Impact of annual and single application of alkaline treated biosolids on soil extractable phosphorus and total phosphorus

Relation between various soil phosphorus extraction methods and sorption parameters in calcareous soils with different texture

“…This is higher than the value calculated for leaching of P by rainfall and irrigation, indicating the importance of soil erosion and surface runoff in P losses from cultivated lands of studied area. However, many factors such as soil type, rainfall intensity and seasonal distribution; types of tillage, soil coverage and irrigation practices, the quantity and method of application of agricultural chemical and meteorological information, affecting P leaching and runoff (Shu et al, 2016). Various management practices should be taken into account to reduce P losses from these soils.…”

“…These results agree with those of Pizzeghello et al (2011) who indicated that long term use of chemical and organic fertilizers saturated sorption capacities of the soils and thus increased the risk of P losses. It became a common practice to add municipal sewage sludge (MSS) (Smith, 1996;Islas-Espinoza et al, 2014), biosolids (Shu et al, 2016) and manure to soils in many countries around the world to supply P, nitrogen and other macro-and micro-nutrients. In many parts of Iran MSS (Raiesi et al, 2015;Rezapour et al, 2012;Jalali and Arfania, 2010) and manures (Jalali and Ostovarzadeh, 2009) is used to supply plants with P and other nutrients.…”

Producing sludge for agricultural applications

“…Their use also addresses EU policy on sustainability and reuse of resources. Numerous studies have documented their efficacy in increasing crop yields and their use in biofuel cropping systems, and in general, biosolids application to land have been found to have a statistically significant impact on crop yields (Latare et al 2014) and soil phosphorus (Shu et al 2016), while having negligible adverse ecological impacts (Adair et al 2014). A selection of recent studies that report impacts of biosolids application on crop growth, soil fertility, water holding capacity, and soil pH (a lowered pH upon biosolids application is known to enhance the uptake of most metals; Carvalho et al 2013) is shown in Table 14.5.…”

Soil Phosphorus Fractionation as Affected by Paper Mill Biosolids Applied to Soils of Contrasting Properties

“…The non-renewable status of extractable phosphorus (P) on Earth (Cordell et al, 2009) has resulted in an increasing interest of alternative sources such as the use of biosolids in agriculture (Shu et al, 2016). Biosolids are by-products of industrial or urban wastewater treatment which are commonly used as fertilizer and soil amendment to improve crop productivity (Su et al, 2007).…”

“…Conversely, biosolids with similar total P may vary widely in the amount of P measured in various extracts (O'Connor et al, 2004). Different methods, including water-extractable P, Olsen P, or Mehlich-3 P (Wang et al, 2004;Su et al, 2007;Shu et al, 2016), can be used to investigate the effect of biosolids on soil P availability. Ippolito et al (2007) reported that characterizing fractions into labile and non-labile pools could be a typical method to predict P availability in biosolids-amended soils.…”