Effect of plastic film mulching on dry mass accumulation and phosphorus uptake of corn receiving different fertilizers

In order to investigate the effects of plastic film mulching(PFM) on maize growth and phosphorus uptake,effects of PFM were studied on dry mass accumulation,phosphorus content,phosphorus uptake,phosphorus distribution,and phosphorus harvest index of corn receiving different fertilizers in field condition.The results were presented as follows: 1) PFM could significantly increase the dry mass of corn at different growth stage.The largest percentage of dry mass occurred at seedling and jointing stages of corn with the values of 24.9%-126.3%.At the seedling stage,dry mass of corn was more strongly increased by PFM,with the application of just phosphorus fertilizer than with the application of phosphorus and potassium,or nitrogen,and potassium fertilizers at the same time.2) PFM could also significantly increase the phosphorus content,phosphorus accumulation of above part of corn,and its effect is stronger at the early growth stage of corn than that at the late growth stage.At the presence of PFM,the content of phosphorus,and accumulation of phosphorus of corn are higher at the treatment of P than those at other treatments such as CK,PK,and NPK.The content of phosphorus and accumulation of phosphorus of corn were increased by 56.3% and 253.0%,respectively,at the treatment of phosphorus fertilizer and PFM.PFM has no significant effects on phosphorus transferring rate of corn.