Application of aluminium toxicity indices to soils under various forest species

Álvarez‐Rodríguez, Esperanza; Fernández-Marcos, María Luisa; Monterroso, C.; Fernández‐Sanjurjo, María J.

doi:10.1016/j.foreco.2005.02.044

Cited by 122 publications

(46 citation statements)

References 48 publications

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“…The change of pH was a complicated process affected by many factors, and three reasons should explain why it decreased with the increase of mulching years. Firstly, chemical nitrogen fertilizer, which was applied before mulching, may accelerate the accumulation of N, resulting in nitrification and much more H + [9,32]. Secondly, the degradation of residual mulching materials and the cultivation of anaerobic bacteria may lead to the accumulation of phenolic acids and then result in soil acidification [33].…”

Section: Mulching Management and Soil Phmentioning

confidence: 99%

Analysis of Soil Degradation Causes in Phyllostachys edulis Forests with Different Mulching Years

Zhao

Wang

et al. 2018

Forests

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Moso bamboo (Phyllostachys edulis (Carrière) J.Houz.) is famous for its fast growth and biomass accumulation, as well as high annual output for timber and bamboo shoots. Organic mulches are widely used to improve shoots' production in moso bamboo forests. However, continuous mulching management may cause bamboo forest degradation and affect sustainable development. The objective of this study was to identify the degradation mechanism and to provide a theoretical basis for recovery. A complete randomized block design with four treatments was conducted, including mulching for one year (M1), two years (M2), three years (M3) and no-mulching management (NM). Soil nutrient contents, enzyme activities and microbial biomass were determined. With the increase of mulching years, the soil pH value gradually reduced, causing soil acidification, but the content of soil organic matter was inclined to ascend. Soil total nitrogen (TN), total phosphorus (TP) and total potassium (TK) contents showed an increasing trend, and they were significantly higher in mulching stands than those in NM (p < 0.05). Contents of soil available nutrients (AN, AP and AK) increased, then decreased with the increase of mulching years and peaked in M1. With the increase of mulching years, the soil stoichiometry ratio (C/N, C/P and N/P) gradually increased. Soil invertase, urease and acid phosphatase activities presented a single-peak curve and reached the maximum within one year after mulching. Total microbial biomass and that of individual groups changed greatly after mulching. Soil microbial biomass increased first and then decreased, and it was the largest in M1. The fungi:bacteria ratio decreased in the first year and then began to rise, while the aerobic:anaerobic ratio showed the opposite trend. According to the overall results, M3 leads to soil acidification, imbalance of the nutrients' proportion, abnormal enzyme activity and change of soil microbial flora, and rotated mulching management (mulching one year and then recuperating one year) should be recommended in practice.

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Section: Mulching Management and Soil Phmentioning

confidence: 99%

Analysis of Soil Degradation Causes in Phyllostachys edulis Forests with Different Mulching Years

Zhao

Wang

et al. 2018

Forests

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“…In this study, the average concentration of Al 3+ was 3·87 µmol L −1 but varied widely depending on bedrock. The average value is lower than the value of 6·13 µmol L −1 found for soils developed over granodiorites, slates and limestones and under P. radiata stands in the same region (Álvarez et al ., ). Values as high as 19·3 µmol L −1 were reported for mixed maritime pine and Scots pine stands over slates (Fernández‐Sanjurjo et al ., ), which is higher than the 5·16 µmol L −1 found in this study for the same bedrock.…”

Section: Resultsmentioning

confidence: 97%

“…The total Al present in the soil solution ranged between 17·2 and 64·2 µmol L −1 and was significantly higher in the plot over mica schist than in the soils developed over granite and biotitic schist (Table ). Similar concentrations of total Al have been reported in other forest soils in Galicia with presence of pines: 40·7–115·9 µmol L −1 for pure Pinus sylvestris and mixed P. pinaster and P. sylvestris , respectively (Fernández‐Sanjurjo et al ., ), and 33 µmol L −1 (Arbestain et al ., ) and 41·9 µmol L −1 (Álvarez et al ., ) for Pinus radiata . Nonetheless, the values obtained in the present study are high.…”

Section: Resultsmentioning

confidence: 99%

Aluminium Toxicity Risk for Pinus pinaster in Acid Soils (Galicia, NW Spain)

et al. 2016

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The influence of bedrock on aluminium toxicity and aluminium speciation in the soil solution was studied in four Pinus pinaster plots. Growth and biomass parameters in the acidic soils were also evaluated in relation to different Al toxicity indices. The plots were developed over slate, biotitic schist, mica schist and granite. Samples of rhizospheric and non-rhizospheric soil, 1-year-old needles and roots were collected in each study plot. Total Al, reactive Al, acid-soluble Al, non-labile and labile Al and Al species (Al 3+ , Al-OH, Al-F and Al-SO 4 ) were determined in soil solution. Reactive Al dominated over the acid-soluble Al, and the non-labile Al predominated over the labile Al in all soils, but particularly over mica schist. In the biotitic schist soil, the Al forms and total Al were lower, whereas concentrations were always higher over mica schist. The Al forms considered most toxic were Al 3+ and Al-OH, and Al concentrations were highest over slate and mica schist. Al toxicity indices in soil, needle and roots showed a risk of toxicity in mica schist, slate and granite. The stand site indices over slate and mica schist were lower, consistent with the high labile Al and Al 3+ + Al-OH in soil solution. Despite the high stand site index over granite, the growth efficiency was low, in accordance with very low ratios of Ca/Al in needles or fine roots. This confirmed the adaptation of maritime pine to granitic substrates.

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“…It is believed that almost 40 % of the world's acid soils is due to the effects of aluminum toxicity, which is the key factor hampering plant (i.e., crop) performance on the acid soils. [2] In addition, aluminum is also deemed to be the primary toxicant killing fish in acidified waters. [3] Therefore, the development of fluorescent sensors for aluminum is critical in environmental monitoring.…”

Section: Introductionmentioning

confidence: 99%

“…After reaction for 8 h, the solvent was removed under reduced pressure, and the residue was then purified by chromatography on silica gel (CH 2 (2:3) at room temperature to afford the sensor stock solution (50 µ). Test solutions were prepared by placing 2 mL of the sensor stock solution and an appropriate aliquot of each metal stock into a 5-mL volumetric flask and diluting the solution to 5 mL with methanol/CH 2 Cl 2 (2:3).…”

mentioning

confidence: 99%