Abstract:

In order to explore effect of root exudates on nitrogen uptake of maize under different cropping patterns, in this study, in the condition of different activated carbon treatment, through the quartz sand culture experiment, study on the changes of a large bell and the maturity period of biomass and nitrogen uptake of maize under different cropping patterns. The results showed that the treatment with adding activated carbon treatment maize biomass and N uptake were decreased than that without, large bell during total biomass and total N uptake were decreased by 16.12% and 34.96%, but not significantly on maturity. Adding activated carbon, as the root exudates were adsorbed, leading to in both periods maize biomass and N uptake Inter-cropping between the two modes was no significant differences. While not adding activated carbon, soybean root exudates increased maize biomass and N uptake, on the maturity total biomass and total N uptake of maize under maize/soybean model were higher than maize net by 30.58% and 71.24%. Sweet potato root exudates reduced maize biomass and nitrogen uptake, the maturity under maize /sweet potato model in total biomass and total N uptake were lower than maize net by 17.14% and 8.30%.