The determination of total phosphorus improves the accuracy of the bicarbonate extraction as an availability index

The efficient use of phosphorus (P) in agriculture should rely on accurate soil P tests (SPT). Organic P contributes to P supply to plants; however, it is not usually taken into account in assessing P fertilizer requirements. We hypothesized that there would be an increased accuracy of bicarbonate e...

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Bibliographic Details
Published in:Soil use and management 2019-06, Vol.35 (2), p.346-354
Main Authors: Recena, Ramiro, Díaz‐de la Torre, Isabel, García‐López, Ana M., Delgado, Antonio
Format: Article
Language:English
Subjects:
Accuracy
Bicarbonates
Carbonates
Clay
Depletion
Fertilizers
Material requirements planning
Molybdate
organic P
Organic soils
Phosphorus
plant available P
Soil
soil P test
Soils
Uptake
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Summary:The efficient use of phosphorus (P) in agriculture should rely on accurate soil P tests (SPT). Organic P contributes to P supply to plants; however, it is not usually taken into account in assessing P fertilizer requirements. We hypothesized that there would be an increased accuracy of bicarbonate extraction as SPT in predicting P uptake by plants if total P (TP) in this soil extract is taken into account. We conducted a soil P depletion experiment with 36 soils involving four consecutive crops in pots. Molybdate‐reactive P (MRP) and total P were determined in extracts centrifuged at 19,000 g (Bic‐MRPC and Bic‐TPC) or not (Bic‐MRP and Bic‐TP). MRP in extracts explained
ISSN:0266-0032
1475-2743
DOI:10.1111/sum.12498