【摘要】 [目的]为氮、磷、钾肥在小麦生产中的科学施用提供理论与技术依据。[方法]以扬麦12为供试品种,采用"3414"最优回归设计研究不同施肥方案对小麦经济性状和产量的影响,并通过拟合三元二次和一元二次肥效模型,确定小麦的最佳推荐施肥量。[结果]施氮、磷、钾肥小麦的增产率分别为306.50%、8.49%和4.24%;不施氮、磷、钾肥小麦的相对产量为24.60%、92.17%和95.93%。土壤地力贡献率为21.82%,萧山区土壤氮、磷、钾的丰缺等级分别为极低、中、高。[结论]在该试验条件下,施氮效果最好,磷肥次之,钾肥有一定增产增收效果;结合当地生产实际,确定氮、磷、钾肥最佳经济推荐施用量分别为266.40、73.20、53.70kg/hm2。更多还原

【Abstract】 [Objective] The aim was to provide the theoretical and technical basis for scientific application of nitrogen,phosphorus and potassium fertilizer on wheat.[Method] The effect of the different fertilization program on economic trait and yield of wheat variety Yangmai12 was experimented with the optimal regression design("3414") and the recommended fertilization for wheat was determined.[Result] The yield increase rates of wheat fertilized with nitrogen,phosphorus and potassium were 306.50%,8.49% and 4.24%.The relative yields of wheat fertilized without nitrogen,phosphorus or potassium were 24.60%,92.17% and 95.93%.The fertility rate was 21.82%.The levels of abundance or deficiency of nitrogen,phosphorus and potassium in soils were extremely low,middle and high,respectively.[Conclusion] In the experimental condition,the nitrogen fertilization could result in the best efficiency.Then the phosphorus and last the potassium,for a certain effect on wheat yield-increasing.Combined with local production practice,the best economic N,P and K fertilization recommended was 266.40,73.20 and 53.70 kg/hm2,respectively.更多还原