Hartemink Ellen, Giorgio Daniela, Kaur Ravneet, Di Trana Adriana, Celi Pietro
Faculty of Veterinary Science, The University of Sydney, PMB 4003, Narellan, NSW 2567, Australia ; Department of Farm Animal Health, Faculty of Veterinary Science, Utrecht University, Yalelaan 7, 3584CL Utrecht, the Netherlands.
Scuola di Scienze Agrarie, Forestali, Alimentari ed Ambientali (SAFE), Università degli Studi della Basilicata, Viale dell'Ateneo Lucano 10, Potenza, 85100, Italy.
Asian-Australas J Anim Sci. 2015 Nov;28(11):1606-13. doi: 10.5713/ajas.15.0206.
This study was carried out to investigate the effects of Yerba Mate (YM) supplementation on nutrients' degradation, in vitro dry matter disappearance, gas production and rumen ammonia concentration. Three rumen-fistulated Holstein Friesian cows were used for the in situ incubations and provided rumen liquor for in vitro incubations. The inclusion of YM in a control diet (pasture+pellets) affected some in sacco degradation parameters. YM supplementation decreased the effective degradability and degradation rate of pasture crude protein (CP), and it seems to slow down the degradation of pasture neutral detergent fiber. A significant increase of degradation of pasture acid detergent fiber (ADF) was detected after YM inclusion in the control diet. YM supplementation reduced in vitro gas production of pasture and ammonia concentration of pellets. The addition of YM in ruminant diet could decrease ammonia production and increase protein availability for productive purposes. The moderate presence of tannins in YM could have affected the degradation kinetics of pasture CP and ADF and the ammonia production of pellets.
本研究旨在探讨添加马黛茶（YM）对营养物质降解、体外干物质消失率、产气量和瘤胃氨浓度的影响。选用3头装有瘤胃瘘管的荷斯坦弗里生奶牛进行原位培养，并提供瘤胃液用于体外培养。在对照日粮（牧草+颗粒料）中添加YM会影响一些瘤胃内降解参数。添加YM降低了牧草粗蛋白（CP）的有效降解率和降解速率，似乎减缓了牧草中性洗涤纤维的降解。在对照日粮中添加YM后，检测到牧草酸性洗涤纤维（ADF）的降解显著增加。添加YM降低了牧草的体外产气量和颗粒料的氨浓度。在反刍动物日粮中添加YM可减少氨的产生，并提高用于生产目的的蛋白质利用率。YM中适度含量的单宁可能影响了牧草CP和ADF的降解动力学以及颗粒料的氨生成。
