How air-drying affects DGT P results in calcareous soils

• Autorzy: Zhang Y. , Wang Y. , Tan Y. , Li L. , Wang X.
• Języki publikacji: EN

Abstrakty

EN

Diffusive gradients in thin films (DGT) technology has been increasingly proved to be a promising tool for accurately predicting plant-available phosphorus (P) in soil using air-dried samples. However, the effects of the air-drying process on DGT-measured P are unknown compared to those of using moist samples in which plant roots survive throughout a growing season. We investigated the differences between the Olsen P and DGT P values in 58 air-dried and moist soil samples. The results showed that the discrepancy in the DGT P values between air-dried and moist samples increased with an increase in the organic P concentration in soils. It was presumed that the air-drying process converted some easily mineralized organic P into its inorganic form, thereby allowing it to be measured by the DGT method. The DGT P values in moist samples can be calculated from the values obtained in air-dried samples using the following equation: . However, the Olsen P values were highly correlated (R²= 0.95) when using air-dried and moist samples, although significant differences were observed. We concluded that the effects of air-drying on predicting soil available P using the Olsen P method can be neglected due to the high correlation relationship. The availability of easily mineralized organic P needs to be further explored.

• Wydawca: -
• Czasopismo: Polish Journal of Environmental Studies
• Rocznik: 2019
• Tom: 28
• Numer: 3
• Opis fizyczny: p.1507-1515,fig.,ref.

Twórcy

autor

Zhang Y.

• College of Resources and Environment, Northwest A and F University, Yangling, China

autor

Wang Y.

• College of Resources and Environment, Northwest A and F University, Yangling, China

autor

Tan Y.

• College of Resources and Environment, Northwest A and F University, Yangling, China

autor

Li L.

• College of Resources and Environment, Northwest A and F University, Yangling, China

autor

Wang X.

• College of Resources and Environment, Northwest A and F University, Yangling, China

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Identyfikatory

DOI

10.15244/pjoes/86216