Effect of different phosphogypsum addition levels and mycorrhizal inoculation on growth and phosphorus, sulfur and arsenic uptake by maize plants (Zea mays L)
不同磷石膏添加量与接种菌根对玉米生长及磷、砷、硫吸收的影响

The growth and phosphorus (P), sulphur (S), arsenic (As) uptake of maize plants (Zea mays L) were studied. The maize plants grew in pots of soil and were undertaken different addition levels of phosphogypsum (PG) (0, 20, 40 g·kg-1) and three different kinds of arbuscular mycorrhizal (AM) fungi-Glomus mosseae (GM), Glomus aggregatum (GA), Diversispora spurcum (DS). Results showed that the soil-available P and S concentrations and plant biomass increased with the PG addition level. Whether inoculation or not, the PG40-treated strain constantly kept the highest P concentration and P uptake under different PG addition levels. Results also revealed that the shoot growth of PG40 treated maize strain was significantly enhanced when inoculated with DS, but was significantly inhibited when inoculated with GA. Under the same PG addition levels, comparing with control treatment without inoculation, the root P and S concentration and P uptake of maize strain inoculated with DS significantly increased while the root As concentration significantly decreased The root P concentration and uptake, as well as As concentration significantly decreased when maize was inoculated with GM. However, GA inoculation only significantly decreased root P concentration. In all treatments, the treatment of PG40 addition with DS inoculation had the most desirable effect on maize plants grown in the soil of low S and deficient P.