The soil microbial community is an essential biotic component in plant-soil feedback processes that can alter plant fitness, growth, and reproduction. Further, they may exert an influence on plants by forming a microbial association network. Accordingly, pronounced changes in the soil microbial community induced by climate warming is vital when evaluating the future risks on plants posed by global climate change. Although the climate warming issue has gained much attention for its impact upon soil microbial communities, attempts to identify its effects on their network associations through plant growth stages, especially in agroecosystems, remains limited and generally understudied. Here, the effects of elevated temperature in association with wheat plant growth upon soil bacteria, fungi, and arbuscular mycorrhizal (AM) fungi were determined in a field experiment. Our results revealed the alpha diversity of soil bacteria (ACE and Chao values) decreased through plant growth stages, while the relative abundances of bacteria and fungi between seeding time and mature stage were revealed significantly distinct in the PCA analysis. The derived microbial association network showed that warming could enhance the complexity of the network and wheat planting might weaken it. We also found the wheat planting and warming could increase the number of keystone species. Furthermore, the keystone species had the strongest relationship with the grain mass and quality of wheat. These findings could provide a better understanding of plant-soil feedback dynamics in wheat crops, along with those in other similar agroecosystems in the future under global climate change.

土壤微生物群落是植物-土壤反馈过程中必不可少的生物成分，可以改变植物的健康、生长和繁殖。此外，它们可能通过形成微生物关联网络对植物产生影响。因此，在评估全球气候变化对植物造成的未来风险时，气候变暖引起的土壤微生物群落的显着变化至关重要。尽管气候变暖问题因其对土壤微生物群落的影响而备受关注，但试图通过植物生长阶段（尤其是在农业生态系统中）确定其对其网络关联的影响的尝试仍然有限且普遍未得到充分研究。在这里，高温对小麦植物生长的影响对土壤细菌、真菌、和丛枝菌根 (AM) 真菌是在田间试验中测定的。我们的结果表明土壤细菌的 alpha 多样性（ACE 和 Chao 值）在植物生长阶段下降，而在 PCA 分析中，播种时间和成熟阶段之间细菌和真菌的相对丰度显着不同。衍生的微生物关联网络表明，变暖可以增强网络的复杂性，而小麦种植可能会削弱它。我们还发现小麦种植和气候变暖会增加关键物种的数量。此外，关键品种与小麦的粒重和品质的相关性最强。这些发现可以更好地了解小麦作物的植物-土壤反馈动态，