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The potential for carbon bio-sequestration in China's paddy rice (Oryza sativa L.) as impacted by slag-based silicate fertilizer.

Song A, Ning D, Fan F, Li Z, Provance-Bowley M, Liang Y - Sci Rep (2015)

Bottom Line: Silicon (Si), deposited as phytoliths during plant growth, has been shown to occlude organic carbon, which may prove to have significant effects on the biogeochemical sequestration of atmospheric CO2.However, the potential exists to increase PhytOC levels to 1.16-2.17 × 10(6) tonnes CO2 yr(-1) with silicate fertilizer additions.Therefore, providing silicate fertilizer during rice production may serve as an effective tool in improving atmospheric CO2 sequestration in global rice production areas.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China.

ABSTRACT
Rice is a typical silicon-accumulating plant. Silicon (Si), deposited as phytoliths during plant growth, has been shown to occlude organic carbon, which may prove to have significant effects on the biogeochemical sequestration of atmospheric CO2. This study evaluated the effects of silicate fertilization on plant Si uptake and carbon bio-sequestration in field trials on China's paddy soils. The results showed (1) Increased Si concentrations in rice straw with increasing application rates of silicate fertilizer; (2) Strong positive correlations between phytolith contents and straw SiO2 contents and between phytolith contents and phytolith-occluded carbon (PhytOC) contents in rice straw; (3) Positive correlations between the phytolith production flux and either the above-ground net primary productivity (ANPP) or the PhytOC production rates; (4) Increased plant PhytOC storage with increasing application rates of silicate fertilizer. The average above-ground PhytOC production rates during China's rice production are estimated at 0.94 × 10(6) tonnes CO2 yr(-1) without silicate fertilizer additions. However, the potential exists to increase PhytOC levels to 1.16-2.17 × 10(6) tonnes CO2 yr(-1) with silicate fertilizer additions. Therefore, providing silicate fertilizer during rice production may serve as an effective tool in improving atmospheric CO2 sequestration in global rice production areas.

No MeSH data available.


Correlation between phytolith contents (%) and silica contents in rice straw (%) at the five sites tested (P < 0.01, n = 90).
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f2: Correlation between phytolith contents (%) and silica contents in rice straw (%) at the five sites tested (P < 0.01, n = 90).

Mentions: The percent phytolith contents in rice straw at the five sites ranged from 4.30% to 10.40% (Table 1), with the lowest levels recorded for the LH CK plots, and the highest levels recorded for the QH Si3000 plots. A trend was seen in increasing phytolith concentrations with increasing rates of silicate fertilizer applications (Table 1). There was also a significant correlation between the silica contents in rice straw and the phytolith contents in rice straw (Fig. 2).


The potential for carbon bio-sequestration in China's paddy rice (Oryza sativa L.) as impacted by slag-based silicate fertilizer.

Song A, Ning D, Fan F, Li Z, Provance-Bowley M, Liang Y - Sci Rep (2015)

Correlation between phytolith contents (%) and silica contents in rice straw (%) at the five sites tested (P < 0.01, n = 90).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4664901&req=5

f2: Correlation between phytolith contents (%) and silica contents in rice straw (%) at the five sites tested (P < 0.01, n = 90).
Mentions: The percent phytolith contents in rice straw at the five sites ranged from 4.30% to 10.40% (Table 1), with the lowest levels recorded for the LH CK plots, and the highest levels recorded for the QH Si3000 plots. A trend was seen in increasing phytolith concentrations with increasing rates of silicate fertilizer applications (Table 1). There was also a significant correlation between the silica contents in rice straw and the phytolith contents in rice straw (Fig. 2).

Bottom Line: Silicon (Si), deposited as phytoliths during plant growth, has been shown to occlude organic carbon, which may prove to have significant effects on the biogeochemical sequestration of atmospheric CO2.However, the potential exists to increase PhytOC levels to 1.16-2.17 × 10(6) tonnes CO2 yr(-1) with silicate fertilizer additions.Therefore, providing silicate fertilizer during rice production may serve as an effective tool in improving atmospheric CO2 sequestration in global rice production areas.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Plant Nutrition and Fertilizer, Ministry of Agriculture, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, P.R. China.

ABSTRACT
Rice is a typical silicon-accumulating plant. Silicon (Si), deposited as phytoliths during plant growth, has been shown to occlude organic carbon, which may prove to have significant effects on the biogeochemical sequestration of atmospheric CO2. This study evaluated the effects of silicate fertilization on plant Si uptake and carbon bio-sequestration in field trials on China's paddy soils. The results showed (1) Increased Si concentrations in rice straw with increasing application rates of silicate fertilizer; (2) Strong positive correlations between phytolith contents and straw SiO2 contents and between phytolith contents and phytolith-occluded carbon (PhytOC) contents in rice straw; (3) Positive correlations between the phytolith production flux and either the above-ground net primary productivity (ANPP) or the PhytOC production rates; (4) Increased plant PhytOC storage with increasing application rates of silicate fertilizer. The average above-ground PhytOC production rates during China's rice production are estimated at 0.94 × 10(6) tonnes CO2 yr(-1) without silicate fertilizer additions. However, the potential exists to increase PhytOC levels to 1.16-2.17 × 10(6) tonnes CO2 yr(-1) with silicate fertilizer additions. Therefore, providing silicate fertilizer during rice production may serve as an effective tool in improving atmospheric CO2 sequestration in global rice production areas.

No MeSH data available.