The effects of different transplanting density and seedling number per hole on yield and yield composition of rice were studied to improve per unit yield of rice in Pingtang County. The results showed that the rice yield under the cultivation pattern of 225 thousand holes/hm2 and two seedlings per hole was the highest in all treatments. The cultivation pattern of two seedlings per hole with suitable transplanting density could form the rational structure of spike number, full grain number and grain weight factors affecting rice yield by effectively coordinating the relationship between population and individuals of rice plants, improving population environment, reducing ineffective tillerings and increasing effective spike rate of tillerings.%为了提高平塘县水稻单产水平,结合水稻高产创建活动项目的实施,采用不同栽插密度与穴栽苗数研究其对水稻产量及构成因素的影响.结果表明:在平塘县水稻宽窄行栽插中,采用25 cm窄行,即密度为22.5万穴/hm2,每穴栽插2粒苗产量最高.穴栽2粒苗与适当密植能有效协调水稻群体与个体间的关系,改善群体环境,减少无效分蘖,提高分蘖成穗率,使影响水稻产量的穗数、稳实粒数和粒重三因素的构成较为合理.
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