通过大田试验，研究了不同施氮量和密度对党参籽粒产量和农艺性状的影响。结果表明，不同施氮量和密度对党参籽粒产量有显著影响，在同一密度条件下，随着施氮量的增加党参籽粒产量、千粒重和根重随之增加，施氮量达到120 kg/hm2时达到最大值；不同密度之间相比，党参籽粒产量、千粒重和根重呈单峰趋势变化，密度为80万株/hm2时均达到最大值。说明在干旱半干旱的定西市，施氮量为120 kg/hm2、密度为80万株/hm2为党参最佳种植组合。

A Field experiments were conducted to study the different N application rate and density on grain yield and agronomic traits of Codonopsis pilosula. The results showed that the different nitrogen amount and density of Codonopsis pilosula has remarkable effect on the grain yield under the condition of the same density， with the increase of N application Codonopsis pilosula grain yield， 1000-grain and root weight increases， reaching the maximum when the N application rate of 120 kg/hm2； Compared with different densities， the grain yield weight， 1 000-grain and root weight of Codonopsis pilosula presented a unimodal trend of change， reaching the maximum when the density was 800，000 plants/hm2. It indicated that the optimal Codonopsis pilosula planting combination was the nitrogen application rate of 120 kg/hm2 and the density of 800，000 plants/hm2 plants in the arid and semi-arid Dingxi City.

S567.5

现代农业产业技术体系建议专项资金资助(CARS-21)，定西市科技局项目“定西市道地中药材新品种选育及推广”(DX2020N10)。