth turning point of Sanhuang chicken Yue Huang 882 was 8.15 weeks and 4.08 weeks, respectively. Roosters are slower than hens. Because the growth rate of rooster and hen is different, and the nutrition quantity of their early growth and development is different, Yuehuang 882 of Sanhuang chicken should be raised separately before the age of 4 weeks, which is helpful to give full play to the high level of laying performance of hens.
【作者单位】：甘肃农业大学动物医学院;
【基金】：国家自然科学基金项目(31560686)
【分类号】：S831

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