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Title	Recycled nutrients supply phosphorus and improve ryegrass yields on phosphorus-depleted soil
ID_Doc	24745
Authors	Nicksy, J; Amiro, B; Entz, M
Title	Recycled nutrients supply phosphorus and improve ryegrass yields on phosphorus-depleted soil
Year	2021
Published	Canadian Journal Of Soil Science, 101, 3
Abstract	Recycling phosphorus (P) within the food system is fundamental to long-term sustainability. This greenhouse study compared three sources of recycled P - struvite precipitated from municipal wastewater, black soldier fly frass from food waste, and anaerobic digestate of food waste - to mono-ammonium phosphate (MAP), com- post, and a control. Italian ryegrass (Lolium multiflorum) was harvested four times during a 123 d trial from P-depleted soil. In nitrogen (N) sufficient conditions, all amendments significantly increased cumulative ryegrass yields compared with the control and were not significantly different from MAP. Relative P supply was frass = MAP > struvite >= compost >= digestate >> control. The recycled nutrient sources tested show promise as sustainable P sources.
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