三个不同品系不同性别高邮鸭生长曲线的拟合和分析

为研究三个不同群体(闭锁群、新组建群和保护区群)不同性别高邮鸭的生长发育规律,试验采用Gompertz、Logistic和Von Bertalanffy三种生长曲线模型拟合分析方法,测定了高邮鸭从出生到10周龄体重并进行了相应周龄体重拟合。结果表明:三个不同群体高邮鸭6周龄前生长速度较快,公、母鸭的体重值基本一致,6周龄后公鸭生长速度明显快于母鸭;Gompertz模型拟合结果更加接近于实际值;公、母鸭的生长拐点分别在5.0,4.5周龄,新选育的高邮鸭新品系拐点周龄稍早于闭锁群。     

樱桃谷鸭生长曲线拟合与比较分析

用Logistic,Gompertz和Bertalanffy 3种非线性生长模型对不同性别樱桃谷鸭的生长发育进行拟合。研究结果表明,樱桃谷公、母鸭在7周龄前生长曲线基本一致,而7周龄后公鸭明显快于母鸭;3种模型的拟合效果均很好,尤以Logistic,Gompertz模型最佳;Gompertz模型对鸭初生重的拟合结果更加接近于实际测量值。公鸭的成年体重显著高于母鸭,但达到拐点的周龄较母鸭迟,公、母鸭的生长拐点分别为4.78周和4.25周。     

西藏藏鸡生长曲线拟合及分析

为探究西藏藏鸡早期的生长发育规律,本研究采用Logistic、Bertalanffy和Gompertz非线性模型对公、母鸡从出生到24周龄的体重进行拟合分析。结果显示:3种生长曲线模型的拟合度均能达到0.99以上;进一步从统计和生物学意义角度评价3种模型发现,Gompertz模型拟合效果最好;Gompertz方程拟合公鸡和母鸡的生长拐点周龄分别为10.28周和10.65周;公鸡的拐点体重、最大周增重和最大体重分别为577.20、80.81、1569 g,母鸡分别为465.80、55.90、1266.18 g。研究表明3种模型对西藏藏鸡生长曲线的拟合和分析是可行的,可为管理藏鸡生长发育关键点提供参考。     

正常型隐性白羽鸡早期生长发育规律研究

为了解正常型隐性白羽鸡早期生长发育规律,试验选取刚出生的正常型隐性白羽鸡进行饲养,测定0～7周龄的体重、体尺和组织学特性,并采用Logistic、Gompertz和Von Bertallanffy三种数学模型对正常型隐性白羽鸡的早期生长发育情况进行曲线拟合及分析。结果表明:正常型隐性白羽鸡的早期生长速度快,各周增重逐渐加快,7周龄体重可达1 104.7 g;三种生长曲线拟合模型均有很好的拟合效果,其中Logistic模型拟合度为0.994,Gompertz模型和Von Bertallanffy模型的拟合度均高达0.997;Gompertz模型拟合的拐点周龄(7.09周)、拐点体重(1 120.65 g)、极限体重(3 046.24 g)等指标与实测值符合。说明Gompertz模型的拟合效果最好,可用于对正常型隐性白羽鸡早期生长发育情况的预测和饲养效果评估。     

嘉积鸭生长曲线拟合研究

为了解嘉积鸭的生长发育规律,采用Logistic、Gompertz和Bertalanffy三种非线性生长模型进行拟合。结果表明:三种模型均能较好地拟合嘉积鸭生长曲线,Gompertz模型拟合效果最佳。     

太湖鸡生长发育与曲线拟合情况分析

运用Logistic、Gompertz和Bertallanffy3种曲线模型对太湖鸡母鸡0~12周龄生长情况进行了分析和非线性拟合研究。结果表明:3种曲线模型均能较好地拟合太湖鸡的早期生长曲线(R2均为0.999)。分析发现:Logistic生长曲线对禽类早期生长的拟合效果较佳,而对早期生长发育较慢的地方禽种的生长后期拟合效果较差。经比较,3种生长曲线中以Gompertz曲线模型对太湖鸡母鸡的生长拟合效果最佳。通过生长曲线的拟合还能发现饲养管理中存在的问题。     

麒麟母鸡生长模型拟合与分析

为了解麒麟母鸡的生长发育规律,运用Logistic、Gompertz和Bertallanfy 3种非线性模型分别对1～16周龄麒麟母鸡的体质量进行生长曲线拟合与分析.结果表明,3种模型均能较好地拟合麒麟母鸡生长曲线,拟合度均达到0.99以上,其中Gompertz拟合效果最好.Gompertz模型中,麒麟母鸡的拐点体重是667.84g,拐点周龄是7.16周龄,通过适宜生长曲线的分析与拟合能够较好地判断掌握麒麟母鸡群的生长发育特性,为制定科学的饲养管理方案提供依据.     

