Impact of agricultural practices on plant-available silicon

Klotzbücher, Thimo; Klotzbücher, Anika; Kaiser, Klaus; Merbach, Ines; Mikutta, Robert

doi:10.1016/j.geoderma.2018.06.011

Cited by 30 publications

(15 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…6c), respectively. Our data corroborate the results of previous field studies (Miles et al 2014;Li et al 2018;Meunier et al 2018;Klotzbücher et al 2018;Haynes 2019), which highlight the positive relationship between pH and CaCl 2 extractable Si content after 5 or 16 h of extraction. Fourthly, the soil buffering capacity had alleviated the pH increase induced by amendments.…”

Section: Discussionsupporting

confidence: 92%

“…Furthermore, biochar has a liming effect (Glaser et al 2002) promoting phytolith dissolution the rate of which increases by 2 orders of magnitude from pH 4 to 8 (Fraysse et al 2009). The increase in Si bioavailability due to liming (Keeping et al 2017;Klotzbücher et al 2018;Haynes 2019) must depend, however, on pH increase and thus soil buffering capacity, hence on soil constituents and weathering stage. This is unknown, despite that these soil properties can control the ability of phytolithic biochar to increase Si bioavailability, and enhance Si biocycling.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effects of phytolithic rice-straw biochar, soil buffering capacity and pH on silicon bioavailability

Unzué-Belmonte

Cornélis

et al. 2019

Plant Soil

View full text Add to dashboard Cite

Aims Supplying phytolith-rich biochar in agrosystems increases soil pH, CEC and nutrient availability, adding to the impact of Si uptake on plant growth. Here we studied this specific impact as influenced by soil properties, and assessed the role of phytoliths to provide plant available Si. Methods We used a young Cambisol and a highly weathered, poorly buffered, desilicated Nitisol. The biochars were produced from rice plants respectively enriched (Si+) and depleted (Si-) in Si. They had identical pH and nutrient contents, but largely differed in Si content (51.3 g Si kg −1 in Si + vs 0.3 g Si kg −1 in Si-). We compared their effects to that of wollastonite (CaSiO 3) on the biomass and mineralomass of wheat plants in a soil:solution:plant device. The contents of soil bioavailable Si and biogenic Si were assessed through an original CaCl 2 kinetic extraction and the DeMaster Na 2 CO 3 alkaline dissolution, respectively. Results The DeMaster technique dissolved Si from phytolith as well as from wollastonite. The soil buffering capacity (cmol c kg −1) was 31 in the Cambisol and 0.2 in the Nitisol. An identical supply of phytolithic biochar increased pH from 4.5 to 4.8 in the Cambisol, and from 4.8 to 7.4 in NI. It further increased the content of bioavailable Si (from 55 to 97 mg kg −1 in the Cambisol, and 36 to 209 mg kg −1 in the Nitisol), as well as plant Si uptake, biomass and Si mineralomass. That increase was largest in the Nitisol. Conclusions The DeMaster technique did not specifically quantify the phytolith pool. This pool was the main source of plant available Si in both the Cambisol and Nitisol amended with phytolithic biochar. At identical phytolithic Si supply, however, soil pH and soil buffering capacity controlled the transfer of Si in the soil-plant system, which was largest in the poorly buffered Nitisol. The effect of phytolithic biochar on Si bioavailability was depending on soil constituents and properties, and thus on soil type.

show abstract

Section: Discussionsupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Effects of phytolithic rice-straw biochar, soil buffering capacity and pH on silicon bioavailability

Unzué-Belmonte

Cornélis

et al. 2019

Plant Soil

View full text Add to dashboard Cite

show abstract

“…Haynes (2019) reported that high soil pH increased adsorption of H 4 SiO 4 onto metal-oxide surfaces and the maximum adsorption was at pH 9 to 10, thus resulting in the decrease of Si mobility and availability in soils. That report also observed that increased soil pH causes enhancement of phytolith solubility and therefore leads to a short-term increase of bioavailable Si releasing into soil solutions (Klotzbücher et al, 2018a). However, there was a reduction in the biogenic Si pool in topsoil over the longer term due to the strong leaching ability of a sandy soil in arid and semi-arid grasslands.…”

Section: Response Of Plant Silicon and Carbon To Salinitymentioning

confidence: 79%

Silicon Effects on Biomass Carbon and Phytolith-Occluded Carbon in Grasslands Under High-Salinity Conditions

Liu

Song

et al. 2020

Front. Plant Sci.

