Abstract: 【Objective】 In order to clarify the best cultivation pattern of soybean in the southern foothills of Daxing′Anling in Inner Mongolia,and provide technical support and theoretical basis for soybean dense-planting cultivation in this area. 【Methods】 In 2017—2019,Mengdou No.13 was used as material,and three cultivation patterns of soybean were set as experimental treatments：planting on wide and high ridge,and three rows of ridge （110 cm wide ridge,RBH）,three rows of narrow furrow and dense-planting of ridge（three rows on 65 cm ridge,RNC）,and three rows of ridge cultivation（double rows on 65 cm ridge,CK）. The agronomic characters,SPAD value,leaf area index,dry matter accumulation and yield index of soybean were analyzed,the efficiency and income were calculated through the input-output accounting.【Results】 There was no significant difference in nutrient growth days,reproductive growth days,growth period and nodes number of main stem among the treatments（P>0.05）. The plant height and bottom pod height were RNC>RBH>CK. The effective branch numbers of CK was significantly higher than that of RNC and RBH（P<0.05）;SPAD value showed RBH>RNC>CK and increased gradually with growth period. At flowering period（R2）,pod setting period（R4） and seed filling period（R6）,SPAD value of RBH was significantly higher than RNC and CK（P<0.05）. Compared with CK,SPAD value of RBH increased 9.3%,7.0% and 8.6% respectively in 3 years. Leaf area index（LAI） increased gradually with growth period,maximum value of LAI reached at seed filling period,and then decreased gradually,the results showed RNC>RBH>CK and RNC increased LAI most significantly. Dry matter accumulation as RBH>RNC>CK and increased gradually with growth period. Pod number per plant,seed number per plant and seed weight per plant showed RBH>CK>RNC. No significant difference for 100 seed weight（P>0.05）. The theoretical yield and actual yield of soybean under different cultivation patterns showed RBH > RNC > CK, and there were significant differences among different treatments（P<0.05）. The theoretical yield and actual yield of soybean under RBH increased significantly and increase 665.2 kg/hm² and 403.0 kg/hm² respectively compared with RNC and CK in 2019. The income under different cultivation patterns showed RBH>RNC>CK,and the average income of RBH and RNC increased by 18.00%（1 392.0 yuan/hm²）and 2.67%（190.4 yuan/hm²）compared with CK.【Conclusion】 RBH（110 cm wide ridge） cultivation pattern for increasing soybean yield and efficiency in the southern foothills of Daxing′Anling in Inner Mongolia.

Key words: Soybean, Cultivation pattern, Agronomic trait, Dry matter accumulation, Leaf area index, Yield, Economic benefit