Chemical and physical properties of rhizosphere and bulk soils of three tea plants cultivated in Ultisols

Chen, Yue Ming; Wang, Ming Kuang; Zhuang, Shun Yao; Chiang, Po‐Neng

doi:10.1016/j.geoderma.2006.04.003

Cited by 59 publications

(36 citation statements)

References 23 publications

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“…formosana) than in bulk soil (67 and 46 mg oxalic acid per kg R and bulk soil, respectively; 22 and 14 mg succinic acid per kg soil) (Chen et al 2001). The same trend was reported for several non-coniferous plants such as dwarf bamboo (Yushania niitakeyamensis) (Chen et al 2001), tea plants (Camellia sinensis) (Chen et al 2006a) and Coast Banksia (Banksia integrifolia L.f.) (Grierson 1992).…”

Section: Discussion Lmwoas In Soil Extractssupporting

confidence: 77%

Root organic acid exudates and properties of rhizosphere soils of white spruce (Picea glauca) and subalpine fir (Abies lasiocarpa)

Tuason¹,

Arocena²

2009

Can. J. Soil. Sci.

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Tuason, M. M. S. and Arocena, J. M. 2009. Root organic acid exudates and properties of rhizosphere soils of white spruce (Picea glauca) and subalpine fir (Abies lasiocarpa). Can. J. Soil Sci. 89: 287Á300. Rhizosphere processes, such as the production and release of organic acids, contribute to differences in properties between rhizosphere (R) and nonrhizosphere (NR) soils. We compared the organic acid composition/concentrations in the R and NR soil extracts of Picea glauca and Abies lasiocarpa, and in the root exudates of the same tree species. We also evaluated the chemical properties and mineral composition of the soil samples. Higher concentrations of organic acids were observed in R than in NR soils with aliphatic acids predominating in both soil extracts and root exudates. Acetic, formic, and protocatechuic acids were the predominant aliphatic and aromatic organic acids in R and NR soil extracts. Several organic acids in R soil extracts were not detected in NR soil extracts, with the reverse being true as well. Malonic and oxalic acids were predominant in the root exudates of both plant species. The total organic acid concentration was higher in P. glauca than in A. lasiocarpa. Glutaric and isocitric acids were found only in A. lasiocarpa, while gluconic, succinic, and protocatechuic acids were exclusive to P. glauca. Acetic and formic acids were detected in all R soil extracts, but not in root exudates. Glutaric acid (in P. glauca) and gluconic/succinic acids (A. lasiocarpa) were undetectable in root exudates, but were present in the corresponding R soil extracts. Soil pH was lower in the R than NR soil of P. glauca. Cation exchange capacity, and exchangeable Ca 2' and K ' were higher in R than in NR soils except for the A. lasiocarpa LFH horizon. Chlorite, mica, kaolinite, and vermiculite were detected in all soil samples. Smectite was detected more frequently in R than NR soils. Our results suggest that high amounts of organic acids might have played a significant role in the transformation of mica and chlorite into smectite in R soils. e´changeables e´taient plus e´leve´es dans les sols R que dans les sols NR, sauf dans l'horizon LFH de A. lasiocarpa. Le chlorite, le mica, la kaolinite et la vermiculite ont e´te´observe´s dans tous les e´chantillons de sol. Les smectites sont plus fre´quentes dans les sols R que NR. Les re´sultats laissent croire que la forte concentration d'acides organiques pourrait jouer un roˆle important dans la transformation du mica et du chlorite en smectites dans les sols de la rhizosphe`re.

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Section: Discussion Lmwoas In Soil Extractssupporting

confidence: 77%

Root organic acid exudates and properties of rhizosphere soils of white spruce (Picea glauca) and subalpine fir (Abies lasiocarpa)

Tuason¹,

Arocena²

2009

Can. J. Soil. Sci.

