Assessing production of phytolith and phytolith occluded carbon in above-ground biomass of intensively cultivated rice ecosystems in India
| Autor: | Mohsina Anjum, Prakash Basavarajappa Nagabovanalli |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Carbon Management, Vol 12, Iss 5, Pp 509-519 (2021) |
| Druh dokumentu: | article |
| ISSN: | 1758-3004 1758-3012 17583004 |
| DOI: | 10.1080/17583004.2021.1978552 |
| Popis: | Carbon (C) occluded in phytoliths is stable and an important source of long-term C storage into the agroecosystems. As a silicon (Si) accumulator crop, rice produces a large amount of phytolith occluded carbon (PhytOC) and which plays a crucial role in the coupled biogeochemical cycle of C and Si. In this study, we sampled above ground biomass from 22 intensively cultivated rice ecosystems to evaluate the rate of C sequestration through phytoliths. Depending on the rice varieties there exist a great variability in PhytOC content (0.12–0.26%) across the rice ecosystems. The collected samples were further classified into three groups: viz., long (>140 days), medium (125–140 days) and short duration ( 0.05) whereas, the PhytOC content found to be significant (p 140 days) varieties showed 69.7% and 164.0% higher PhytOC sequestration flux over medium and short-duration varieties, respectively. Our results suggest that the Indian rice ecosystems sequester 0.95 Tg CO2 yr−1 through Phytoliths, which is equivalent to the 15.5% of PhytOC sink in the global rice field. Considering the PhytOC flux of relatively higher PhytOC accumulating long duration varieties, the annual PhytOC sink rate in the Indian rice ecosystems can be increased to ∼4 folds over the current rate. It was revealed that the selection of higher PhytOC accumulating long duration varieties can enhance the phytolith C sequestration. |
| Databáze: | Directory of Open Access Journals |
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