以杂交中籼稻徽两优5号为材料，研究不同机插株距（行距固定为30 cm）对其群体建成和产量形成的影响。结果表明，在机插株距为14 cm的条件下，徽两优5号产量构成因素协调，理论产量达到11 228.8 kg/hm2；群体茎蘖消长表现平稳，无效分蘖减少；抽穗至成熟期干物质生产量较高，占总干物质量的44.8%；基部节间短而粗，有利于降低徽两优5号在机插条件下的倒伏风险，从而发挥高产潜力。

The effects of different plant space on the population structure and yield formation with mechanical transplanting of mid-season indica rice Huiliangyou 5 were studied. The results showed that the theoretical yield of Huiliangyou 5 reached 11 228.8 kg/hm2 and its components were coordinate with the machine-transplanted space of 14 cm and fixed row space of 30 cm. The increase and decrease of the stems and tillers were smooth and the ineffective tillers decreased. The production of dry matter from heading to mature period increased with 44.8% to total dry matter production. The basal internodes were shortened and the stem diameter increased for decreasing the lodging risk of Hui Liangyou5 and fulfilling potential of high yield with mechanical transplanting.