Effect of soil acidification induced by a tea plantation on chemical and mineralogical properties of Alfisols in eastern China

Abstract

The effect of a tea plantation on soil basic properties, chemical and mineralogical compositions, and magnetic properties of Alfisols from eastern China was studied. Under the tea plantation, acidification took place within a soil depth of 70 cm, with the maximum difference in pH in the upper 17 cm (ΔpH = 2.80). Both the tea plantation and unused soil profiles were predominated by free Fe and Al oxides, i.e. citrate/bicarbonate/dithionite extractable Fe (Fe(d)) and Al (Al(d)). Tea plantation soil was characterized by higher Al(d) and Fe(d) and lower Fe oxalate, Fe(2)O(3) and Al(2)O(3); CaO was depleted, whereas SiO(2) accumulated. Acidification induced by the tea plantation led to destruction of vermiculite followed by dissolution of the hydroxy-Al interlayers within its structure. The data clearly demonstrated that significant soil weathering occurred with acidification caused by tea cultivation. This acidification also resulted in decreased content of ferrimagnetic minerals due to the dissolution of minerals and movement of Fe in the profile.

Proton release from tea plant (Camellia sinensis L.) roots induced by Al(III) under hydroponic conditions

“…Tea plants can take up large quantities of Al(III) from soils during growth (Ruan et al 2006), and the Al(III) is accumulated mainly in the mature leaves of tea plants (Matsumoto et al 1976;Owuor and Cheruiyot 1989). Cultivation of tea plants has accelerated acidification of soils in tea plantations (Wang et al 2010;Alekseeva et al 2011). However, the mechanisms for soil acidification induced by tea plants are not well understood.…”

Prospecting for Prehistoric Gardens: Results of a Pilot Study

“…Soil temperatures achieved experimentally range from < 100°C to > 300°C (Heyward, ; Beadle, ; Ahlgren and Ahlgren, ; Weston, ; Certini, ). Magnetic susceptibility is a measure of ‘the total contribution of Fe‐bearing minerals…usually controlled by the total ferrimagnetic concentration (Thompson and Oldfield 1986)’ (Alekseeva et al ., , p. 143; see also Dearing, , p. 36).…”

“…The effects of agriculture on soils are varied, but well studied (e.g. Eidt, ; Sandor et al ., ; Ball and Kelsay, ; Coultas et al ., ; Kauffman et al ., ; Miller and Gleason, ; Lawrence et al ., ; Leonardi et al ., ; Morisada et al ., ; Ohta et al ., ; Beach et al ., ; Sombroek et al ., ; Branch et al ., ; Wilson et al ., ; Alekseeva et al ., ; Costa et al ., ). Even slight alterations of soil properties are remarkably persistent (e.g.…”

El potencial del magnetismo en la clasificación de suelos: una revisión

“…medida de la cantidad total de Fe libre que se hidroliza en ditionito, mientras que la diferencia Fed -Feo es usada para estimar el hierro en la goethita y la hematita (AcevedoSandoval et al, 2002(AcevedoSandoval et al, , 2004. A pesar de la gran importancia de los óxidos de hierro edáfico, existen escasos reportes sobre las propiedades magnéticas de los suelos asociadas a los horizontes y por ende a la pedogénesis, algunos de ellos, por grupo de suelo son: Gleysol (Maher, 1986) (Figura 3); Histosol (Feng, 2001), Leptosol (Hanesch et al, 2007;Hannama y Dearing, 2008);Cambisol (Soubrand-Colin et al, 2009), Andosol (Soubrand-Colin et al, 2009, Ferralsol, Acrisol y Luvisol (Alekseeva et al, 2010); Antrosol (Morton et al, 2009;Aguilar et al, 2011) (Tabla 4). Por esta razón es posible deducir que en la caracterización de suelos, algunas técnicas magnéticas podrían utilizarse para identificar horizontes, propiedades y materiales de diagnóstico y mejorar las definiciones de grupos de suelo y sus calificadores primarios y secundarios.…”