Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1080/090164700310018083
Title (Primary) Comparison of ammonium lactate, sodium bicarbonate and double calcium lactate methods for extraction of phosphorus from wetland peat soils
Author Otabbong, E.; Leinweber, P.; Schlichting, A.; Meißner, R.; Shenker, M.; Litaor, I.; Sapek, A.; Robinson, S.; Niedermeier, A.; Hacin, H.; Otabbong, J.R.
Source Titel Acta Agriculturae Scandinavica Section B-Soil and Plant Science
Year 2004
Department BOPHY; BOFO
Volume 54
Issue 1
Page From 9
Page To 13
Language englisch
Keywords extraction efficiency; P distribution; soil profile
Abstract

Procedures for routine analysis of soil phosphorus (P) have been used for assessment of P status, distribution and P losses from cultivated mineral soils. No similar studies have been carried out on wetland peat soils. The objective was to compare extraction efficiency of ammonium lactate (P-AL), sodium bicarbonate (P-Olsen), and double calcium lactate (P-DCaL) and P distribution in the soil profile of wetland peat soils. For this purpose, 34 samples of the 0–30, 30–60 and 60–90 cm layers were collected from peat soils in Germany, Israel, Poland, Slovenia, Sweden and the United Kingdom and analysed for P. Mean soil pH (CaCl2, 0.01 M) was 5.84, 5.51 and 5.47 in the 0–30, 30–60 and 60–90 cm layers, respectively. The P-DCaL was consistently about half the magnitude of either P-AL or P-Olsen. The efficiency of P extraction increased in the order P-DCaL<P-AL≤P-Olsen, with corresponding means (mg kg−1) for all soils (34 samples) of 15.32, 33.49 and 34.27 in 0–30 cm; 8.87, 17.30 and 21.46 in 30–60 cm; and 5.69, 14.00 and 21.40 in 60–90 cm. The means decreased with depth. When examining soils for each country separately, P-Olsen was relatively evenly distributed in the German, UK and Slovenian soils. P-Olsen was linearly correlated (r=0.594, P=0.0002) with pH, whereas the three P tests (except P-Olsen vs P-DCaL) significantly correlated with each other (P=0.0178≤0.0001). The strongest correlation (r=0.617, P=0.0001) was recorded for P-AL vs P-DCaL) and the two methods were inter-convertible using a regression equation: P-AL=−22.593+5.353 pH+1.423 P-DCaL, R 2 =0.550.

Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=4409
Otabbong, E., Leinweber, P., Schlichting, A., Meißner, R., Shenker, M., Litaor, I., Sapek, A., Robinson, S., Niedermeier, A., Hacin, H., Otabbong, J.R. (2004):
Comparison of ammonium lactate, sodium bicarbonate and double calcium lactate methods for extraction of phosphorus from wetland peat soils
Acta Agric. Scand. Sect. B-Soil Plant Sci. 54 (1), 9 - 13 10.1080/090164700310018083