Hubbard Michelle, Thomson Madeleine, Menun Alexander, May William E, Peng Gary, Bainard Luke D
Swift Current Research and Development Center, Agriculture and Agri-Food Canada, Swift Current, SK, Canada.
Indian Head Research Farm, Agriculture and Agri-Food Canada, Indian Head, SK, Canada.
Front Plant Sci. 2023 Jul 28;14:1120435. doi: 10.3389/fpls.2023.1120435. eCollection 2023.
In the Canadian prairies, pulse crops such as field pea ( L.) and lentil ( L.) are economically important and widely grown. However, in recent years, root rot, caused by a variety of fungal and oomycete pathogens, including , has become a limiting factor on yield. In this study, we examined the impacts of nitrogen (N) fertilization and a commercial arbuscular mycorrhizal fungal (AMF) inoculant on pea and lentil plant health and agronomic production at three locations in Saskatchewan: Swift Current, Indian Head and Melfort. The AMF inoculation had no impact on root rot severity, and therefore is not considered a reliable method to manage root rot in pea and lentil. In contrast, N fertilization led to reductions in root rot in Swift Current, but not the other two sites. However, N fertilization did reduce nodulation. When both pea and lentil are considered, the abundance of in soil increased from pre-seeding to mid-bloom. A negative correlation between soil pH and disease severity was also observed. The high between-site variability highlights the importance of testing root rot mitigation strategies under multiple soil conditions to develop site-specific recommendations. Use of N fertilizer as a root rot management strategy merits further exploration, including investigation into its interactions with other management strategies, soil properties, and costs and benefits.
在加拿大草原地区，诸如豌豆（L.）和小扁豆（L.）等豆类作物具有重要的经济价值且广泛种植。然而，近年来，由包括 在内的多种真菌和卵菌病原体引起的根腐病已成为产量的限制因素。在本研究中，我们在萨斯喀彻温省的三个地点：斯威夫特卡伦特、印第安海德和梅尔福特，研究了氮肥施用和一种商业化丛枝菌根真菌（AMF）接种剂对豌豆和小扁豆植株健康及农艺产量的影响。AMF接种对根腐病严重程度没有影响，因此不被认为是管理豌豆和小扁豆根腐病的可靠方法。相比之下，氮肥施用在斯威夫特卡伦特减少了根腐病，但在其他两个地点没有。然而，氮肥施用确实减少了根瘤形成。当同时考虑豌豆和小扁豆时，土壤中 的丰度从播种前到盛花期增加了。还观察到土壤pH值与病害严重程度之间呈负相关。不同地点之间的高变异性凸显了在多种土壤条件下测试根腐病缓解策略以制定因地制宜建议的重要性。将氮肥用作根腐病管理策略值得进一步探索，包括研究其与其他管理策略、土壤特性以及成本效益之间的相互作用。
