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高肥力土壤条件下研究了氮磷钾对小麦产量和肥料利用率的影响。结果表明:增施氮肥能提高小麦分蘖,显著提高穗粒数等产量构成因素,随着施氮量的增加,小麦的产量逐渐增加,当施氮量在每亩21 kg时,小麦产量最高,继续增大氮肥用量,小麦产量不再增加。从氮素养分利用率分析,N7处理氮素利用率最高,N28处理的氮素利用率最低。从农学效率分析,N14处理的农学效率最高,K6处理农学效率最低。磷肥比钾肥农学效率高。在氮磷钾3因素中,小麦对氮肥具有最强的依赖性,占主导地位。
The effects of NPK on wheat yield and fertilizer utilization efficiency were studied under high-fertility soils. The results showed that the increase of nitrogen fertilizer could increase the tillering of wheat and significantly increase the yield components such as grain number per spike. With the increase of nitrogen application, the yield of wheat increased gradually. When the nitrogen application rate was 21 kg / acre, the yield of wheat was the highest, Continue to increase the amount of nitrogen fertilizer, wheat yield no longer increase. From the analysis of nitrogen nutrient utilization rate, nitrogen utilization efficiency of N7 treatment is the highest, N28 treatment nitrogen utilization efficiency is the lowest. From agronomic efficiency analysis, N14 treatment had the highest agronomic efficiency and K6 treatment had the lowest agronomic efficiency. Phosphorus fertilizer is more efficient than potash fertilizer. Among the three factors of NPK, wheat has strongest dependence on nitrogen fertilizer.