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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 conducted to study the silage mulberry on growth performance, slaughter performance, amino acid and fatty acid content of longissimus dorsi muscle of Hu sheep. A total of 24 healthy male Hu sheep with similar birth date, parity and weight were randomly divided into two groups, with three replicates in each group and four sheep in each replicate. The sheep in control group were fed with 50% peanut vine + 50% concentrate diet, the sheep in F group were fed with 40% peanut vine + 10% silage mulberry + 50% concentrate diet. The feeding trial lasted for 60 d. The results showed that compared with control group, the average daily gain of sheep in F group was extremely increased (P<0.01), feed to gain ratio was extremely reduced (P<0.01), carcass weight, slaughter rate, net meat weight, meat percentage and eye muscle area were significantly or extremely increased (P<0.05 or P<0.01). Compared with control group, the pH45 min, pH24 h, a45 min and a24 h of meat in F group were significantly or extremely increased (P<0.05 or P<0.01). The content of total amino acids, fresh amino acids, sweet amino acids and essential amino acids in longissimus dorsi muscle in F group were extremely increased (P<0.01). The content of heptadecenoic acid, oleic acid, α-linolenic acid, monounsaturated fatty acid and unsaturated fatty acid in longissimus dorsi muscle of F group were significantly or extremely increased (P<0.05 or P<0.01). The total content of carmyoleic acid, pentacarbonate, palmitic acid, heptadacarbonate, stearic acid and saturated fatty acid were significantly or extremely decreased (P<0.05 or P<0.01). The experiment indicates that the addition of 10% silage mulberry can improve the growth performance, slaughter performance, optimize the composition of amino acid and fatty acid in muscle of Hu sheep and improve the nutritional value of muscle. [ABSTRACT FROM AUTHOR]