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为探讨小群体栽培条件下水稻品种的生育及产量构成特征．１９９１～１９９５年进行了水稻小群体栽培品种试验，根据所获得的生育期和产量结构方面的资料分析表明，在寒地高纬度（北纬４６°～４８°）稻区，小群体栽培高产水稻理想的生育和产量特征是：主茎叶片数为１１．２～１１．８片，本田生育日数为９９～１１３ｄ（其中结实日数为３４～４０ｄ），每平方米穗数３５０～４５０穗．每穗颖花数８０～１００个，结实率为８５％～９５％，千粒重２７～３３ｇ．通过模型筛选出的品种，公顷产量超过９．０ｔ的机率达７５％．
In order to explore the characteristics of fertility and yield components of rice cultivars under the condition of small population cultivation. From 1991 to 1995, experiments were carried out on small-sized rice cultivars. According to the obtained data of growth period and yield structure, it was found that in the cold area with high latitudes (latitude 46 ° ~ 48 °) The yield and yield characteristics of the main stems were as follows: the number of main stem leaves was 11.2-11.8, the number of Honda reproductive days was 99-113d (the number of sturdy days was 34-40d), and the number of spikes was 350-450 spikes per square meter. Spikelets per spike 80 to 100, seed setting rate of 85% to 95%, grain weight 27 ~ 33g. The varieties screened through the model have a 75% probability of producing more than 9.0t ha.