Content area
Full Text
Abstract This study was to investigate the effect of biological compound premix on the performance and milk quality in dairy' cows. Twenty Holstein cows, with the similar age, parity, lactating month, gestation period, milk quantity and body weight, were randomly divided into two groups. The cows in two groups were fed with either common compound premix as control or 5% biological compound premix as treatment group. Two treatments contained same basal diet but different compositions of premix. The feeding experiment lasting 74 days displayed that daily milk quantity in treatment group was significantly higher than control group( /' <0.05 ). The milk fat percentage was increased significantly in treatment group with the extended lactation time than control group (PcO. 05). The milk protein and solids percentage were raised, but no significant difference was found between the two treatments (P>0.05). The results indicated that 5% biological compound premix supplied in basal diet could facilitate to increase the milk performance and to ameliorate the milk quality of daily cows.
Key words Biological compound premix ; Daily cattle ; Performance ; Milk quality
In-depth recognition on food safety, the public has paid more and more concern on green and healthcare products. Long term use of large quantities of chemical additives and compounds, such as antibiotics, growth-promoting factors and preservatives, has been broadly applied in feeds and promoted I he development of husbandry industry. However, these chemicals, especially the overuse of antibiotics, have also brought obvious negative effects caused by drug resistance and pesticide residues, endangering the health of human being severely. Thus, seeking for safe, efficient and environment friendly substitutes for antibiotics would be the key to reduce the application amount of antibiotics and incidence of mastitis in dairy cattle, to enhance milk quantity and performance of dairy cattle.
Microecological preparation is a species of new feed additives developed in recent 20 years. It is endowed with dual effects of antibiotic and enzyme, which can effectively supplement the beneficial microorganisms in digestive tracts of animals, ameliorate the dynamic balance of microorganism population, rapidly enhance the abilities of disease resistance, metabolism and feed utilization rate, thus preventing some diseases in digestive tracts and promoting animal growth '1. With the rapid development of dairy milk and daily husbandry,...