稻麦高产群体的主要生育特征为:在适宜叶面积基础上粒叶比高;分蘖成穗率高;有效叶面积和高效叶面积比例高;抽穗时单茎、鞘重量高;水稻结实期颖花根活量高.通过减苗、扩行、调肥和控水等技术可培育高产或超高产群体.对稻麦超高产指标体系和技术途径等进行了讨论. The main growth characteristics of high yielding population of rice and wheat were as follows: the ratio of grain to leaf was high on the basis of appropriate leaf area; the rate of tillering to ear was high; the ratio of effective leaf area to high efficiency leaf area was high; The root activity was high.Through the techniques of seedling reduction, expansion, fertilization and water control, high yield or super high yield population can be cultivated.The super high yield index system and technical methods of rice and wheat are discussed.