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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Role of phytolith occluded carbon of crop plants for enhancing soil carbon sequestration in agro-ecosystems
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Role of phytolith occluded carbon of crop plants for enhancing soil carbon sequestration in agro-ecosystems

机译：作物植物的植硅体封堵碳在促进农业生态系统中固碳的作用

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摘要

Phytolith occluded carbon (PhytOC) which is stable in the soil environment is considered to be an important fraction of soil organic carbon and substantially contributes to the terrestrial carbon sequestration for long periods (millennia). Phytoliths are silica bodies produced by plants as a result of biomineralization process. During this process, occlusion of carbon also takes place within the phytoliths. Some of the major agricultural crops like barley, maize, rice, sorghum, sugarcane and wheat are known to be prolific producers of phytolith and PhytOC. In India, an estimate indicates that these crops may annually contribute about 87 million tonnes (mt) of PhytOC. Hence, a great potential exists to enhance PhytOC accumulation in the soils of various agro-ecosystems. The rate of phytolith production and the carbon occluded in phytoliths vary among the plant community. In India, an estimate indicates that these crops may annually contribute about 87 mt of PhytOC and growing high PhytOC-yielding cultivars of these crops may additionally produce 1.05 mt of PhytOC. Therefore, selection of high PhytOC-yielding cultivars over low PhytOC-yielding cultivars for agricultural production under different agro-ecosystems offers an opportunity to enhance terrestrial carbon sequestration.
机译：在土壤环境中稳定的植物邻苯二甲酸酯吸附的碳（PhytOC）被认为是土壤有机碳的重要组成部分，并在长期（千年）中对​​陆地碳的固存做出了重要贡献。植硅石是植物由于生物矿化过程而产生的二氧化硅。在此过程中，植硅体中也会发生碳的吸留。众所周知，一些主要的农业作物，例如大麦，玉米，水稻，高粱，甘蔗和小麦，是植物硅酸盐和PhytOC的多产者。在印度，据估计，这些作物每年可能贡献约8700万吨的PhytOC。因此，存在增强各种农业生态系统土壤中PhytOC积累的巨大潜力。植物群落中植硅石的产生速率和吸留在植硅石中的碳各不相同。在印度，据估计，这些作物每年可贡献约87吨的PhytOC，而这些作物的高PhytOC产量高品种可能另外产生1.05 mt的PhytOC。因此，在不同农业生态系统下为农业生产选择高产PhytOC的品种而不是低产PhytOC的品种，提供了增强陆地碳固存的机会。

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