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000902945 1001_ $$00000-0002-7893-9451$$aLi, Fayong$$b0
000902945 245__ $$aOrganic Carbon Linkage with Soil Colloidal Phosphorus at Regional and Field Scales: Insights from Size Fractionation of Fine Particles
000902945 260__ $$aColumbus, Ohio$$bAmerican Chemical Society$$c2021
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000902945 520__ $$aNano and colloidal particles (1–1000 nm) play important roles in phosphorus (P) migration and loss from agricultural soils; however, little is known about their relative distribution in arable crop soils under varying agricultural geolandscapes at the regional scale. Surface soils (0–20 cm depth) were collected from 15 agricultural fields, including two sites with different carbon input strategies, in Zhejiang Province, China, and water-dispersible nanocolloids (0.6–25 nm), fine colloids (25–160 nm), and medium colloids (160–500 nm) were separated and analyzed using the asymmetrical flow field flow fractionation technique. Three levels of fine-colloidal P content (3583–6142, 859–2612, and 514–653 μg kg–1) were identified at the regional scale. The nanocolloidal fraction correlated with organic carbon (Corg) and calcium (Ca), and the fine colloidal fraction with Corg, silicon (Si), aluminum (Al), and iron (Fe). Significant linear relationships existed between colloidal P and Corg, Si, Al, Fe, and Ca and for nanocolloidal P with Ca. The organic carbon controlled colloidal P saturation, which in turn affected the P carrier ability of colloids. Field-scale organic carbon inputs did not change the overall morphological trends in size fractions of water-dispersible colloids. However, they significantly affected the peak concentration in each of the nano-, fine-, and medium-colloidal P fractions. Application of chemical fertilizer with carbon-based solid manure and/or modified biochar reduced the soil nano-, fine-, and medium-colloidal P content by 30–40%; however,the application of chemical fertilizer with biogas slurry boosted colloidal P formation. This study provides a deep and novel understanding of the forms and composition of colloidal P in agricultural soils and highlights their spatial regulation by soil characteristics and carbon inputs.
000902945 536__ $$0G:(DE-HGF)POF4-2173$$a2173 - Agro-biogeosystems: controls, feedbacks and impact (POF4-217)$$cPOF4-217$$fPOF IV$$x0
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000902945 7001_ $$0P:(DE-Juel1)171362$$aZhang, Qian$$b1
000902945 7001_ $$0P:(DE-Juel1)129484$$aKlumpp, Erwin$$b2
000902945 7001_ $$0P:(DE-Juel1)145865$$aBol, Roland$$b3
000902945 7001_ $$0P:(DE-Juel1)157638$$aNischwitz, Volker$$b4
000902945 7001_ $$0P:(DE-Juel1)179519$$aGe, Zhuang$$b5
000902945 7001_ $$0P:(DE-HGF)0$$aLiang, Xinqiang$$b6$$eCorresponding author
000902945 773__ $$0PERI:(DE-600)1465132-4$$a10.1021/acs.est.0c07709$$gVol. 55, no. 9, p. 5815 - 5825$$n9$$p5815 - 5825$$tEnvironmental science & technology$$v55$$x0013-936X$$y2021
000902945 8564_ $$uhttps://juser.fz-juelich.de/record/902945/files/Lietal2021MES%26T.pdf$$yPublished on 2021-04-15. Available in OpenAccess from 2022-04-15.
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