[Contribution of nutrient uptake and utilization on yield advantage in maize and potato intercropping under different nitrogen application rates].

Intercropping of maize and potato, as an important intercropping planting pattern, has a prominent advantage of resource utilization and yield. However, contribution of nutrient uptake and utilization to crop yield advantage and its response to N application rates remain unclear. Through a 2-year plot experiment, including maize monoculture, potato monoculture and maize intercropping with potato at 4 N-fertilized levels of N(0 kg·hm), N(125 kg·hm), N(250 kg·hm) and N(375 kg·hm), nutritional contribution of yield advantage of intercropping was studied.