摘要
The aim of this work was to evaluate the effect of quebracho tannins extract (QTE) on feed intake, dry matter (DM) digestibility, and methane (CH4) emissions in cattle fed low-quality Pennisetum purpureum grass. Five heifers (Bos taurus × Bos indicus) with an average live weight (LW) of 295 ± 19 kg were allotted to five treatments (0, 1, 2, 3, and 4% QTE/kg DM) in a 5 × 5 Latin square design. Intake, digestibility, and total methane emissions (L/day) were recorded for periods of 23 h when cattle were housed in open-circuit respiration chambers. Dry matter intake (DMI), organic matter intake (OMI), dry matter digestibility (DMD), and organic matter digestibility (OMD) were different between treatments with 0 and 4% of QTE/kg DM (P < 0.05). Total volatile fatty acid and the molar proportion of acetate in the rumen was not affected (P < 0.05); however, the molar proportion of propionate increased linearly (P < 0.01) for treatments with 3 and 4% QTE. Total CH4 production decreased linearly (P < 0.01) as QTE increased in the diet, particularly with 3 and 4% concentration. When expressed as DMI and OMI by CH4, production (L/kg) was different between treatments with 0 vs 3 and 4% QTE (P < 0.05). It is concluded that the addition of QTE at 2 or 3% of dry matter ration can decrease methane production up to 29 and 41%, respectively, without significantly compromising feed intake and nutrients digestibility. KeywordsGreenhouse gas Secondary compounds Ruminant nutrition
摘要译文
这项工作的目的是评估quebracho单宁提取物（QTE）对采食量，干物质（DM）消化率，和甲烷（甲烷）排放量低的牛饲料低质量Pennisetum purpureum草。将平均活体重（LW）为295±19 kg的五头小母牛（Bos taurus×Bos indicus）以5×5拉丁文分配给5次处理（0,1,2,3和4％QTE / kg DM）广场设计。录取，当牛被安置在开路呼吸室中时，记录23小时期间的消化率和总甲烷排放量（L /天）。干物质摄入量（DMI），有机物摄入量（OMI），干物质消化率（DMD）和有机物消化率（OMD）在QTE / kg DM 0％和4％处理之间不同（P 0.05）。总挥发性脂肪酸和瘤胃中乙酸的摩尔比例不受影响（P 0.05）;然而，丙酸的摩尔比例线性增加（P 0。01）用于治疗3％和4％QTE。随着QTE在日粮中的增加，总CH 4产量线性下降（P 0.01），特别是在浓度为3％和4％时。当用CH 4表示为DMI和OMI时，0与3和4％QTE之间的处理（L / kg）不同（P 0.05）。得出的结论是，添加2％或3％干物质量的QTE可将甲烷产量分别降低29％和41％而不会显着影响采食量和营养物消化率。关键词温室气体次生复合反刍动物营养
A. T. Piñeiro-Vázquez [1 [2] G. Jiménez-Ferrer [3 [4] J. A. Alayon-Gamboa [3 [4] A. J. Chay-Canul [5] A. J. Ayala-Burgos [1] C. F. Aguilar-Pérez [1] J. C. Ku-Vera [1]. Effects of quebracho tannin extract on intake, digestibility, rumen fermentation, and methane production in crossbred heifers fed low-quality tropical grass[J]. Tropical Animal Health and Production, 2018,50(1): 29-36