Use of condensed tannin extract from quebracho trees to reduce methane emissions from cattle
Use of condensed tannin extract from quebracho trees to reduce methane emissions from cattle
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DOI：
10.2527/jas.2006-686
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发表时间：
2007-08-01
影响因子：
3.3
通讯作者：
McAllister, T. A.
中科院分区：
文献类型：
--
作者：
Beauchemin, K. A.;McGinn, S. M.;McAllister, T. A.
我们的目的是确定是否可以使用浓缩单宁提取物从白坚木树（Schinopsis quebracho科罗拉多州，红白坚木），以减少肠道甲烷排放量从牛。实验设计为重复的3 × 3拉丁方（4个正方形）与3个处理（0，1，和2%的膳食DM作为白坚木单宁提取物）和3个28天的时期。将6头已绝育的安格斯小母牛（238 +/- 13.3 kg初始BW）和6头安格斯阉牛（207 +/- 8.2 kg初始BW）分别分配至2个方格。测得的缩合单宁含量的提取物为91%，和基础日粮中含有70%的饲料（DM基础）。饲喂坚木单宁提取物对BW、ADG或营养素摄入量没有影响。此外，添加1%和2%的坚木栲胶对日粮干物质、能量和纤维（ADF和NDF）的消化率无影响，但对CP的表观消化率线性降低（P < 0.001），分别降低5%和15%。白坚木单宁提取物对甲烷排放量（g/d，g/kg DM，GE摄入量%或DE摄入量%）没有影响。饲料高达2%的膳食DM作为白坚木单宁提取物未能减少肠道甲烷排放量从生长牛，虽然白坚木单宁提取物的蛋白质结合效果是显而易见的。
Our objective was to determine if condensed tannin extract from quebracho trees (Schinopsis quebracho-colorado; red quebracho) could be used to reduce enteric methane emissions from cattle. The experiment was designed as a repeated 3 x 3 Latin square (4 squares) with 3 treatments (0, 1, and 2% of dietary DM as quebracho tannin extract) and 3 28-d periods. Six spayed Angus heifers (238 +/- 13.3 kg of initial BW) and 6 Angus steers (207 +/- 8.2 kg of initial BW) were each assigned to 2 squares. The measured condensed tannin content of the extract was 91%, and the basal diet contained 70% forage (DM basis). Feeding quebracho tannin extract had no effect on BW, ADG, or nutrient intakes. Furthermore, it had no effect on DM, energy, or fiber (ADF and NDF) digestibility, but apparent digestibility of CP decreased linearly (P < 0.001) by 5 and 15% with 1 and 2% quebracho tannin extract, respectively. There were no effects of quebracho tannin extract on methane emissions (g/d, g/kg of DM, % of GE intake, or % of DE intake). Feeding up to 2% of the dietary DM as quebracho tannin extract failed to reduce enteric methane emissions from growing cattle, although the protein-binding effect of the quebracho tannin extract was evident.