As a new type of methane control agent, natural plant extract has been widely studied in recent years,but in vivo studies are few. This study was to investigate the effects of the dietary supplementation of 2 differen...As a new type of methane control agent, natural plant extract has been widely studied in recent years,but in vivo studies are few. This study was to investigate the effects of the dietary supplementation of 2 different polyphenols on the methane（CH4） emission and digestion metabolism in sheep. Ten healthy crossbred sheep（Dorper（?）× small-tailed Han ♀; BW 60.0 ± 1.73 kg） were used in a change-over design.The sheep were fed the following 3 diets in the present study: the basal diet（CON） with no supplementation; the basal diet supplemented with 2 g mulberry leaf flavonoid（MLF） per day per sheep; the basal diet supplemented with 0.25 g resveratrol（RES） per day per sheep. Both MLF and RES reduced CH4 emission scaled to metabolic weight per kilogram of DMI and CO2 output scaled to metabolic weight, but the effect of RES was significant（P < 0.05）. Both MLF and RES significantly improved apparent digestibility of DM, OM, NDF, ADF, and nitrogen, but the effect of RES was significant（P < 0.05）. Both MLF and RES significantly improved ME（P < 0.05） and reduced energy losses in CH4 emission（P > 0.05）. In conclusion, MLF and RES can improve the digestibility of nutrients, the utilization of nutrients and energy, and reduce CH4 emission, but they are not conducive to nitrogen retention.展开更多
本研究通过测定棉秆部位比例及其概略养分、绵羊对棉秆消化率、绵羊对棉秆饲粮的自由采食量、消化代谢和饲喂棉秆饲粮对绵羊生长、屠宰性能、羊肉安全的影响,旨在对棉秆的饲料特性、营养价值与棉秆饲粮营养价值及饲喂棉秆饲粮的绵羊羊...本研究通过测定棉秆部位比例及其概略养分、绵羊对棉秆消化率、绵羊对棉秆饲粮的自由采食量、消化代谢和饲喂棉秆饲粮对绵羊生长、屠宰性能、羊肉安全的影响,旨在对棉秆的饲料特性、营养价值与棉秆饲粮营养价值及饲喂棉秆饲粮的绵羊羊肉安全性进行综合评价。本研究中试验1测定棉秆不同部位比例及概略养分;试验2在限饲条件下,以差数法测定绵羊对棉秆的表观消化率;试验3采用自身对照设计,以玉米秸秆饲粮为对照,测定绵羊对棉秆饲粮的消化代谢;试验4通过120 d的饲养试验,研究玉米秸秆饲粮和棉秆饲粮对绵羊生长及屠宰性能的影响,并测定棉秆饲粮组绵羊组织样中游离棉酚和主要农药残留含量。结果表明:1)棉秆中粗茎、细枝、叶和棉桃壳比例分别为31.48%、10.99%、17.12%和40.41%,棉秆的有机物、粗蛋白质、纤维素、半纤维素和木质素含量分别为90.03%、6.41%、34.76%、15.58%和10.29%。2)绵羊对棉秆干物质、有机物、粗蛋白质、纤维素、半纤维素、能量、钙和磷的表观消化率分别为38.24%、37.99%、1.58%、60.50%、58.13%、44.05%、57.76%和45.00%,消化能为10.28 M J/kg DM。3)饲喂棉秆饲粮绵羊的有机物、纤维素、能量的表观消化率比玉米秸秆饲粮分别低5.30%(P<0.05)、10.04%(P<0.05)和13.63%(P<0.01),钙、磷表观消化率极显著提高(P<0.01),饲喂2种饲粮绵羊的自由采食量和粗蛋白质表观消化率均无显著差异(P>0.05)。4)饲喂棉秆饲粮和玉米秸秆饲粮的绵羊平均日增重、胴体重和胴体瘦肉重均无显著差异(P>0.05)。饲喂棉秆饲粮的绵羊组织样中游离棉酚及主要农药残留含量的检测结果为均未检出。本研究表明,棉秆中棉桃壳、细枝和叶3部分比例之和约为70%,可采食、可利用部分资源量较大;棉秆是一种能量营养低于玉米秸秆、钙磷营养高于玉米秸秆的粗饲料,其木质素含量较高,粗蛋白展开更多
