It is of practical significance to control the excessive vegetative growth of soybean during the rainy season, which causes a reduction in yield. In this study, we adopted soybean flax ridge-furrow intercropping system in order to constrain soybean’s excessive vegetative growth by interspecific competition between intercrops and estimated the growth, photosynthesis and yield of soybean. Two-year-experiment was conducted in 2018 and 2019 in the experimental farm of KIM IL SUNG University. Soybean seeds were grown in ridges and flax seeds were in furrows between ridges. During the co-growth stage, the early growth of soybean intercropped with flax was depressed by interspecific competition. At 45 days after soybean sowing, just before flax harvest, the average height and stem diameter of intercropped soybean plant were 22.5 cm and 0.7 mm shorter than those of sole cropped soybean plant, respectively. At the reproductive growth stage, the height of intercropped soybean plant was still 18.5 cm shorter than sole cropped soybean, while other agronomic parameters, including leaf area index (LAI), dry matter per plant, photosynthetic rate and chlorophyll contents, were greater for intercropped soybean. This led to higher yield of soybean (118.5%) and land equivalent ratio (LER) (203.5%) in ridge-furrow intercropping, as compared to sole cropping. Our results suggest that ridge-furrow intercropping system can be an effective way to constrain soybean’s excessive vegetative growth during the rainy season and improve soybean seed yield and LER.

控制雨季大豆营养生长过度导致产量下降具有现实意义。本研究采用大豆亚麻垄沟间作系统，通过间作间种间竞争来抑制大豆的过度营养生长，并对大豆的生长、光合作用和产量进行估计。2018年和2019年在KIM IL SUNG的实验农场进行了为期两年的实验大学。大豆种子生长在山脊中，亚麻种子生长在山脊之间的犁沟中。在共生阶段，大豆与亚麻间作的早期生长受到种间竞争的抑制。在大豆播种后 45 天，即亚麻收获前，间作大豆植株的平均高度和茎粗分别比单作大豆植株短 22.5 厘米和 0.7 毫米。在生殖生长阶段，间作大豆株高仍比单作大豆矮18.5 cm，而其他农艺参数，包括叶面积指数（LAI）、单株干物质、光合速率和叶绿素含量，间作时较大。大豆。这导致在垄沟间作中大豆产量（118.5%）和土地当量比（LER）（203.5%）更高，与单一种植相比。我们的研究结果表明，垄沟间作系统可以有效地抑制雨季大豆过度营养生长，提高大豆种子产量和LER。