›› 2009, Vol. 36 ›› Issue (10): 122-125.

• 奶业专栏 • Previous Articles     Next Articles

Study on Milk Performance of Xinjiang Brown Cattle

CHENG Li-ming1,3,FU Xue-feng1,Malati·hashan2,LI Wei-yong2, 
MA Xiao-yan1,ZHOU Guang-rui3,GUO Zhi-qin4,HUANG Xi-xia1
  

  1. (1.College of Animal Science, Xinjiang Agricultural University,Urumqi 830052,China; 2.Urumqi Conservation Farm, Urumqi 830002, China; 3.Improving Chief Administration of Livestock and Poultry Breeding, Xinjiang Uygur Autonomous Region, Urumqi 830009, China; 4.Animal Science Academy of Xinjiang Uygur Autonomous Region, Urumqi 830000, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2009-10-20 Published:2009-10-20
  • Contact: HUANG Xi-xia

Abstract: This experiment was conducted to study the variance of milk composition between grazing and barm feeding Xinjiang brown cattle,analyzed the change trend of milk composition and the correlation of milk production,fat percentage and protein percentage.Fifty-two Xinjiang brown cattles from Zhaosu grassland and one hundred fifty-four lactating cows from Urumqi cattle breeding farm,were randomly selected to monitor milk yield and milk composition.The results showed that the index of milk composition in grazing Xinjiang brown cattle is obviously higher than barn feeding Xinjiang brown cattle. There was highly significant (P<0.01). The relationship between milk production and fat percentage,protein percentage is negative correlation,and the correlation coefficient is -0.174(P<0.01),-0.245(P<0.01),respectively. The relationship between milk fat percentage and protein percentage was positive correlation,and the correlation coefficient is 0.411(P<0.01).These results indicated that milk production of barn feeding Xinjiang brown cattle is obviously higher than grazing,milk composition of grazing Xinjiang brown cattle is higher than barn feeding except for electrical conductivity and somatic cell count.

Key words: Xinjiang brown cattle; milk production; milk composition; change trend; correlation

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