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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.


Effect of silicate fertilizer application rate on post-harvest soil available Si contents (a) and silica contents in rice straw (b) at the five sites.Data are means of three replicates. Mean values followed by different letters at the same site differ significantly at the (P < 0.05) level of significance.
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f1: Effect of silicate fertilizer application rate on post-harvest soil available Si contents (a) and silica contents in rice straw (b) at the five sites.Data are means of three replicates. Mean values followed by different letters at the same site differ significantly at the (P < 0.05) level of significance.

Mentions: Post-harvest soil Si concentrations at the five sites tended to increase with increasing silicate fertilizer application rates (Fig. 1a). At Longhui (LH) and Lengshuitan (LST), soils receiving the highest silicate fertilizer application rates (Si1500 and Si3000) also had highest post-harvest Si levels. At Xiangyin (XY) and Qionghai (QH), soil Si concentrations tended to increase with increasing silicate fertilizer application rates. At Danzhou (DZ), positive effects of silicate fertilizer were seen at all application rates above 300 kg ha−1.


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)

Effect of silicate fertilizer application rate on post-harvest soil available Si contents (a) and silica contents in rice straw (b) at the five sites.Data are means of three replicates. Mean values followed by different letters at the same site differ significantly at the (P < 0.05) level of significance.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

f1: Effect of silicate fertilizer application rate on post-harvest soil available Si contents (a) and silica contents in rice straw (b) at the five sites.Data are means of three replicates. Mean values followed by different letters at the same site differ significantly at the (P < 0.05) level of significance.
Mentions: Post-harvest soil Si concentrations at the five sites tended to increase with increasing silicate fertilizer application rates (Fig. 1a). At Longhui (LH) and Lengshuitan (LST), soils receiving the highest silicate fertilizer application rates (Si1500 and Si3000) also had highest post-harvest Si levels. At Xiangyin (XY) and Qionghai (QH), soil Si concentrations tended to increase with increasing silicate fertilizer application rates. At Danzhou (DZ), positive effects of silicate fertilizer were seen at all application rates above 300 kg ha−1.

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.