Impact factors and mechanisms of dissolved reactive phosphorus (DRP) losses from agricultural fields: A review and synthesis study in the Lake Erie basin

Conservation practices modify soil phosphorus sorption properties and the composition of dissolved phosphorus losses during runoff

“…It is also true that the enrichment of TP in the topmost soil layers in NT and ST increases P agronomical availability (indicated by Olsen-P and Dyer-P) (Table 1), which have been observed in loamy soils (Sokolowski et al, 2020). Compared with soils under CT, soils under ST and NT treatment usually contained high crop residues, which upon degradation by soil organisms are expected to release significant proportions of P (Sokolowski et al, 2020;Ni et al, 2020;Daryanto et al, 2017), which will tend to stay on the soil surface due to lack of mixing imposed by the ST and NT management practices, thus leading to an accumulation of the released P into the topmost soil layers (Zhang et al, 2017).…”

“…Two mechanisms are commonly invoked to account for this increase: i) enhancing organic P mineralization from crop residues left at the soil surface leading to higher concentration of dissolved P in the topmost soil layers (Deubel et al, 2011); ii) general enrichment in P (and thus also in potentially soluble P) of the soil topmost layers due to the lack of downward transfer and mixing of the P brought to the soil for crop growth (Baker et al, 2017;Daryanto et al, 2017;Jarvie et al, 2017;Duncan et al, 2019). Two emblematic examples, the first one in Erie Lake Basin, the other in Chesapeake Bay basin, reveal an increase in dissolved P loss associated with areas of increased implementation of conservation tillage practices (Ulén et al, 2010;Dodd and Sharpley, 2016;Jarvie et al, 2017;Ni et al, 2020). These results demonstrate that the implementation of ST and NT practices could lead to a shift from particulate P to dissolved P diffusion in rural catchments, with a potentially highly negative impact on freshwater ecosystems, given that dissolved P is more bioavailable than particulate P (Duncan et al, 2019).…”

A high amylase‐producing bacterial strain exhibiting the phosphorus‐dissolving ability, isolated from freshwater aquaculture pond

“…The microbial approach is used to improve the nutritional level of soluble phosphorus in the water environment and decreased the waste of phosphate fertilizer resources (Ren et al., 2012). However, excessive DRP may result in harmful algae blooms since it is highly reactive and bioavailable for algae growth (Ni, Yuan, & Liu, 2020). Phosphorus‐dissolving experiments proved that the strain S458‐1 exhibited a significant advantage in degrading insoluble phosphorus in the rearing water.…”

Influence of Anthropogenic Loads on Surface Water Status: A Case Study in Lithuania

“…Phosphorus (P) loading in lakes degrades the quality and usability of water globally [17]. Dissolved reactive phosphorus losses from agricultural fields promote algal growth in water bodies and may increase the risk of harmful algal blooms [18]. High concentrations of bioavailable P have also been found in high-intensity agricultural systems [19].…”