Differences in the distribution, availability, and sorption-desorption isotherms of phosphorus fractions in soil aggregates from cut slopes with different restoration methods

Yang, Qingxiang; Ai, Xiaoyan; Sheng, Meihua; Ai, Shenghao; Wang, Yue; Ai, Yingwei

doi:10.1016/j.still.2023.105822

Cited by 7 publications

(4 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Aggregate‐associated P is the main form of soil erosion‐induced P loss (Wang et al, 2009), where the absorption and desorption process of aggregate‐associated P plays a crucial role (Yang et al, 2023). In this study, under the same incubation conditions, the silt clay loam soil and loam soil can adsorb more P (Figure 2) and also desorb a larger amount of P (Figure 4a).…”

Section: Discussionmentioning

confidence: 99%

“…Since the clay fraction can transport adsorbed nutrients or contaminants along the soil surface with runoff (Huang et al, 2021) or downward in the soil profile with infiltrating water (Calero et al, 2008), there is a link between the functions of soil aggregate and soil P loss. However, existing studies concerning aggregate‐associated P were conducted on a specific soil with a certain texture or a single aggregate size fraction (Wu et al, 2021; Yang et al, 2023). Due to the close relationship between aggregate composition and soil texture, it is necessary to systematically investigate the variations of aggregate‐associated P under different soil textures.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Soil texture as a regulatory pathway for the enrichment of aggregate‐associated phosphorus

Wang,

Wei,

Yang

et al. 2024

Land Degrad Dev

View full text Add to dashboard Cite

Soil phosphorus (P) loss induced by erosion is an imminent threat to global food security, and as the linkage between erosion and P loss, aggregate is the unit for soil P storage. This study investigated the impacts of soil texture on aggregate‐associated P and its enrichment rate by using soils with four typical textures (silty clay, clay loam, silty clay loam, and loam) from croplands with the same field management in Danjiangkou (Hubei, China), the water source for the Middle Route of South‐to‐North Water Diversion. The initial P concentration in the range of 36.5 to 411.2 mg kg−1 was generated by laboratory incubation, and aggregate‐associated P was determined by the combination of wet sieving and molybdenum blue colorimetric method. Aggregate‐associated P was shown to be mainly concentrated in <0.05 mm aggregates (23.20–315.52 mg kg−1), accounting for 30.71%–35.28% of P concentration for a unit mass of soil. In addition, aggregate‐associated P and its enrichment rate generally decreased with the decline of clay content (333.76–63.25 mg kg−1 in 1–0.5 mm size aggregate) under the same aggregate size fraction, while they all exhibited a unimodal distribution (increasing first and then decreasing) with decreasing aggregate size. Moreover, clay content made the most contribution to the increase of aggregate‐associated P (R2 > 0.56) and its enrichment rate (R2 = 64.4%, p < 0.01), while CaCO3 showed a contrary trend (R2 > 0.56, and R2 = 49.1%, p < 0.01). Collectively, variations of aggregate‐associated P and ERi were mainly attributed to soil clay fraction‐regulated P adsorption.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Soil texture as a regulatory pathway for the enrichment of aggregate‐associated phosphorus

Wang,

Wei,

Yang

et al. 2024

Land Degrad Dev

View full text Add to dashboard Cite

show abstract

“…Currently, research on phosphorus adsorption-desorption in black soil of northeast China primarily focuses on the impacts of various fertilization methods, different small molecular organic acids, and humic acids on surface soil phosphorus adsorption-desorption. However, there is a scarcity of studies investigating soil phosphorus adsorption-desorption at different depths [ 44 – 47 ]. Therefore, this study focuses on investigating the adsorption-desorption characteristics of P in the 0–100 cm soil profile within the black soil region of northeast China.…”

Section: Introductionmentioning

confidence: 99%

Study on vertical variation characteristics of soil phosphorus adsorption and desorption in black soil region of Northeast China

