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首页> 外文期刊>Soil Research >Changes in total soil organic carbon stocks and carbon fractions in sugarcane systems as affected by tillage and trash management in Queensland, Australia. (Special Issue: Soil carbon in Australia's agricultural lands.)
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Changes in total soil organic carbon stocks and carbon fractions in sugarcane systems as affected by tillage and trash management in Queensland, Australia. (Special Issue: Soil carbon in Australia's agricultural lands.)

机译：受澳大利亚昆士兰州耕作和垃圾处理影响，甘蔗系统中土壤有机碳总量和碳组分的变化。 （特刊：澳大利亚农业用地的土壤碳。）

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摘要

The use of sugarcane trash (tops and residue) retention systems has been reported to lead to increases in total soil organic carbon (TOC) stocks. However, these increases have generally been small and confined to the top 0.05 m of the soil profile. It has been hypothesised that the amount of TOC sequestered could be increased if the intensive tillage that occurs at the end of a sugarcane ratoon cycle, which is known to decrease TOC, could be eliminated. This research examined the effect of no-till management and/or trash retention on four trial sites throughout Queensland, to assess the ability of this management to increase TOC stocks. Management effects on particulate organic carbon (POC), humus organic carbon (HOC), and resistant organic carbon (ROC) stocks were also assessed using mid-infrared spectroscopy. No significant changes in TOC, POC, HOC, or ROC were observed over either 0-0.1 or 0-0.3 m depth at any of the sites examined, when sites were considered as a whole. The results indicate that these management practices currently have limited capacity to increase TOC stocks on these soil types over 0-0.1 or 0-0.3 m depth for the purposes of carbon sequestration.
机译：据报道，使用甘蔗垃圾（顶部和残渣）截留系统导致土壤有机碳（TOC）总量增加。但是，这些增加通常很小，并且仅限于土壤剖面的顶部0.05 m。假设如果消除在甘蔗再生周期结束时发生的密集耕作（已知会降低TOC），则可以增加隔离的TOC量。这项研究检查了免耕管理和/或垃圾保留对昆士兰州四个试验地点的影响，以评估这种管理增加TOC库存的能力。还使用中红外光谱法评估了对颗粒有机碳（POC），腐殖质有机碳（HOC）和抗性有机碳（ROC）原料的管理效果。如果将站点视为一个整体，则在0-0.1或0-0.3 m的深度范围内，在任何站点上都未观察到TOC，POC，HOC或ROC的显着变化。结果表明，这些管理实践目前对于碳固存目的而言，在这些土壤类型上增加TOC储量的能力有限，深度超过0-0.1或0-0.3 m。

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