CAJ | 학술논문

[目的]研究固原地区秦川牛的生长发育规律。[方法]本实验采用随机抽样法测定了309头固原地区秦川牛利杂群体不同生长阶段的体尺和体重指标,利用Logistic、Brody、Gompertz、Bertallanffy四种生长曲线模型拟合其生长曲线,分别估算出四种曲线方程中的相关参数值。[结果]陕西秦川牛和固原本地秦川牛利杂群体母牛的Brody生长曲线模型的体重指标：成熟体重是428kg/286kg,尺度常数是0.9650/0.8999,成熟指数是0.0553/0.1372。Logistic模型拐点在极限体重的1/2处,拐点体重为0.5K,Gompertz模型拐点在极限体重的1/e处,拐点体重为0.368K。[结论]本地利杂牛群体成熟体重小,生长速度缓慢,生长强度低,较早熟。初步评价了导入利木赞血统杂交后的杂交优势,为本地区肉牛杂交改良提供了基础数据。
[목적]연구고원지구진천우적생장발육규률。[방법]본실험채용수궤추양법측정료309두고원지구진천우리잡군체불동생장계단적체척화체중지표,이용Logistic、Brody、Gompertz、Bertallanffy사충생장곡선모형의합기생장곡선,분별고산출사충곡선방정중적상관삼수치。[결과]협서진천우화고원본지진천우리잡군체모우적Brody생장곡선모형적체중지표：성숙체중시428kg/286kg,척도상수시0.9650/0.8999,성숙지수시0.0553/0.1372。Logistic모형괴점재겁한체중적1/2처,괴점체중위0.5K,Gompertz모형괴점재겁한체중적1/e처,괴점체중위0.368K。[결론]본지리잡우군체성숙체중소,생장속도완만,생장강도저,교조숙。초보평개료도입리목찬혈통잡교후적잡교우세,위본지구육우잡교개량제공료기출수거。
【Objective】The purpose was to study the growth and development regularity of Qinchuan cattle in Guyuan region.【Method】Body sizes and body weights of 309 Limousin×Qinchuan cattle were determined by Random Sampling.With Logistic,Brody,Gompertz and Bertallanffy Growth Curve Models,the growth curve equations of cattle were decided.And the parameters in the equations were estimated.【Result】The indices of Brody model of Shaanxi Qinchuan cattle and Guyuan local Qinchuan cattle were as following：Maturation Body Weight was 428 kg/286 kg,R2 value was 0.9650/0.8999,Maturation Index was 0.0553/0.1372.Deflection Point of Logistic Curve locates on 1/2 of Maximum Body Weight,equal to 0.5 K,And Gompertz Curve 1/e,0.386K.【Conclusion】Local Limousin×Qinchuan cattle were featured by smaller Maximum Body Weight,slower growth speed,lower growth intensity and earlier maturation age.Heterosis was estimated after introducing Limousin Cattle,which would provide basic data for the following hybridization work in this region.