Soil Organic Matter Effects on Phosphorus Sorption: A Path Analysis

Kang, Jin-Ku; Hesterberg, Dean; Osmond, Deanna L.

doi:10.2136/sssaj2008.0113

Cited by 140 publications

(93 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The soil properties that had the greatest influence on the b parameters were soil texture, pH, Ca, Al, and Fe. Soil OM was not a significant factor for the b parameter, which contradicts the results of Kang et al (2009) and Weng et al (2012), who reported that high OM levels would minimize a soil's ability to adsorb P from a solution.…”

Section: Chemical Sequential Fractionationcontrasting

confidence: 85%

“…Other researchers have also reported that P sorption in soils is dependent on pH, Ca, the initial P status of the soils, and OM (Weng et al, 2012;Perassi and Borgnino 2014). However, Kang et al (2009) andWeng et al (2012) reported that dissolved OM in soil can reduce the sorption potential of a soil because of its interaction with Al and Fe, which would otherwise sorb P from solution and organic compounds can out-compete phosphate groups for biding sites. In our study, soil OM also had a negative impact on the k i and k f parameters (Table 1 and Table 2).…”

Section: Chemical Sequential Fractionationmentioning

confidence: 99%

See 1 more Smart Citation

Chemical Distribution of Phosphorus in Soils used during the Development of Sorption Isotherms

Schmitt

Pagliari

Nascimento

2017

Soil Science Soc of Amer J

View full text Add to dashboard Cite

This study was developed to provide initial information on the chemical distribution of P into the different soil P pools after a soil sample underwent P sorption using 17 soil samples from the united States (13) and Brazil (4). During the sorption phase, soil samples were equilibrated with solutions containing increasing P concentrations (0-75 mg P l -1 ) following standard procedures. Following the sorption phase, the soil samples were allowed to air dry for 72 h and underwent a chemical fractionation (in water, anionic resin, 0.5M NahCo 3 , 0.1M Naoh, and 1.0M hCl). A wide range of sorption strength ranging from 0.043 to 0.289 l kg -1 and a maximum sorption ranging from 189 to 789 mg kg -1 were observed. More than 59% of the sorbed P was found in the water + resin fraction, which is considered the most labile pools where the binding energy is assumed to be low. In contrast, less than 25% of the sorbed P was found in the nonlabile pools where the binding energy is assumed to be the greatest. Although less than 25% of the sorbed P was found in the non-labile pools, the Naoh+hCl fraction contributed 2 to 61% of the overall sorption strength estimated for the soils studied. The results of this study suggest that sorption strength calculated from sorption studies are heavily skewed toward the nonlabile fraction, which was found to constitute a very small portion of the binding sites occupied during sorption studies.Abbreviations: b, the sorption maximum; ICP-OES, inductively coupled plasma optical emission spectroscopy; b f , sorption maximum determined using the sequential fractionation data; b i , sorption maximum estimated using the method of Nair et al. (1984); k, a coefficient unique to each soil that has been used as a measure of the sorption strength between soil particles and P; k f , the sorption strength parameter determined using the sequential fractionation data; k i , the sorption strength parameter estimated using the method of Nair et al. (1984); OM, organic matter; P i , inorganic P; P o , organic P; W kft , cumulative weighted sorption strength. W hen P is added to soils in the form of fertilizer, a series of reactions takes place, ranging from diffusion of P from the fertilizer granules into the soil solution, sorption of P into soil particles, and, with time, P precipitation (Hedley and McLaughlin, 2005). In the soil, inorganic P (P i ) will adsorb or precipitate by chemically binding with Al, Fe, or Ca (Lombi et al., 2006;Khatiwada et al., 2012;Eriksson et al., 2015). The solubility of phosphorus in soil is controlled by several factors, including how much P is originally adsorbed in the soil, how much P is precipitated in the soil, the soil pH, clay mineralogy, organic matter content, what types of minerals were formed during P precipitation, and the concentration of Ca, Al, Fe, and other cations in solution (Delgado and Torrent 2000;Violante and Pigna, 2002;Shigaki and Sharpley 2011;Weng et al., 2012;Eriksson et al., 2015;Gérard, 2016). McLaughlin et al. (2011) has shown that the amount of Ca...

show abstract

Section: Chemical Sequential Fractionationcontrasting

confidence: 85%

Section: Chemical Sequential Fractionationmentioning

confidence: 99%

Chemical Distribution of Phosphorus in Soils used during the Development of Sorption Isotherms

Schmitt

Pagliari

Nascimento

2017

Soil Science Soc of Amer J

View full text Add to dashboard Cite

show abstract

“…These relationships may be partly because that labile P is largely derived from the decomposition of organic matter (Tiessen et al 1994;Johnson et al 2003). Soil organic matter can also absorb labile Pi via poorly crystalline or non-crystalline Al and Fe (Kang et al 2009), as supported by the strong correlation between soil organic C content and P sorption index in our study (Fig. 3).…”

Section: Relationship Between Soil Organic C Content and Soil P Fractsupporting

confidence: 73%

“…Soil organic matter provides an important source of P that can be utilised by plants and soil microbes following mineralisation (Tiessen et al 1994;Kirkby et al 2011), as well as energy reserves and carbon (C) substrates used in microbial activities such as the production of enzymes involved in P mineralisation (Allison and Vitousek 2005;Allison et al 2007). It can also maintain soil P availability by providing binding sites (Kang et al 2009). However, some studies have suggested that an accumulation of soil organic C (or organic matter) may decrease soil P availability due to the inclusion of P in organic form (Huang et al 2012;Schlesinger et al 1998).…”

Section: Introductionmentioning

confidence: 99%

Relationships of phosphorus fractions to organic carbon content in surface soils in mature subtropical forests, Dinghushan, China

2014

View full text Add to dashboard Cite

Abstract. Exploring the relationship between the accumulation of soil organic carbon (C) and the form and availability of soil phosphorus (P) is important for improved understanding of soil P availability and its regulation of C storage in forest ecosystems. Here, we investigated the relationships among soil organic C, sequentially extracted P fractions and P sorption index in 32 surface soils (0-0.15 m depth) across eight mature subtropical forests (80-400 years) in Dinghushan, China. Results showed that soil organic P (Po) accounted for 40-63% (mean 54%) of soil total P. Soil organic C was significantly positively correlated with both the content and the percentage of soluble inorganic P (Pi), Al-Po and Fe-Po fractions and the content of the Al-Pi fraction. The content of soil total Po increased significantly with soil organic C, whereas the percentage of soil total Po tended to increase with soil organic C only when soil organic C was low (<30 Mg/ha) but was relatively stable when soil organic C was high (!30 Mg/ha). Moreover, soil organic C was highly correlated with P sorption index. Our results suggest that accumulation of organic C may increase, rather than decrease, the availability of P in surface soil in mature subtropical forests.

show abstract

“…However, the correlation coefficient is not large but the spatial distribution pattern of phosphorus ( Figure 5) indicates that the phosphorus is relatively more deficient in high clay area. Several studies have shown significant effect of soil clay content on phosphorus sorption [3][4][5]. High surface area and presence of various P sorbing minerals that results in the common observation that high clay soils often adsorb more P compared with coarse-textured soils.…”

Section: Citationmentioning

confidence: 99%