Nitrogen uptake, use and utilization efficiency by oat-pea intercrops

Grain N concentration of oat and pea increased with N fertilization. In intercrops, grain N concentrations of oat increased with lower oat share whereas those of pea were not affected by cropping system. Due to higher grain N concentrations of oat in intercrops, intercrops could attain a higher grain N yield in unfertilized treatments. Thus, growing oat-pea intercrops can be reasonable for producing grain feed at low N input level.