AI Article Synopsis
- Reactive substrates can help reduce phosphorus pollution and can be recycled for agricultural use once saturated with phosphorus.
- A pot experiment showed that using three different reactive substrates (Filtra P, Polonite, and wollastonite) improved ryegrass yield and phosphorus uptake in acid soils compared to controls.
- Polonite was particularly effective, enhancing the yield and nutrient levels in ryegrass while also increasing soil pH and cation exchange capacity, indicating potential benefits for soil health.
Article Abstract
Reactive substrates used in filter systems can reduce phosphorus (P) pollution and, once saturated with P, may be recycled in agriculture. These substrates are usually calcium carbonate derivates with high pH values, which may be particularly beneficial for acid soils. Three reactive substrates (Filtra P, Polonite and wollastonite) saturated with P were used as amendments to an acid soil in a pot experiment. Substrate amendments tended to improve ryegrass yield and P uptake compared with control and potassium phosphate treatments. Polonite produced the highest yield/amendment ratio, while Polonite and Filtra P significantly increased the concentrations of P and Ca in the ryegrass. Addition of all three substrates increased the pH, AL-extractable P and cation exchange capacity of soils during the experiment. These substrates can therefore be applied to acid soils in order to recycle P and improve soil properties.
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| http://dx.doi.org/10.1016/j.biortech.2007.08.037 | DOI Listing |
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