Zhao,

Xie,

et al. 2024

PLoS ONE

View full text Add to dashboard Cite

The adsorption and desorption of phosphorus (P) in soil constitute a crucial internal cycle that is closely associated with soil fertility, exerting direct influence on the quantity, form, and availability of P within the soil. The vertical spatial variation characteristics of soil adsorption and desorption were investigated for the 0–100 cm soil layer in the northeast black soil region in this study. The maximum adsorption capacity (Qmax) and maximum adsorption buffer capacity (MBC) of black soil in the study area ranged from 313.8 to 411.9 mg kg-1 and from 3.1 to 28.8 L kg-1, respectively, within the soil layer of 0–100 cm depth, exhibiting an increasing trend with greater soil depth. The degree of P adsorption saturation (DPS) exhibited a contrasting trend with the variations in Qmax and MBC, ranging from 3.8% to 21.6%. The maximum desorption capacity (Dmax) and desorption rate (Dr) of soil P ranged from 112.8 to 215.7 mg kg-1 and 32.1% to 52.5%, respectively, while the readily desorbable P (RDP) in soil was within the range of 1.02 to 3.35 mg kg-1. Both Dmax, Dr, and RDP exhibited a decreasing trend with increasing soil depth before showing an upward trend. These research findings not only provide essential background data for the systematic investigation of soil P in the black soil region but also serve as a valuable reference for assessing soil quality in this area.

show abstract

“…The Hedley sequential extraction procedure distinguishes inorganic phosphorus from organic phosphorus, thus estimating the availability of phosphorus in soil (Hedley et al, 1982;Tiessen & Moir, 2006). P forms derived by the modified Hedley method were classified by Yang, Shi, et al (2023) and Xu et al (2017) into the following fractions: (1) readily plant-available P (Resin-P, NaHCO 3 -P i and NaHCO 3 -P o ), (2) moderately available or Al-Fe-associated P (NaOH-P i and NaOH-P o ), (3) slowly available P (cHCl-P i , cHCl-P o and dHCl-P) and (4) residual-P, which is not removed easily or is difficult to absorb for plants (Residual-P) (Yang, Ai, et al, 2023).…”

Section: Introductionmentioning

confidence: 99%

Enhancing phosphorus bioavailability in lateritic red soil: Combining Bacillus subtilis inoculated microbial organic fertilizer with reduced chemical input

Duan,

Li,

et al. 2023

Soil Use and Management

View full text Add to dashboard Cite

Optimal phosphorus (P) levels in lateritic soils are key for sustainable crop production. However, the effect of various fertilizers on soil phosphorus pools, crop phosphorus uptake, and crop yields remains unclear. This study investigated the effect of different fertilization strategies on plant growth and soil P fractions, and determined the contribution of biotic and abiotic factors to insoluble P release. We found that resin‐P, NaHCO3‐P, and NaOH‐P represented the primary active P pools in the lateritic soil, contributing 59.8% of the total P in conventional fertilization (CF), with Fe/Al‐bound P (NaOH‐P) being 42.1% of the active P pool. Combining Nangbowang (NBW), a microbial organic fertilizer inoculated with Bacillus subtilis (≥ 2×107 million CFU g‐1), with reduced chemical fertilizer (NBW+CR) increased soil P availability and promoted the release of Fe/Al‐bound P and residual‐P, decreasing the Fe/Al‐bound P to 21.7%. Soil biological factors mainly influenced the P transformation process. With the consumption of soil active P, NBW bio‐organic fertilizer enhanced the niche filtration of P solubilizing bacterial communities (Gemmatimonadetes, Sphingomonas, and Halomonas), altered the soil functional microbial community structure, and promoted P form conversion. The NBW + CR treatment also enhanced nitrogen and P nutrient uptake by pepper plants (Capsicum annuum), with increased total P concentrations in pepper fruit and stem, and improved crop yield. NBW increased active P concentrations in the soil and promoted Fe/Al‐P release and transformation by impacting autochthonous microbes involved in the conversion of P chemical species. These results can guide the improvement of P availability and release in lateritic red soils using bio‐organic fertilizer.

show abstract

Differences in the distribution, availability, and sorption-desorption isotherms of phosphorus fractions in soil aggregates from cut slopes with different restoration methods

Cited by 7 publications

References 75 publications

Soil texture as a regulatory pathway for the enrichment of aggregate‐associated phosphorus

Soil texture as a regulatory pathway for the enrichment of aggregate‐associated phosphorus

Study on vertical variation characteristics of soil phosphorus adsorption and desorption in black soil region of Northeast China

Enhancing phosphorus bioavailability in lateritic red soil: Combining Bacillus subtilis inoculated microbial organic fertilizer with reduced chemical input

Contact Info

Product

Resources

About