不同性别蒙山草鸡生长模型拟合的研究

为了检验不同模型对蒙山草鸡生长发育的拟合效果,试验分别采用Logistic、Gompertz和VonBertalanffy3种非线性生长模型对不同性别蒙山草鸡的生长发育进行拟合。结果表明:公、母蒙山草鸡在2周龄前生长曲线基本一致,而2周龄后公鸡明显快于母鸡,3种模型的拟合效果均很好,以Gompertz模型最佳。公、母鸡的生长拐点分别为8.24周和7.46周,公鸡的成年体重显著高于母鸡,但达到拐点的周龄较母鸡迟。     

不同性别蒙山草鸡生长模型拟合的研究

为了检验不同模型对蒙山草鸡生长发育的拟合效果,试验分别采用Logistic、Gompertz和VonBertalanffy3种非线性生长模型对不同性别蒙山草鸡的生长发育进行拟合.结果表明:公、母蒙山草鸡在2周龄前生长曲线基本一致,而2周龄后公鸡明显快于母鸡,3种模型的拟合效果均很好,以Gompertz模型最佳.公、母鸡的生长拐点分别为8.24周和7.46周,公鸡的成年体重显著高于母鸡,但达到拐点的周龄较母鸡迟.     

白羽番鸭生长曲线拟合比较分析

试验测定不同性别法国白羽番鸭早期体重,用Logistic、Von Bertalanffy和Gompertz 3种非线性生长模型拟合其生长曲线。研究结果表明,白羽番鸭公鸭、母鸭4周龄前生长缓慢,后期公鸭生长快于母鸭;通过比较拟合优度（R2）、残差平方和（E）和进行适合性χ2检验结果发现,Gompertz模型拟合效果最佳。进一步比较不同性别Gompertz模型拟合参数,结果发现公鸭与母鸭相比,有较高的初始体重、极限体重、最大周增重和拐点体重,较低的初始生长速度。公鸭拐点周龄为7.03周,较母鸭的5.37周龄晚;公鸭4周龄前相对生长率小于母鸭,4周龄后则超过母鸭,绝对生长率差异较大。     

半番鸭及其亲本生长曲线拟合与杂种优势分析

实验测定了樱桃谷鸭、白羽番鸭、苏牧麻鸭、白羽番鸭♂×樱桃谷鸭♀(樱番鸭)、白羽番鸭♂×苏牧麻鸭♀(苏番鸭)早期体重数据,发现樱番鸭杂种优势率为12.8%,苏番鸭为22.04%。用Logistic、Von Bertalanffy和Gompertz3种非线性生长模型拟合其生长曲线,通过比较拟合优度、复相关指数和进行适合性χ2检验,发现Gompertz模型拟合效果最好。比较5组鸭Gompertz模型拟合参数,结果表明:在亲本鸭组中白羽番鸭初始重较樱桃谷鸭和苏牧麻鸭高,初始生长速度、最大周增重较这2个亲本组低,拐点时间也比其晚。2个杂交组最大周增重、成熟速度、极限体重、拐点体重、初始重和拐点时间都有很大提高,存在明显的杂种优势。     

麻旺鸭生长曲线拟合分析

本文对麻旺公母鸭体重随日龄增长应用Logistic和Gompertz模型进行生长曲线拟合分析,建立麻旺鸭公、母鸭的拟合曲线方程及求出拐点体重、拐点日龄。结果表明:两种模型均能很好地拟合公、母鸭生长规律,Logistic和Gompertz模型拟合公鸭的拟合度分别为R2=0.983,R2=0.986,母鸭R2=0.989,R2=0.990,两种模型相比,Gompertz拟合效果更好。     

文昌鸡生长模型拟合的研究

试验旨在通过生长曲线的拟合来了解文昌鸡生长发育的规律。用Logistic、Gompertz和Bertallanffy 3种非线性生长模型对公母文昌鸡的生长发育进行拟合。3种模型均能较好地拟合文昌鸡生长曲线,但是Gompertz模型在公母鸡上拟合效果均最佳。公母鸡在4周前生长较一致,4周后,公鸡生长速度明显快于母鸡。运用3种模型对文昌鸡进行生长曲线的拟合和分析是可行的,对及时了解文昌鸡的生长发育规律提供了参考。     

A Growth Performance and Nonlinear Growth Curve Functions of Large- and Normal-Sized Japanese Quail (Coturnix japonica)

