Cell wall-bound hydroxycinnamic acids and the composition of lignin were studied in relation to the digestibility of a collection of 91 maize silages in wethers. Total lignin and guaiacyl content showed the highest correlation coefficients with digestibility. Using the above-mentioned chemical parameters, eight equations were also developed to predict digestibility. The prediction of organic matter digestibility produced a high adjusted R 2 value (0.487) using total lignin, guaiacyl, esterified ferulic acid and esterified p-coumaric acid content as predictors. The prediction of in vivo dry matter digestibility produced a higher adjusted R 2 value (0.516) using the same variables as predictors. Cell wall digestibility depends on a multiplicity of factors and it is not possible to attribute a causal effect on in vivo digestibility to any single factor. However, total lignin, guaiacyl and p-coumaric acid content emerge as good predictors of digestibility.

中文翻译：

---

绵羊玉米青贮饲料羟基肉桂酸含量、木质素组成与消化率的关系

研究了细胞壁结合的羟基肉桂酸和木质素的组成与 91 种玉米青贮饲料的消化率之间的关系。总木质素和愈创木酚含量与消化率的相关系数最高。使用上述化学参数，还开发了八个方程来预测消化率。使用总木质素、愈创木酰、酯化阿魏酸和酯化对香豆酸含量作为预测因子，对有机物质消化率的预测产生了高调整 R 2 值 (0.487)。使用与预测变量相同的变量，体内干物质消化率的预测产生了更高的调整 R 2 值 (0.516)。细胞壁消化率取决于多种因素，不可能将体内消化率的因果效应归因于任何单一因素。然而，总木质素、愈创木酚和对香豆酸含量成为消化率的良好预测指标。