Maize /potato intercropping system can increase production and efficiency,and the underlying mechanism has been extensively studied.Previous studies mainly focused on the productivity,economic and ecological aspects of the intercropping system,but the study of intercropping maize on growth of potato was limited in number.In the study,we aims to analyze a maize and potato intercropping field experiment with two different maize-potato row ratios (2∶2 and 4∶4)and potato monoculture.The measured parameters include plant height (PH),leaf area (LA),specific leaf weight (SLW),dry matter weight,and economic yield at early flowering and harvest,indicating the potato growth advantage, yield formation and competitiveness at different growth stages.The results showed that LA,SLW,plant biomass (PBM) and tuber biomass (TBM)of first row potato neighbor maize in the 2∶2 and 4∶4 intercropping system were higher than the second row potato partition maize in the 4∶4 intercropping system and monoculture,but PH and leaf weight ratio (LWR) were not significantly different at early flowering.During harvest period,PH,LA and TBMof first row potato neighbor maize in the 2∶2 and 4∶4 intercropping system were larger than the second row potato partition maize in the 4∶4 inter-cropping system and monoculture,but SLW was lower than monoculture treatment.The transfer rate and contribution rate of stems biomass and leaves biomass transferred to potato tubers in the intercropping system was higher than monoculture. Space expansion of first row potato to neighbor maize in the 2∶2 and 4∶4 intercropping system was stronger than maize at early flowering,then the first row potato neighbor maize was higher than the second row potato partition maize,when at harvest the advantage of space expansion was disappear.The potato yield of first row potato neighbor maize in the 2 ∶2 and 4∶4 intercropping system was higher than monoculture,but the potato yield performance of second row potato parti-tion maize in the 4∶4 intercropping system was inconsistent between 2 years.These findings suggest that intercropping ad-vantage of leaf area,biomass and yield setting at early stage resulted in higher potato yield.%玉米‖马铃薯作为一种传统的间作方式，能提高产量效益和土地利用率。本研究以玉米、马铃薯不同行比间作模式作为研究对象，在大田条件下测定初花期和收获期马铃薯株型指标、干物质及产量，评价马铃薯在收获期和生育期的生长特性、产量形成及竞争力。结果表明：在初花期2∶2和4∶4间作模式边一行叶面积、比叶重、植株干物重及块茎干物重均大于4∶4间作模式边二行和单作，株高和叶重比规律不明显。在收获期2∶2和4∶4间作模式边一行株高、叶面积和块茎干物重大于4∶4间作处理边二行和单作，比叶重反而小于单作处理。间作模式马铃薯茎叶干物质向块茎的转移率和对经济产量的贡献率高于单作模式。初花期间作处理马铃薯竞争力大于玉米，且边一行竞争力大于边二行，收获期间作处理马铃薯竞争力弱小于玉米。与单作相比，间作模式边一行马铃薯表现出产量优势，4∶4间作模式边二行马铃薯在2012年表现出产量优势，而在2013年表现出产量劣势。综合以上结果，生育前期间作模式边行马铃薯在叶面积、茎叶干物质和块茎干物质积累了较大的间作优势，随着生育期推移间作优势逐渐降低，收获时仍表现出一定的产量优势。
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