Biological control of pathogenic Fusarium species through the promotion of detrital food webs is a promising option for agricultural production and could be of high value in organic farming. To obtain quantitative information on the impact of detrital subsidy on the development of Fusarium infection in winter wheat seedlings, we established a 60-day laboratory experiment in which the soil was amended with either a N-poor or a N-rich mixture of straw and compost containing the same amount of organic carbon (200 g C m⁻²).

Compared with the control treatment (no subsidy), shoot biomass decreased by 27% in the N-poor mulch treatment and increased by 24% in the N-rich mulch treatment. For both of the added mulch treatments, the population of mycophagous and predatory mites increased fivefold compared to the control. The abundance of Enchytraeidae also increased in both N-poor (by 68%) and N-rich (by 46%) mulch treatments.

Unexpectedly, the abundance of gene copies of total soil fungi and of genus Fusarium in particular, as well as the abundance of Fusarium-specific polysaccharide protein conjugate (FPPC), were not affected by either mulch addition. Nevertheless, wheat seedlings were not infected by Fusarium wilt in either mulch treatment, whereas in the control treatment, the infection incidence was about 9%.

The quantitative information obtained here may be important for the development of an ecological control method for cereal diseases caused by pathogenic Fusarium species.

通过促进碎屑食物网的生物控制病原性镰刀菌是农业生产的一个有前途的选择，在有机农业中可能具有很高的价值。为了获得有关碎屑补贴对冬小麦幼苗中镰刀菌感染发展的影响的定量信息，我们建立了一个为期60天的实验室实验，在该实验中，对土壤进行了N贫瘠或N丰富的秸秆混合物的改良。堆肥中含有相同数量的有机碳（200 g C m ^-2）。

与对照相比（无补贴），低氮覆盖处理的茎生物量下降了27％，而富氮覆盖处理的茎生物量增加了24％。对于两种添加的覆盖物处理，相比于对照，食蚁性和捕食性螨虫的数量增加了五倍。贫氮覆盖率（增加68％）和富氮覆盖率（增加46％）时，棘足科的丰富度也增加了。

出乎意料的是，两种覆盖物均不影响总土壤真菌特别是镰刀菌属的基因拷贝的丰度，以及镰刀菌特异性多糖蛋白结合物（FPPC）的丰度。然而，在任何一种覆盖处理中，小麦幼苗都没有被镰刀菌枯萎病感染，而在对照处理中，感染发生率约为9％。

此处获得的定量信息对于开发由病原性镰刀菌种引起的谷物疾病的生态控制方法可能很重要。