施氮量对玉米花生带状间作系统玉米产量及氮素吸收的影响

Effect of Nitrogen Application on Yield and Nitrogen Uptake in Maize-Peanut Strip Intercropping System

为优化玉米花生带状间作系统氮肥管理,于2019-2020年在山东省济南市开展连续两年的大田试验,研究不同施氮量下(N0:不施氮;N1:127.5 kg/hm^(2);N2:200 kg/hm^(2);N3:272.5 kg/hm^(2))间作系统玉米产量效应、氮素吸收利用及间作边行效应。结果表明,N0条件下间作系统的氮肥偏生产力最高,氮肥农学效率、地上部吸氮量和产量均以N2间作条件下最高。随着施氮量增加,间作边行玉米子粒产量优势逐渐降低,不施氮时边行贡献率最高,为74.23%~74.78%。

In order to optimize nitrogen fertilizer management in the intercropping system of maize and peanut,two consecutive field experiments were conducted in Jinan City,Shandong Province from 2019 to 2020.The effects of different nitrogen application rates(N0:0;N1:127.5 kg/ha;N2:200 kg/ha;N3:272.5 kg/ha)on maize yield,nitro⁃gen absorption and utilization,and intercropping border row effects were studied.The results showed that the nitro⁃gen fertilizer partial productivity of the intercropping system was the highest under N0 conditions,with the highest nitrogen fertilizer agronomic efficiency,aboveground nitrogen uptake,and yield under N2 intercropping conditions.As the nitrogen application rate increases,the yield advantage of intercropping edge row maize gradually decreases.Without nitrogen application,the contribution rate of border row is the highest,ranging from 74.23%to 74.78%.