The aim of this study was to evaluate the effect of adding different concentrations of either urea or NaOH in dehydrated acerola (Malpighia emarginata) fruit residue (DAFR) on chemical composition, in vitro rumen degradability, and gas and methane production. A completely randomized design was used with the following seven treatments: control, without chemical treatment, or pretreatment of DAFR with urea or NaOH at 20, 40, or 60 g/kg dry matter (DM). DM degradability and gas and methane production of DAFR were evaluated by semi-automated in vitro gas production technique. DAFR treated with urea or NaOH at concentrations of 40 and 60 g/kg DM decreased its neutral detergent fiber (P = 0.0115) and lignin (P < 0.0001) content, and this reduction was greater with the highest concentration (60 g/kg DM). In all tested concentrations, urea and NAOH were effective to increase the DM effective degradability of DAFR compared with the control treatment, although treatments with a concentration of 60 g/kg DM presented the highest values (P < 0.0001). Treatment of DAFR with NaOH or urea at 60 g/kg DM promotes greater lignin solubilization and DM degradability and lower gas and methane production in in vitro rumen fermentation.

中文翻译：

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针叶果（Malpighia emarginata）水果残渣的氢氧化钠或尿素预处理可提高干物质在体外瘤胃发酵中的可降解性并减少甲烷的产生。

这项研究的目的是评估在脱水西印度虎（Malpighia emarginata）水果残渣（DAFR）中添加不同浓度的尿素或NaOH对化学成分，体外瘤胃可降解性以及气体和甲烷产生的影响。使用完全随机的设计进行以下七个处理：对照，不进行化学处理，或使用尿素或NaOH以20、40或60 g / kg干物质（DM）预处理DAFR。通过半自动体外产气技术评估了DMFR的DM降解性以及产气和产甲烷。用40或60 g / kg DM的尿素或NaOH处理的DAFR降低了其中性洗涤剂纤维（P = 0.0115）和木质素（P <0.0001）的含量，当最高浓度（60 g / kg DM）时，该减少量更大）。在所有测试浓度下 与对照组相比，尿素和NAOH有效提高了DAFR的DM有效降解能力，尽管浓度为60 g / kg DM的处理表现出最高值（P <0.0001）。用60 g / kg DM的NaOH或尿素处理DAFR可以提高木质素的溶解度和DM的可降解性，并降低体外瘤胃发酵中气体和甲烷的产生。