Crop production in China has been greatly improved by increasing phosphorus (P) fertilizer input, but overuse of P by farmers has caused low use efficiency, increasing environmental risk and accumulation of P in soil. From 1980 to 2007, average 242 kg P ha-1 accumulated in soil, resulting in average soil Olsen P increasing from 7.4 to 24.7 mg kg-1. China is facing huge challenges to improve P use efficiency through optimizing corresponding technology and policies. The problem is exacerbated because people have been shifting their diet from plant-based to animal-enriched foods. This results in higher P load in the food chain and lower P use efficiency. A multidisciplinary approach has been used to improve P management at the field and national level in China. Management strategies based on the soil and on the plant rhizosphere have been developed to increase efficient use of P. A national soil testing and fertilizer recommendation program has been used since 2005 to control build-up and maintenance of P levels. Interactions between root growth and the rhizosphere have been manipulated in intercropping systems and plant genetic traits have been exploited. Phosphorus surplus is highly associated with animal concentrated feed. The P-saving potential by the integrated P management strategies of P flow reaches 1.46 Mt P in 2050 compared to 2005.
- affinity phosphate transporter
Li, H., Huang, G., Meng, Q., Ma, L., Yuan, L., Wang, F., ... Zhang, F. (2011). Integrated soil and plant phosphorus management for crop and environment in China. Plant and Soil, 349(1-2), 157-167. https://doi.org/10.1007/s11104-011-0909-5