论文部分内容阅读
为探讨不同施肥水平与种植密度对玉米产量及氮素利用的作用效应,以玉米杂交种‘桂单0810’为材料,裂区设计,设置4个施肥水平和6个种植密度,进行一年两季田间试验。结果表明:不同施肥水平与不同种植密度对玉米产量都有显著的作用效应;随着施肥水平提高,氮素利用率、氮素农学效率、氮素生理效率均有所降低,同一施肥水平随密度增加,氮素利用率、氮素农学效率、氮素生理效率均有所提高,通过调节种植密度可以较好发挥氮素的作用效率;以(A2)施纯N 225.0 kg/hm2、P2O575.0 kg/hm2、K2O 187.5 kg/hm2与种植密度在(B3)52 500株/hm2至(B4)60 000株/hm2玉米产量可达7 913.2~8 207.8 kg/hm2是一种较优的密、肥配合选择。
In order to explore the effects of different fertilization levels and planting densities on the yield and nitrogen utilization of maize, the maize hybrid ’Guidan 0810’ was used as the material and the split zone was designed with four fertilizer levels and six planting densities. Quarter field trials. The results showed that different fertilization levels and different planting densities had a significant effect on the yield of maize. With the increase of fertilization level, the nitrogen use efficiency, nitrogen agronomic efficiency and nitrogen physiological efficiency decreased. The same fertilization level with the density (A2) application of N 225.0 kg / hm2, P2O575.0 (N 2), nitrogen use efficiency, N agronomic efficiency and N physiological efficiency were all improved by adjusting planting density. kg / hm2, K2O 187.5 kg / hm2 and planting density of 5200 plants / hm2 to (B4) 60 000 plants / hm2 maize could reach 7 913.2-8 207.8 kg / hm2, Fertilizer with the choice.