Analysis The Law Of Growth And Development To Xinjiang Brown Cattle

Xinjiang brown cattle is cultivated milk meat type breeds in China, it has high yield and good genes. At the same time,Xinjiang brown cattle can anti cold weather and adapt to the mountain grassland grazing and other advantages. In this paper, the analysis of body size and body weight of Xinjiang Urumqi cattle farm about Xinjiang brown cattle monthly data measured lasts five years; correlation of body measurement index(body height, body length, chest girth, cannon circumference) and producing performance; in the Urumqi cattle farm, Yili brown cattle farm,Tacheng cattle field the actual measurement of 386 brown cattle the bovine type linear evaluation to results of scientific analysis; on the basis of this research of Xinjiang brown cattle bull, cow growth rule and reveals the relationship between the characters, make the reasonable selection and mating scheme, strengthening feeding management, more evaluation of Xinjiang brown cattle economic value correctly, in order to make 9 points linear standard for Xinjiang brown cattle,genetic breeding and provides basic data reliable for cultivation development of bull.1. In Xinjiang Urumqi cattle farm, brown cattle breeding center 1-16 months to 2335 of Xinjiang brown cattle body size, body weight were measured data as basic material, explores the law of growth and development of bulls, cows, analyzing the correlation between index of body weight and body size(body height, body length, chest girth, cannon circumference). The results show that: with the increase of age, the body measurement traits have different degrees of increase, cow weight growth rate is greater than the bull; correlation coefficient maximum of chest girth and weight, correlation coefficient minimal of cannon circumference and weight.2. Urumqi cattle farm from 1998 to 2013 121 of Xinjiang brown cattle data was carried out the correlation between body size traits and different parity milk yield to primary,six month,twelve month and eighteen month old. The results show that: there is significant correlation between Xinjiang brown cattle body weight, body height and 305 d milk yield(P<0.01). In twelve month and eighteen month of age, body weight, body height and 305 d milk yield was significantly negatively correlation, body length, chest circumference and 305 d milk yield was not significantly correlated. The body weight, body height is an important parameter affecting milk production to Xinjiang brown cattle, keep the hanging body condition and weight has an important significance on milk yield.3. In the Urumqi cattle farm, Yili brown cattle farm,Tacheng cattle field, the 20 measured traits and 23 type linear appraisal actual measured of 386 brown cattle,the result using SPSS statistical software for analysis, a comprehensive reflection of its linear type traits of the advantages and disadvantages, provide data to make Xinjiang Brown cattle 9 point standard linear evaluation. The research results show that: the average body height, the average chest circumference and the circumference of abdomen in Urumqi cattle farm were significantly higher than Yili brown cattle farm and Tacheng cattle farm, milking system is better than the Yili brown cattle farm(Tacheng cattle farm milking system data is not complete, do not analyze).