基金supported by the earmarked fund for the Modern Agro-Industry Technology Research System,China(CARS-39,200903006)To Build Healthy Farming Model and Demonstrate for Sheep(2012BAD39B05-3)
文摘As a new type of methane control agent, natural plant extract has been widely studied in recent years,but in vivo studies are few. This study was to investigate the effects of the dietary supplementation of 2 different polyphenols on the methane（CH4） emission and digestion metabolism in sheep. Ten healthy crossbred sheep（Dorper（?）× small-tailed Han ♀; BW 60.0 ± 1.73 kg） were used in a change-over design.The sheep were fed the following 3 diets in the present study: the basal diet（CON） with no supplementation; the basal diet supplemented with 2 g mulberry leaf flavonoid（MLF） per day per sheep; the basal diet supplemented with 0.25 g resveratrol（RES） per day per sheep. Both MLF and RES reduced CH4 emission scaled to metabolic weight per kilogram of DMI and CO2 output scaled to metabolic weight, but the effect of RES was significant（P < 0.05）. Both MLF and RES significantly improved apparent digestibility of DM, OM, NDF, ADF, and nitrogen, but the effect of RES was significant（P < 0.05）. Both MLF and RES significantly improved ME（P < 0.05） and reduced energy losses in CH4 emission（P > 0.05）. In conclusion, MLF and RES can improve the digestibility of nutrients, the utilization of nutrients and energy, and reduce CH4 emission, but they are not conducive to nitrogen retention.
文摘本研究通过测定棉秆部位比例及其概略养分、绵羊对棉秆消化率、绵羊对棉秆饲粮的自由采食量、消化代谢和饲喂棉秆饲粮对绵羊生长、屠宰性能、羊肉安全的影响,旨在对棉秆的饲料特性、营养价值与棉秆饲粮营养价值及饲喂棉秆饲粮的绵羊羊肉安全性进行综合评价。本研究中试验1测定棉秆不同部位比例及概略养分;试验2在限饲条件下,以差数法测定绵羊对棉秆的表观消化率;试验3采用自身对照设计,以玉米秸秆饲粮为对照,测定绵羊对棉秆饲粮的消化代谢;试验4通过120 d的饲养试验,研究玉米秸秆饲粮和棉秆饲粮对绵羊生长及屠宰性能的影响,并测定棉秆饲粮组绵羊组织样中游离棉酚和主要农药残留含量。结果表明:1)棉秆中粗茎、细枝、叶和棉桃壳比例分别为31.48%、10.99%、17.12%和40.41%,棉秆的有机物、粗蛋白质、纤维素、半纤维素和木质素含量分别为90.03%、6.41%、34.76%、15.58%和10.29%。2)绵羊对棉秆干物质、有机物、粗蛋白质、纤维素、半纤维素、能量、钙和磷的表观消化率分别为38.24%、37.99%、1.58%、60.50%、58.13%、44.05%、57.76%和45.00%,消化能为10.28 M J/kg DM。3)饲喂棉秆饲粮绵羊的有机物、纤维素、能量的表观消化率比玉米秸秆饲粮分别低5.30%(P<0.05)、10.04%(P<0.05)和13.63%(P<0.01),钙、磷表观消化率极显著提高(P<0.01),饲喂2种饲粮绵羊的自由采食量和粗蛋白质表观消化率均无显著差异(P>0.05)。4)饲喂棉秆饲粮和玉米秸秆饲粮的绵羊平均日增重、胴体重和胴体瘦肉重均无显著差异(P>0.05)。饲喂棉秆饲粮的绵羊组织样中游离棉酚及主要农药残留含量的检测结果为均未检出。本研究表明,棉秆中棉桃壳、细枝和叶3部分比例之和约为70%,可采食、可利用部分资源量较大;棉秆是一种能量营养低于玉米秸秆、钙磷营养高于玉米秸秆的粗饲料,其木质素含量较高,粗蛋白
