Effects of Soil Steam Sterilization on Red Clover, Its Associated Soil Microorganisms, and Mutualistic Symbionts Under Recurrent Drought土壤蒸汽灭菌对三叶草、其相关土壤微生物及共生互惠共生体在反复干旱条件下的影响Applied and Environmental Soil ScienceIF2.72026-01-010OAAI