甘南高寒阴湿区宽幅匀播青稞“3414”肥效试验

为了将宽幅匀播技术与“3414”肥效试验相结合，应用于甘南高寒阴湿区青稞种植与示范推广中，推动该地区青稞种植产业发展。采用“3414”最优回归设计，以青稞甘青9号为指示品种，在宽幅匀播条件下研究了“3414”肥效试验对青稞生长及产量的影响，并建立了青稞产量与氮、磷、钾施量之间的肥效回归方程，以提高肥效，促进甘南高寒阴湿区青稞生产优质高产。结果表明，宽幅匀播条件下，甘青9号最佳产量为6 640.32 kg/hm2时，施肥量为N 36.34 kg/hm2、P2O5 55.86 kg/hm2、K2O 7.09 kg/hm2；最大产量为6 834.09 kg/hm2时，施肥量为N 80.66 kg/hm2、P2O5 62.31 kg/hm2、K2O 16.58 kg/hm2。肥效回归方程中施肥量与青稞产量拟合度显著，可应用于大田生产。

Fertilizer Effect of ''3414'' Experiment on Highland Barley using Wide-width Uniform Sowing in Gannan Alpine Humid Areas

In order to combine the wide-width uniform sowing technology with ''3414'' fertilizer efficiency test, to apply it to the highland barley planting and demonstration promotion in Gannan alpine humid areas, and to promote the development of highland barley planting industry in this region, the experiment adopted the ''3414'' optimal regression design and used Ganqing 9 as the indicator variety to investigate the impact of the ''3414'' fertilizer efficiency trial on the growth and yield of highland barley under wide-width uniform sowing conditions. A fertilizer efficiency regression equation was established between the yield of highland barley and the application rates of nitrogen, phosphorus, and potassium, to enhance fertilizer efficiency and promote high-quality and high-yield highland barley production in the alpine humid areas of Gannan. The results showed that under wide-width uniform sowing conditions, the optimal yield for Ganqing 9 was 6 640.32 kg/ha, with fertilizer application rates of N, P2O5 and K2O at 36.34 kg/ha, 55.86 kg/ha and 7.09 kg/ha, respectively. The maximum yield was 6 834.09 kg/ha, with application rates of N, P2O5 and K2O at 80.66 kg/ha, P2O5 62.31 kg/ha and K2O 16.58 kg/ha, respectively. The fit between the fertilizer application rates and yield in the fertilizer efficiency regression equation was significant, making it applicable to field production.