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Fitting the Weight Growth Curve of Xinjiang Brown Cattle

Zainaguli·Junjulieke1,2, TAN Rui3, HUANG Xi-xia1, WANG Ya-chun4, Rexiti·Abudoureyimu1,Nuerbiye·Wubuli1, CHENG Li-ming3, FU Xue-feng5, JIA Xu-sheng3, ZENG Li3   

  1.  (1.College of Animal Science,Xinjiang Agricultural University, Urumqi 830052,China;2.Xinjiang Key Laboratory of Herbivore Nutrition for Meat & Milk Production,Urumqi 830052,China;3.Animal Husbandry Service of Xinjiang Uygur Autonomous Region, Urumqi 830009,China;4.College of Animal Science & Technology, China Agricultural University,Beijing 100193,China;5.Xinjiang Academy of Animal Science,Urumqi 830000,China)
  • Received:2013-12-09 Online:2014-04-20 Published:2014-05-27

Abstract: The aim of this study was to explore the principles for growth and development of Xinjiang Brown cattle, using this four common growth curve model named Logistic, Gompertz, Brody and Bertallanffy in the SAS 8.1 software to fitting the weight growth curve for 344 heads Xinjiang Brown cattles. The results showed that four kinds of model all could fit the weight growth of Xinjiang Brown cattle very well, the degree of fitting R2 was 0.9217, 0.9263, 0.9176 and 0.9261. The Gompertz model was the best to fitting the weight growth of Xinjiang Brown cattle. The inflection point of the growth curve of in model Logistic, Gompertz and Bertallanffy were (0.4937 year,502.10 kg),(1.3168 year,379.54 kg)and(1.0477 year,3115.25 kg),respectively. This study had the certain reference value to the actual production.

Key words: Xinjiang Brown cattle; growth curve; Logistic model; Gompertz model; Brody model; Bertallanffy model