Closing the phosphorus cycle: Current P balance and future prospects in Germany

Mayer, Natalie; Kaltschmitt, Martin

doi:10.1016/j.jclepro.2022.131272

Cited by 13 publications

(1 citation statement)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, excess P from animal fodder in the form of phytate, the salt form of phytic acid, is excreted by the animal, deployed to soils and then promotes P wash-out to surface waters. Thus, the risk of eutrophication particularly in standing water bodies by high amounts of excess P is strongly increased (Mayer & Kaltschmitt, 2022).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Phosphorus and Phytase Activity Distribution in Wheat, Rye, Barley and Oats and Their Impact on a Potential Phytate Separation

Mayer

Widderich

Scherzinger

et al. 2023

Food Bioprocess Technol

Self Cite

View full text Add to dashboard Cite

When facing today’s scarcity of mineral phosphorus (P) resources and the environmental issues following enhanced P losses especially from agriculture, new solutions need to be implemented. In this framework, the potential for a mechanical separation of a P rich grain fraction from wheat, rye, barley and oats is investigated in order to provide animal feed with reduced organic P content. Thus, P accumulation in manure and soils should be prevented. Also, the subsequent utilization of the separated organic P, which occurs in the form of inositol P, for a sustainable P management via activation of intrinsic enzymes is evaluated. It was shown that in grain layers at 7.0, 5.5, 6.4 and 2.5% cross section of wheat, rye, barley and oats, respectively, maximum inositol P occurs with 1.6, 0.8, 1.4 and 1.2 g/100 g. Phytase activity is also highest in the outer layers of the grains with maxima of 9300, 12,000, 8400 and 2400 U/kg, respectively. A removal of the specific layers where inositol P is accumulated could possibly achieve a 24, 31, 60 and 27% organic P reduction for wheat, rye, barley and oats with 7, 14, 25 or 7% grain elimination. A debranning, eliminating all the outer grain layers to a certain extent, in contrast, leads to significantly higher mass losses. Within the P enriched layer determined from inositol P distribution, phytase activity is calculated to be around 285, 831, 777 and 42 U/kg for wheat, rye, barley and oats, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%