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“…Tao et al (2003) found increases in pH, DOC and microbial activity in the rhizosphere of maize during cultivation. In contrast, Chen et al (2006) observed that the pH in rhizosphere soils of tea plants was lower than that in bulk soils, while SOM and CEC were higher than those of bulk soils under field conditions. In the present work, no significant differences were observed in pH, CEC and SOM on average between rhizosphere soils and bulk soils, although pH values in some cases were considerably higher or lower in rhizosphere soils compared to bulk soils (Fig.…”

Section: Bulk Soils Versus Rhizosphere Soilsmentioning

confidence: 70%

“…Metals can be easily released from soils in the presence of LMWOAs (Qin et al, 2004). Correlation analysis indicated that LMWOAs extractable metals had high correlations with the phytoavailability of Al and Fe (Chen et al, 2006). Since chemical reactions may take place during the air-drying of wet soils, it is recommended that moist soils be used when estimating metal phytoavailability (Wang et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

Is an adjusted rhizosphere-based method valid for field assessment of metal phytoavailability? Application to non-contaminated soils

Fang

Wen

Shan

et al. 2007

Environmental Pollution

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An adjusted-RHIZO method was the most promising approach for predicting metal phytoavailability to wheat under field conditions. AbstractPreviously recommended rhizosphere-based method (RHIZO) applied to moist rhizosphere soils was integrated with moist bulk soils, and termed adjusted-RHIZO method (A-RHIZO). The A-RHIZO and RHIZO methods were systematically compared with EDTA, DTPA, CaCl 2 and the first step of the Community Bureau of Reference (BCR1) methods for assessing metal phytoavailability under field conditions. Results suggested that moist bulk soils are equally suited or even better than rhizosphere soils to estimate metal phytoavailability. The A-RHIZO method was preferred to other methods for predicting the phytoavailability of Ni, Cu, Zn, Cd, Pb and Mn to wheat roots with correlation coefficients of 0.730 (P < 0.001), 0.854 (P < 0.001), 0.887 (P < 0.001), 0.739 (P < 0.001), 0.725 (P < 0.001) and 0.469 (P < 0.05), respectively. When including soil properties, other extraction methods were also able to predict phytoavailability reasonably well for some metals. Soil pH, organic matter and FeeMn oxide contents, and cation-exchange capacity mostly influenced the extraction and phytoavailability of metals.

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“…Al levels in both soils and plants generally increased with increasing planting years; this is supported by many similar studies in tea plantations (Flaten 2002;Carr et al 2003;Chen et al 2006). Since tea plants are an Al-accumulator shrub, Al can accumulate in the soil and plant of tea plantations as a result of Al biogeochemical cycling (Dong et al 2001;Flaten 2002).…”

Section: Discussionmentioning

confidence: 55%

“…The interplay between aluminum (Al) and nutrients in tea (Camellia sinensis L.) plantations is of scientific and social interest (Ruan et al 2006) since (1) tea plants are an Al-accumulating shrub (Dong et al 2001;Tolrà et al 2011) and commercially available tea contains large amounts of Al. A further 30-40% of Al could be absorbed into infusions and thus absorbed by tea drinkers (Flaten 2002); (2) a potential link between high Al contents in tissues and various neuro-degenerative disorders such as Alzheimer's disease has been reported (Nayak 2002); (3) soil pH and nutrients have been altered by atmospheric deposition with global environmental changes and fertilization due to productivity maintenance (Ruan et al 2000;Chen et al 2006;Wang et al 2010), this has affected the Al cycling in tea plantations (Fung and Wong 2002;Ruan et al 2004;Fung et al 2008;Duan et al 2012) and vice versa; for example, soil available Al promotes plants to absorb phosphate (Konishi et al 1985;Dong et al 2001;Debnath et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Aluminum and nutrient interplay across an age-chronosequence of tea plantations within a hilly red soil farm of subtropical China

Fang¹,

Chen²,

Hu³

et al. 2014

Soil Science and Plant Nutrition

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Chemical and physical properties of rhizosphere and bulk soils of three tea plants cultivated in Ultisols

Cited by 59 publications

References 23 publications

Root organic acid exudates and properties of rhizosphere soils of white spruce (Picea glauca) and subalpine fir (Abies lasiocarpa)

Root organic acid exudates and properties of rhizosphere soils of white spruce (Picea glauca) and subalpine fir (Abies lasiocarpa)

Is an adjusted rhizosphere-based method valid for field assessment of metal phytoavailability? Application to non-contaminated soils

Aluminum and nutrient interplay across an age-chronosequence of tea plantations within a hilly red soil farm of subtropical China

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