Nano and micro manure amendments decrease degree of phosphorus saturation and colloidal phosphorus release from agriculture soils

Khan, Shafiullah; Liu, Chunlong; Milham, Paul J.; Eltohamy, Kamel Mohamed; Hamid, Yasir; Jin, Junwei; He, Minfei

doi:10.1016/j.scitotenv.2022.157278

Cited by 11 publications

(3 citation statements)

References 41 publications

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“…The application of P can increase soil surface and underground P concentration [2]. The high P saturation in soil triggered the soil colloid's dispersion due to high P concentration, which released more CP [21,22]. In this study, all P forms increased with increasing P fertilizer rates.…”

Section: Whether Phosphorus Leaching Loss After Fertilization Is a Ri...mentioning

confidence: 55%

Effects of Phosphorus Fertilizer Application Rates on Colloidal Phosphorus Leaching in Purple Soil in Southwest China

Zheng

et al. 2022

Water

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Phosphorus (P) lost via leaching from agricultural land is of major concern for water resource managers worldwide, and colloidal phosphorus (CP) may have a high contribution, since it is an important mobile form of P in soil and subsurface drainage. The objective of this study is to relate P fertilization application rates to CP leaching. To eliminate the influence of climate and facilitate the accurate measurement of P contents in different soil layers, we established soil columns to investigate the impacts of fertilizer application rates and timing on P leaching. Therefore, a soil column leaching experiment was undertaken with different P fertilization application rates (0, 20, 40, 100, 200, and 400 mg kg−1) for purple soil in southwest China. P application rates had significant effects on CP and dissolved phosphorus concentrations in the top soils (p < 0.05) (e.g., 0–10 cm in this study), and they further increased P leaching loss by 24–375%. CP was the dominant P form and contributed 31–61% to total phosphorus in the leachate. The concentration of different P forms in leachates decreased significantly over time, and the risk of P leaching loss was greater within two weeks after P application (p < 0.05). The advisable range of P application rate is recommended to be 0–450 kg ha−1 for agricultural practice, and it is also recommended to keep P fertilizer in the soil for more than two weeks. Some countermeasures, related to application rates and timing, should be taken to minimize the buildup of P in the field and reduce the risk of P leaching.

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Section: Whether Phosphorus Leaching Loss After Fertilization Is a Ri...mentioning

confidence: 55%

Effects of Phosphorus Fertilizer Application Rates on Colloidal Phosphorus Leaching in Purple Soil in Southwest China

Zheng

et al. 2022

Water

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“…The P coll is recognized as a particularly mobile form of P, , contributing significantly to P loss from agricultural systems , and eutrophication of freshwater bodies. , It constitutes a substantial portion of total P in agricultural systems (13%–95%) , and streams (up to 30%). , Soil P coll mobility is influenced by various physical, chemical, and biological factors, , with pH, organic carbon (OC), and elements such as Fe, aluminum (Al), Mn, and calcium (Ca) being significant. , Despite its known importance, P coll behavior under reducing (anoxic) conditions is under-researched. A prior study on grassland soils revealed the anoxia-induced release of colloid- and nanoparticle-bound P < 450 nm, influenced by Fe .…”

Section: Introductionmentioning

confidence: 99%

“…24,25 It constitutes a substantial portion of total P in agricultural systems (13%−95%) 3,26 and streams (up to 30%). 18,27 Soil P coll mobility is influenced by various physical, chemical, and biological factors, 28,29 with pH, organic carbon (OC), and elements such as Fe, aluminum (Al), Mn, and calcium (Ca) being significant. 10,30 Despite its known importance, P coll behavior under reducing (anoxic) conditions is underresearched.…”

Section: ■ Introductionmentioning

confidence: 99%

Microbially Induced Soil Colloidal Phosphorus Mobilization Under Anoxic Conditions

Eltohamy,

Menezes-Blackburn,

Klumpp

et al. 2024

Environ. Sci. Technol.

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Understanding the behavior of colloidal phosphorus (P coll ) under anoxic conditions is pivotal for addressing soil phosphorus (P) mobilization and transport and its impact on nutrient cycling. Our study investigated P coll dynamics in acidic floodplain soil during a 30-day flooding event. The sudden oxic-toanoxic shift led to a significant rise in pore-water P coll levels, which exceeded soluble P levels by more than 2.7-fold. Colloidal fractions transitioned from dispersed forms (<220 nm) to colloid-associated microaggregates (>220 nm), as confirmed by electron microscopy. The observed increase in colloidal sizes was paralleled by their heightened ability to form aggregates. Compared to sterile control conditions, anoxia prompted the transformation of initially dispersed colloids into larger particles through microbial activity. Curiously, the 16S rRNA and ITS microbial diversity analysis indicated that fungi were more strongly associated with anoxia-induced colloidal release than bacteria. These microbially induced shifts in P coll lead to its higher mobility and transport, with direct implications for P release from soil into floodwaters.

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Biochar effects on soil aggregation, phosphorus distribution, and colloidal phosphorus content in paddy soils: a comparative study

Wei,

Qin,

Zeng

et al. 2024

J Soils Sediments

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Nano and micro manure amendments decrease degree of phosphorus saturation and colloidal phosphorus release from agriculture soils

Cited by 11 publications

References 41 publications

Effects of Phosphorus Fertilizer Application Rates on Colloidal Phosphorus Leaching in Purple Soil in Southwest China

Effects of Phosphorus Fertilizer Application Rates on Colloidal Phosphorus Leaching in Purple Soil in Southwest China

Microbially Induced Soil Colloidal Phosphorus Mobilization Under Anoxic Conditions

Biochar effects on soil aggregation, phosphorus distribution, and colloidal phosphorus content in paddy soils: a comparative study

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