Abstract
The accumulation of phosphorus in different utilization age (0, 1, 2, 3, 5, 13-year) vegetable greenhouses soil with multi-point mixed samples was examined in Damintun Town of Shenyang. The results showed that the content of P of all samples was increased with the utilization ages of the vegetable greenhouses. For all the samples, the concentration of TP and Olsen-P in the 0-40cm layer was higher than that in the 40-120cm. Compared with other samples, the content of TP and Olsen-P of 13 years of vegetable greenhouse soil is the highest throughout the 0-120cm. In the 0-20cm layer, the TP concentrations in 13-year vegetable greenhouse soil is 4 times higher than that in the open vegetable land, and the concentration of Olsen-P range from 23.87mg kg-1 in bare land soil to 102.13mg kg-1 in 13-year vegetable greenhouse soil. These results demonstrated that long-term continuous P input from chemical fertilizers and manure can cause P accumulation in soils and enrich in topsoil.
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