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he experiment was to investigate the effect of feeding sheep with unbroken bee pollen on growth performance, immunity and economic benefits. Selected 30 Hu sheep ewes weighing (36.53 ± 3.81) kg and randomly divide into five groups, with three replicates in each group and two sheep in each replicate. The sheep in CK group were fed with a basic diet, the experimental groups were with fed a basic diet supplemented with 2 (group A), 5 (group B), 8 (group C) and 11 g/(piece·d) (group D) of unbroken bee pollen. The trial period was 40 d, with a pre trial period of 10 d and a formal trial period of 30 d. The results showed that compared with CK group, the average daily feed intake in group B was extremely reduced ( P<0.01). Compared with CK group, the serum IgA content in group A was significantly increased ( P<0.05), while the IgG content was extremely increased ( P<0.01), the IgG content in the serum of group B and group C significantly increased ( P<0.05). Compared with CK group, the total feed cost of group A, group B, group C and group D increased by -1.29%, 3.99%, 17.83% and 31.66% respectively, the gain on weight increased by 33.33%, 6.67%, -6.67% and -11.79% respectively, the economic benefits increased by 124.61%, 13.72%, -71.23% and -126.33%, respectively. The study indicates that feeding with unbroken bee pollen appropriately can reduce feed input, improve sheep growth performance, serum immunity function and economic benefits of sheep. It is suggested to add 2 g/(piece ·d) of unbroken bee pollen in Hu sheep production. [ABSTRACT FROM AUTHOR]

The experiment was to study the effect of calcium zinc mixture feed additives on production performance and milk quality of dairy cows. A total of 180 lactating period Holstein dairy cows with similar pens, parity and days of lactation were randomly divided into two groups, with 90 replicates in each group. The dairy cows in control group were fed with a full-mixed diet, and the dairy cows in test group were fed with a full-mixed diet + 500 mL/(head ·d) calcium and zinc mixture, for 3 d consecutive, then stopped for 4 d, lasted for 35 d. The results showed that compared with control group, the feed conversion rate of dairy cows in test group was increased by 2.18%. Milk yield of dairy cows in test group was increased by 0.35%, 11.31%, 2.89%, 3.10%, 1.83% and 3.84% on the 7th, 14th, 21th, 28th and 35th day and the whole process, respectively. Milk yield of dairy cows on the 14th day increased significantly. Milk fat percentage and milk protein of dairy cows in test group were slightly lower. Somatic cell number and persistence of dairy cows in test group were increased slightly. Urea nitrogen of dairy cows in test group was decreased slightly. The average economic benefit in each cow per day of dairy cows in test group was increased by 8.24%. The experiment indicates that adding calcium zinc mixture in total mixed diet has no significant effect on feed conversion rate, tends to improve milk yield in a certain stage, which has no significant effect on milk quality, can improve economic benefit. [ABSTRACT FROM AUTHOR]

The experiment studied the effect of feed the stem and leaf of Glycyrrhiza uralensis on ruminal fermentation and microbial populations in dairy cow. 20 healthy (258±12) d Holstein dairy cows were used in a paired design with milk yield, lactation time and parity, which divided into control group (alfalfa group) and test group (stem and leaf of Glycyrrhiza uralensis group) with ten replicates in each group. The experimental period was 28 d. The results showed that the stem and leaf of Glycyrrhiza uralensis extremely increased the concentration of acetic acid, propionic acid and valeric acid (P<0.01), significantly increased the concentration of butyric acid (P<0.05), and significantly decreased the acetic/propionic (P<0.05). The stem and leaf of Glycyrrhiza uralensissignificantly decreased the number of Ruminococcus albus, Genus Ruminococcus and Butyrivibrio fibrisolvens (P<0.05), and extremely decreased the number of Ruminococcus flavefaciens (P<0.01). The study indicates that the stem and leaf of Glycyrrhiza uralensis instead of alfalfa to feed dairy cows has an inhibitory effect on the Ruminococcus albus, Ruminococcus flavefaciens, Butyrivibrio fibrisolvens and Genus Ruminococcus in the rumen fluid, and improves the rumen parameters of dairy cows, which is beneficial to improve the utilization efficiency of feed. [ABSTRACT FROM AUTHOR]