Impact of Phosphorous Fertilization on Rape and Common Vetch Intercropped Fodder and Soil Phosphorus Dynamics in North China

This study explores the effect of phosphorus (P) fractions, under P addition or not, based on a common vetch-rape model cropping system in alkaline soil. A two year field experiment was conducted at Tuzuo Banner modern agricultural Park Inner Mongolia, China. Two levels, including P0 (no fertilizer) and P45 (45 kg·ha?1 P), were performed vetch rape either grown alone intercropped. We analyzed changes physicochemical properties fractions rhizosphere Intercropping enhanced yield by 42.05% 24.91%, average, compared with corresponding sole an equivalent area basis. The average land ratio (LER) 1.34. had significant AP concentration, 65.32% 33.99% level, 62.83% 36.19% respectively, to that rape. With application P, intercropping improved Resin-Pi NaHCO3-Pi fraction (61.17%, 87.03% level 96.50%, 41.85% monocropped 2019). NaOH-Pi NaOH-Po (except for 2019) showed no difference between systems. significantly accumulated concentrations HCl-P, while depleting Residual-P, 2020. In conclusion, vetch/rape polyculture stimulated soil mobilization advantage over cropping.