内蒙古巴彦淖尔市大豆品种筛选与ARC微生物菌剂应用效果研究OA

In order to improve soybean yield,green production capacity and to clarify the application effect of ARC microbial agent,in Bayannur City,Inner Mongolia,field experiments were conducted in Urat Middle Banner in 2025.Three soybean varieties,including Zhongji 602,Heinong 87 and Kennong 23,were used in the variety screening experiment with randomized block design to determine agronomic traits and yield.The microbial agent experiment took Zhongji 602 with the best comprehensive performance as material,and set three treatments,ARC microbial agent,conventional soybean rhizobium agent and blank control to explore their effects on nodulation,nitrogen fixation and yield components.The results showed that Zhongji 602 had plant height of 93.82 cm,effective branches of 2.43,effective pods per plant of 42.2,seeds per plant of 120.20,and grain yield of 3 982.5 kg·ha-1,which were significantly higher than those of Heinong 87 and Kennong 23,with yield increased by 43.23％and 59.06％respectively.The ARC microbial agent treatment increased nodule number to 38.4 at flowering and podding stage,with an increase of 123.26％compared with the control.The effective pods per plant,seeds per plant and grain yield reached 56.12,143.44 and 4 342.38 kg·ha-1,increased by 32.99％,19.33％and 9.04％respectively compared with the control.The effects of promoting nodulation and increasing yield were better than those of conventional rhizobium agent.In conclusion,Zhongji 602 has excellent agronomic traits and high yield,suitable for the ecological conditions of Bayannur City.ARC microbial agent can significantly promote soybean nodulation and nitrogen fixation,optimize yield structure and increase grain yield.The combination of Zhongji 602 and ARC microbial agent can be used as the core technical model for large-scale promotion and application in local areas for green and high-yield efficient production of soybeans.