The use of fruits waste from tanniniferous trees represents a new technology that aims to solve or mitigate greenhouse gases emission, and to increase the production of food of animal origin in an ecofriendly manner. This study aims to evaluate the production of methane and carbon dioxide, degradability by in vitro ruminal fermentation in goats diet supplemented with nuts (Caesalpinia coriaria Jacq. Willd.) for adoption by livestock farmers. Condensed tannins (CT) of C. coriaria inclusion rates were 0 (CT0 or control, no CT), 1.5 (CT1.5), 3.0 (CT3), 4.5 (CT4.5) and 6.0% (CT6) of the total mixed ration. All CT treatments reduced (linear, quadratic and cubic; P = 0.001) CH₄, CO₂ and H₂ gases, and had some increasing effect on total biogas production. However, CT3 reduced greenhouse gases and had the highest biogas production. Addition of tannins from cascalote fruit waste (C. coriaria Jacq. Willd.) to goats diet at CT3 level reduced methane production, improved fermentation and ruminal degradability in vitro and has potential to be used as ecofriendly feed or feed additive.

Graphic Abstract

中文翻译：

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Caesalpinia coriaria 果实废弃物的增值以提高瘤胃温室气体生产的减缓

使用来自鞣质树的水果废料代表了一种新技术，旨在解决或减轻温室气体排放，并以生态友好的方式增加动物源性食品的产量。本研究旨在评估添加坚果 ( Caesalpinia coriaria Jacq. Willd.) 的山羊日粮中甲烷和二氧化碳的产生、体外瘤胃发酵的降解性，以供牲畜养殖者采用。C. coriaria 的缩合单宁 (CT)为 0（CT0 或对照，无 CT）、1.5（CT1.5）、3.0（CT​​3）、4.5（CT4.5）和 6.0%（CT6）配给。所有 CT 处理都减少了（线性、二次和三次；P  = 0.001）CH ₄、CO ₂和 H ₂气体，并对总沼气产量产生了一些增加的影响。然而，CT3 减少了温室气体并具有最高的沼气产量。将来自 cascalote 水果废料 ( C. coriaria Jacq. Willd.)的单宁添加到 CT3 水平的山羊饲料中，可降低甲烷产量，改善体外发酵和瘤胃降解性，并有可能用作生态友好型饲料或饲料添加剂。

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