This experiment was conducted to study the effects of silage mulberry leaves replacing silage corn on growth performance,slaughter per-formance and rumen fermentation parameters of beef cattle.Forty Simmental cattle with body weight of(320.00±4.25)kg and age of(12±1)months were randomly divided into 4 groups.The cattle in the control group were fed the basal diet,and the cattle in groups Ⅰ,Ⅱ and Ⅲ were fed according to 15％,30％and 45％silage mulberry leaves instead of silage corn in the basal diet,respectively.The results showed as follows:the average daily feed intake of test group was lower than that of control group(P＜0.05),the average daily gain of group Ⅲ was lower than that of control group and group Ⅰ(P＜0.05),and group Ⅰ had the lowest ratio of feed to gain among all groups.The ratio of meat to bone of experimental group was higher than that of control group(P＜0.05),and the slaughter rate of group Ⅰ was higher than that of groups Ⅱ and Ⅲ(P＜0.05).Compared with control group,ammonia nitrogen(NH3-N),volatile fatty acid(VFA),acetic acid and acetic acid/propionic acid in experimental groups were increased(P＜0.05).Com-pared with the control group,the culture benefit of group Ⅰ was increased by 7.29％.Under the conditions of this experiment,although the feed intake and daily gain of Simmental cattle were reduced by silage mul-berry leaves instead of silage corn,the slaughter performance was improved,rumen fermentation was pro-moted,and the economic benefit of breeding was increased,and the appropriate supplemental amount was 15％.
The experiment was designed to investigate the modulating effect of Cangpu Wumei powder on the immune function of the organism.Cyclophosphamide was used to induce immunosuppression in mice,and different doses of Cangpu Wumei powder were administered to both immunosuppressed and normal mice via gavage.A total of 128 Kunming mice,half male and half female,were randomly divided into eight groups,with 16 mice in each group:The blank control group,the cyclophosphamide model group,the low-dose Cangpu Wumei powder group(0.8 g/kg BW),the medium-dose Cangpu Wumei powder group(1.6 g/kg BW),the high-dose Cangpu Wumei powder group(3.2 g/kg BW),the cyclophosphamide+low-dose Cangpu Wumei powder group,the cyclophosphamide+medium-dose Cangpu Wumei powder group,and the cyclophosphamide+high-dose Cangpu Wumei powder group.The experimental period lasted for seven days.The results showed that the administration of each dose of Cangpu Wumei powder for seven consecutive days could significantly increase the levels of interleukin-2(IL-2),interleukin-6(IL-6),immunoglobulin G(IgG),and interleukin-1β(IL-1β)in the serum of immunosuppressed mice,increase the body weight,spleen index,and thymus index of mice,and repair the atrophy of splenic follicles,unclear thymic structure,and necrosis of lymphocytes induced by cyclophosphamide,with the medium dose showing the best effect.The experiment shows that Cangpu Wumei powder can antagonise the immunosuppression induced by cyclophosphamide,repair the damage of spleen and thymus,and has an immune-enhancing effect.Based on the results of cytokines and histopathologic findings,the best dosage of Cangpu Wumei powder to enhance the immunological function in mice is 1.6 g/kg BW.
稻谷是我国第一大粮食作物,稻谷加工副产品产量巨大,大量的研究表明,其可以作为能量原料替代玉米在畜禽饲料中适量使用.文章主要总结了稻谷及其加工副产品的营养价值、与玉米的营养价值对比、稻谷中的生物活性因子及其在家禽饲粮中使用的研究进展,为科学利用稻谷及其加工副产品作为饲料原料提供依据.
胆汁酸(BAs)是胆汁的主要成分之一,已被作为非营养性饲料添加剂应用于水产养殖.文章回顾了饲料中添加BAs对鱼类生长、饲料利用、体形和体成分、脂质代谢、肠道菌群结构、肝肠健康等方面的影响,比较了不同BAs对鱼类作用效果的差异并分析了其潜在机制,总结了不同鱼类饲料中BAs的适宜添加量,以期为BAs的合理利用提供参考.
Lonicera japonica extract is a general name of bioactive substances with specific efficacy ex-tracted from Lonicera japonica,which mainly contains organic acids,flavonoids,iridoid glycosides and volatile oil compounds.It has many functions,such as anti-inflammatory,antioxidant,bacteriostasis and antivirus,enhancing immunity and so on,which provides a good application prospect for preventing live-stock and poultry diseases and improving livestock and poultry production performance in production ac-tivities.This paper mainly summarizes the main active components and physiological functions of Lonicera japonica extract and its application in livestock and poultry production,so as to provide reference for the further development of Lonicera japonica extract and its application in livestock and poultry production.