View full text Add to dashboard Cite

Changes in climate and land use are causing grasslands to suffer increasingly from abiotic stresses, including soil salinization. Silicon (Si) amendment has been frequently proposed to improve plant resistance to multiple biotic and abiotic stresses and increase ecosystem productivity while controlling the biogeochemical carbon (C) cycle. However, the effects of Si on plant C distribution and accumulation in salt-suffering grasslands are still unclear. In this study, we investigated how salt ions affected major elemental composition in plants and whether Si enhanced biomass C accumulation in grassland species in situ. In samples from the margins of salt lakes, our results showed that the differing distance away from the shore resulted in distinctive phytocoenosis, including halophytes and moderately salt-tolerant grasses, which are closely related to changing soil properties. Different salinity (Na + /K + , ranging from 0.02 to 11.8) in plants caused negative effects on plant C content that decreased from 53.9 to 29.2% with the increase in salinity. Plant Si storage [0.02-2.29 g Si m −2 dry weight (dw)] and plant Si content (0.53 to 2.58%) were positively correlated with bioavailable Si in soils (ranging from 94.4 to 192 mg kg −1). Although C contents in plants and phytoliths were negatively correlated with plant Si content, biomass C accumulation (1.90-83.5 g C m −2 dw) increased due to the increase of Si storage in plants. Plant phytolith-occluded carbon (PhytOC) increased from 0.07 to 0.28 of dry mass with the increase of Si content in moderately salt-tolerant grasses. This study demonstrates the potential of Si in mediating plant salinity and C assimilation, providing a reference for potential manipulation of long-term C sequestration via PhytOC production and biomass C accumulation in Si-accumulator dominated grasslands.

show abstract

“…High soil organic matter content promotes high soil water capacity, which positively affects water availability for plants, increases transpiration flow, and thus the uptake of minerals, including Si (Grašič et al 2019a,b). The solubility of plant-available Si increases markedly with increased pH (Milne et al 2014, Klotzbücher et al 2018. Miles et al (2014) studied the relation between CaCl2extractable Si and soil pH for 112 soils, and showed that the content ranged from 10 to 100 mg kg -1 of soil dry matter as pH increased from 4 to 7.…”

Section: Discussionmentioning

confidence: 99%

Do soil and leaf silicon content affect leaf functional traits in Deschampsia caespitosa from different habitats?

Grašič¹,

Sakovič²,

Abram³

et al. 2020

Biologia plant.

View full text Add to dashboard Cite

The purpose of this study was to show the extent of phenotypic plasticity of the grass Deschampsia caespitosa from four habitats with different soil properties by comparing selected leaf traits and content of silicon and other elements. Morphological, biochemical, and optical properties were examined in leaves, but content of silicon and other elements also in soil samples. Plant-available silicon in the soil was determined following extraction in CaCl2. Bulk element analysis was conducted using X-ray fluorescence spectrometry. The habitats of D. caespitosa differed significantly according to soil structure, which resulted in significantly different leaf traits, including leaf optical properties and content of minerals. There was no correlation between leaf silicon and plant-available or total soil silicon, while positive correlation was seen between leaf calcium and total soil calcium. In addition, plant-available silicon showed strong positive correlation with leaf calcium and phosphorus. The majority of D. caespitosa leaf and soil properties differed significantly among habitats.

show abstract

Impact of agricultural practices on plant-available silicon

Cited by 30 publications

References 15 publications

Effects of phytolithic rice-straw biochar, soil buffering capacity and pH on silicon bioavailability

Effects of phytolithic rice-straw biochar, soil buffering capacity and pH on silicon bioavailability

Silicon Effects on Biomass Carbon and Phytolith-Occluded Carbon in Grasslands Under High-Salinity Conditions

Do soil and leaf silicon content affect leaf functional traits in Deschampsia caespitosa from different habitats?

Contact Info

Product

Resources

About