The study aimed to compare the effect of individual or combined supplementation of condensed tannins (Tamarindus indica) and saponins-containing (Sapindus mukorossi) phyto-sources on enteric methane emission in crossbred cattle. Twenty-four animals were divided into four groups of six each and fed on a finger millet straw and concentrate (70:30) based diet as follows: C (no tannins/saponins), T (tamarind seed husk supplemented group), S (soapnut supplemented group) and TS (tamarind seed husk and soapnut combined supplementation in 60:40). Individual (T, S) or combination (TS) of tamarind seed husk and soapnut constituted 51 g/kg of the basal diet. Present in vivo study revealed a significant reduction (∼20%) in enteric methane emission (g/d) with tamarind seed husk (T) or combined supplementation of tamarind seed husk and soapnut (TS). Furthermore, the comparison of methane emission on uniform basis (g/kg dNDF) also revealed a significant decrease with the individual supplementation of tamarind seed husk or combined supplementation. Therefore, tamarind seed husk alone or in combination with soapnut at above level can be used to formulate low methane emission diet. However, the efficacy of such diet in reducing enteric methane emission should be confirmed by conducting long duration trials in ruminants.

这项研究的目的是比较单独或联合添加缩合单宁（Tamarindus indica）和含皂苷（Sapindus mukorossi）的植物源对杂交牛肠道甲烷排放的影响。将二十四只动物分为四组，每组六只，并按以下方式喂食基于粟米和浓缩液（70:30）的饲料：C（无单宁/皂苷），T（罗望子籽壳补充组），S（ soapnutnut补充组）和TS（罗望子果皮和soapnut混合补充，比例为60:40）。罗望子种子果壳和皂仁的单独（T，S）或组合（TS）构成基础饮食的51 g / kg。目前体内研究表明，与罗望子种子壳（T）或罗望子种子壳和皂仁（TS）联合补充，肠甲烷排放量（g / d）显着降低（约20％）。此外，比较甲烷的统一排放量（g / kg dNDF），还显示出单独添加罗望子种子皮或联合添加时甲烷排放量显着降低。因此，单独使用罗望子种皮或与上述水平组合使用罗望子籽可用于配制低甲烷排放的日粮。但是，应通过在反刍动物中进行长期试验来证实这种饮食在减少肠内甲烷排放方面的功效。