针对超级早稻中组143播种量略高、分蘖力中等的问题，本试验设置3个播种量和4个施氮量处理，研究播种量和施氮量对其机插栽培产量的影响。结果表明，播种量与平均产量成正相关，产量随着播种量的增加而增加；施氮量与平均产量一定范围内成正相关，施氮量210 kg/hm²时平均产量达到最高值，高于此施氮量产量反而下降；播种量和施氮量双因子互作条件下，适量播种和适当增加氮肥用量有利于中组143机插获得高产，反之不利于高产，播种量120 g/盘、施氮量210 kg/hm²时平均产量最高。

The effect of seeding rate and nitrogen application on yield of machine-planted cultivation for super early rice variety Zhongzu 143 were studied with 3 seeding rates and 4 nitrogen rates treatments, for the variety had a slightly higher seeding amount and medium tiller power. The results showed that, the seeding rate was positively correlated with the average yield, and the yield increased with the increase of seeding rate. The nitrogen rate was positively correlated with the average yield within a certain range, and the highest yield was reached with nitrogen 210 kg/hm². From the double factor analysis of seeding rate and nitrogen rate, the highest yield obtained when seeding rate 120 g/plate and nitrogen rate 210 kg/hm².