研究了不同施氮量和密度对党参产量和水分利用效率的影响。结果表明，不同施氮量和密度对党参一等品和二等品有显著影响。在同一密度下，随着施氮量的增加党参一等品和二等品显著增加，施氮量达到120 kg/hm2时一等品和二等品所占比例最高，党参产量和水分利用效率最大；同一施肥量下，党参一等品和二等品所占比例、产量以及水分利用效率均在密度为80万株/hm2时最高。综上，施氮量为120 kg/hm2，密度为80万株/hm2为试区党参栽培最佳肥密组合。

Effects of different N application rates and densities on the yield and water use efficiency of Codonopsis pilosula were studied. The results showed that different N application rates and densities had significant effects on the first and second grade Codonopsis pilosula yield. Under the condition of the same density, with the increase of N application the first and second grade yield of Codonopsis pilosula was the highest, when the N application rate of 120 kg/hm2, The yield and water use efficiency of Codonopsis pilosula were the highest. Under the same application rate, the proportion of the first and second grade products, the yield and the water use efficiency of density Cordonopsis pilosula were the highest when the density was 800 000 plants/hm2. In conclusion, 120 kg/hm2 of nitrogen application and 800,000 plants/hm2 of density are the optimum combination of fertilizer application and density for Codonopsis pilosula cultivation in the test area.

S567.23

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