Uustitalo, Risto; Ylivainio, Kari; Turtola, Eila and Kangas, Arjo (2007) Accumulation and translocation of sparingly soluble manure phosphorus in different types of soils after long-term excessive inputs. Agricultural and Food Science, 16 (4), pp. 317-331.
- Published Version
When phosphorus (P) is applied to soils in excess of plant P demand, P accumulation takes place. By means of P fractionation, we studied the fate of P in 35 soils that had received long-term surplus P rates as fox and mink manure P (F&MM-P), considered as a sparingly soluble P source. We compared these data with those from the same soils under a more typical P management, i.e., fields amended with soluble P sources superphosphate and dairy manure (SP+DM). Fractionation of manures according to the Hedley procedure suggested limited solubility of F&MM-P, two-thirds of the F&MM-P being soluble in acid (HCl) only. In mineral soils, surplus F&MM-P accumulated for the most part as HCl-P (poorly available), whereas in organic soils accumulation occurred largely as NaOH-soluble (moderately available) and labile P. Translocation of F&MM-P was evidenced by P fractionation and by agronomic P test: subsurface soil of F&MM-amended fields contained more P than the same soils in fields amended with SP+DM. In the 35 soils that had received surplus F&MM-P, agronomic P status was classified as “excessive” in 90% of the samples taken from the plough layer, in 75% of those from 20–40 cm depth, and in 50% of those from 40–60 cm depth. In the reference soils amended with SP+DM, “excessive” P status was recorded for 23% of the plough layer samples and 4% of the subsurface samples. These results show that manure P which appears as sparingly soluble in P fractionation may in a longer term increase the content of labile soil P and translocate in the soil profile when applied in high rates.
|EPrint Type:||Journal paper|
|Keywords:||phosphorus saturation, translocation in soils, manure, fur animals, long-term effects, Finnish Agri-Environmental Program|
|Subjects:||Soil > Nutrient turnover|
|Research affiliation:||Finland > MTT Agrifood Research|
|Deposited By:||Koistinen, Riitta|
|Deposited On:||06 May 2010 10:29|
|Last Modified:||06 May 2010 10:29|
|Refereed:||Peer-reviewed and accepted|
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