This study aimed to evaluate the differences between the growth patterns of large- and normal-sized Japanese quail strains and their F₁ progeny, by fitting their growth parameter values to five nonlinear regression growth models (Weibull, Logistic, Gompertz, Richards, and Brody). The Richards model presented the best fit for both sexes of the large-sized quail strain, whereas the Gompertz model presented the best fit for both sexes of the normal-sized quail strain, based on goodness-of-fit criteria (higher adjusted R² and lower Akaike and Bayesian information criteria). Both sexes of F₁ birds derived from the cross between normal-sized females and large-sized males were best fitted by the Richards model. In contrast, growth parameters of the F₁ birds derived from the cross between large-sized females and normal-sized males were best fitted to the Gompertz model. The data could be fitted nearly as well to the Weibull and Logistic models as to the Richards and Gompertz models. The Brody model presented the poorest fit for the growth parameter values. The results indicated that the Richards and Gompertz models could best describe the growth characteristics of both large- and normal-sized quails. Moreover, the observed growth pattern of the F₁ birds was likely inherited from the male parental strain. To the best of our knowledge, this is the first study comparing the growth curves of the reciprocal F₁ generations with their parental strains in quails.     

海兰褐蛋鸡早期生长模型的拟合与分析简

为了掌握海兰褐蛋鸡早期的生长发育规律,运用Gompertz、vonBertalanffy和Richards三种非线性模型对0～10周龄的海兰褐蛋鸡体重数据进行了拟合与分析。结果表明：三种模型均能很好地模拟海兰褐蛋鸡早期的生长过程,拟合度均在0．99以上,但vonBertalanffij模型拟合效果更好,此模型拟合的生长曲线拐点周龄为19．98周,拐点体重为2358．44g,最大周增重为159．94g／周。yonBertalanffy模型在模拟海兰褐蛋鸡早期生长状况方面为理想的数学模型,此研究结果可作为科学饲养该鸡种的重要参考。     

连城白鸭肉用新品系早期生长规律及生长曲线拟合的研究

对0～9周龄的连城白鸭肉用新品系早期生长发育情况进行了测定和分析,并运用Gompertz模型对其生长曲线进行拟合与分析。结果表明:Gompertz模型能很好地模拟连城白鸭肉用新品系生长曲线,拟合度(R2)高(公鸭:R2=0.9998,母鸭:R2=0.9997),进一步对拟合参数分析,发现连城白鸭肉用新品系公鸭极限体重为2423.6g,拐点体重为891.7g,拐点周龄为3.5周;母鸭极限体重为2099.2g,拐点体重为772.3g,拐点周龄为3.2周。     

Comparative Study on Analysis and Fitting of Pudong Chicken Growth Curve

The objective of this paper was to study the growth and development laws of Pudong chicken. The growth curve of Pudong chicken(cock and hen) from 0 to 20 weeks was analyzed and fitted with three models(Gompertz, Logistic and Bertalanffy). It was concluded that the growth curves were appropriately fitted with three models, and fitness degree(R2)in growth data of Pudong chicken were all above 0.992. The Bertalanffy model was the most effective with the highest R2 for cock(R2=0.995) and hen(R2=0.999), respectively. With further analysis of fitted parameters for Logistic model of cock, 0-3 weeks' fitted values were significantly greater than measured values and 4-8 weeks ' fitted values were lower than measured values. Compared with Logistic model, the values calculated by Gompertz model and Bertalanffy model were more coincident with the practical measuring values. For hens, 0-3 weeks ' fitted values of Logistic model were significantly greater than measured values and 0-2 weeks ' fitted values of Gompertz model were slightly greater than measured values, while the values calculated by Bertalanffy model best matched the observed val-ues from actual measure. The results showed that Bertalanffy model used to estimate the growth weight of Pudong chicken was the best while Logis-tic model was the worst. So the fitness and analysis of growth curves of Pudong chicken are valid, which may be adopted to predict growth and de-velopment laws of Pudong chicken and provide reliable data for precise feeding and breeding.     

不同性别龙胜凤鸡生长曲线的拟合与分析

为了解龙胜凤鸡的生长发育规律，本研究运用Logistic、Gompertz和Bertalanffy3种非线性模型分别对龙胜凤鸡的生长情况进行曲线拟合和分析。研究结果表明，3种模型均能较好的模拟龙胜凤鸡生长曲线，拟合度假。）均高于0．99，其中以Bertalanffy模型的拟合度最高（公、母鸡都为0．997）。因此，运用3种模型对龙胜凤鸡进行生长曲线的拟合和比较分析是可行的，本研究也为及时了解龙胜凤鸡的生长发育规律提供了参考。