China Animal Husbandry & Veterinary Medicine ›› 2010, Vol. 37 ›› Issue (6): 99-102.

• 遗传繁育 • Previous Articles     Next Articles

Study of Non-genetic Factors Affecting on Lactation Curve Traits of Inner Mongolia Sanhe Cattle

WANG Rui-jun1， ZHANG Zhi-gang3， WU Hong-jun4， WANG Dong-sheng4， WU En-qi4，SU Rui1， ZHANG Yan-jun1， WANG Ya-chun2， LI Jin-quan1   

  1. （1.Inner Mongolia Agricultural University,Hohhot 010018,China; 2.China Agricultural University,Beijing 100193,China; 3.Inner Mongolia Farm Science and Technology Popularization Station, Hohhot 010010，China;4.Agriculture and Animal Husbandry Aadministration Bureau of Hailaer in Inner Mongolia Autonomous Region，Hailaer 021012,China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-06-20 Published:2010-06-20
  • Contact: LI Jin-quan

Abstract: In order to understand shape of lactation curve and factors which affect on the lactation curve traits of Sanhe cattle.The Wood model was used for fitting the latation curve of 486 lactation records of Sanhe cattle.The results showed that the lactation curve was well fitted by the Wood model, and the R2 was 0.93±0.004.ANOVA method was used for analysing the effection on lactation curve traits by non-genetic fectors such as farm operation, calving year, calving season and parity.The results indicated that the effects of farm operation was highly significant for c, tmax, per and Y305; calving year was significant for b and highly significant for c,ymax,Y305; calving season was significant for per and highly significant for a,b,c,Y305; parity was highly significant for a,ymax,Y305;other factors had no significant for remain lactation curve traits.

Key words: Inner Mongolia Sanhe cattle; lactation curve; Wood model; fitting degree

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