Abstract In recent years, the use of white-rot fungi as a pretreatment method to improve the nutritive value of agricultural biomass as ruminant feed, has received a substantial attention. However, there are several issues that need to be addressed for a successful application of this method. One of the issues is the inevitable variation in the nutritive values of the fungal-treated biomass. This paper reviews our recent works on validating the variation in the nutritive values of biomass treated with different fungal species. The general aims of these studies are: (1) to study the variability among different fungal species (and strains) in improving the nutritive value of the same batch of wheat straw; and (2) to assess the capabilities of selected fungi to improve different batches and types of wheat straw. A large variation of ruminal degradability – measured as in vitro gas production, IVGP), was observed, even for different strains of the same fungal species. The IVGP for different strains of Ceriporiopsis subvermispora ranged from 205.5 to 317.8 mL/g organic matter (OM), while the IVGP ranges for the strains of Lentinula edodes and Pleurotus eryngii were 183.5–306.6 ml/g OM) and 206.6–267.0 ml/g OM, respectively. A high potential fungus, strain CS1 of C. subvermispora consistently improved the IVGP of different batches and types of wheat straw by 27.7–47.6%. The variation in the nutritive value of fungal-treated biomass is evident. However, this issue can be overcome by using the right fungal strains with an optimal culture and growth conditions. More research needs to be done to make it an attractive substitute to physico-chemical methods. Here, we also put forward our manifestation on the future prospects of fungal pretreatment for ruminant feeding.

中文翻译：

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真菌预处理农业生物质反刍动物饲料的前景和可行性

摘要 近年来，利用白腐真菌作为反刍动物饲料提高农业生物质营养价值的预处理方法受到了广泛关注。但是，要成功应用此方法，还需要解决几个问题。问题之一是经过真菌处理的生物质的营养价值不可避免的变化。本文回顾了我们最近在验证用不同真菌物种处理的生物质的营养价值变化方面的工作。这些研究的总体目标是：（1）研究不同真菌种类（和菌株）在提高同一批次小麦秸秆营养价值方面的变异性；(2) 评估所选真菌对不同批次和类型小麦秸秆的改良能力。观察到瘤胃降解能力的巨大变化——以体外产气量 (IVGP) 衡量，即使对于相同真菌物种的不同菌株也是如此。Ceriporiopsis subvermispora 不同菌株的IVGP范围为205.5-317.8 mL/g有机质（OM），而香菇和杏鲍菇菌株的IVGP范围为183.5-306.6 ml/g OM）和206.0-206.6-2 g OM，分别。一种高潜力真菌 C. subvermispora 菌株 CS1 始终将不同批次和类型的小麦秸秆的 IVGP 提高 27.7-47.6%。真菌处理的生物质营养价值的变化是明显的。然而，这个问题可以通过使用具有最佳培养和生长条件的正确真菌菌株来克服。需要做更多的研究，使其成为物理化学方法的有吸引力的替代品。这里，