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美国中西部地区通过增强气候变化的直接测量影响改善了碳净预算

Ilsa B Kantola^1,2, Elena Blanc-Betes³, Michael D Masters¹

¹Institute for Sustainability, Energy, and Environment, Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois, USA.

Global change biology

|August 17, 2023

概括

在玉米,大豆和虫等作物上使用石灰尘进行增强的气候处理 (EW) 显示出显著的二氧化碳去除 (CDR) 潜力. 同时部署EW与miscanthus提高了产量,并实现了显著的CDR,而玉米/大豆的EW部分抵消了土壤碳损失.

科学领域:

地球和环境科学地球和环境科学
农业科学农业科学
气候科学气候科学

背景情况:

陆地增强气候处理 (EW) 将富含Mg或Ca的岩石尘埃应用于土壤,作为负排放技术.
电气工程有潜力通过隔离大气中的二氧化碳来减轻气候变化影响.
之前的研究已经探讨了EW的有效性,但不同作物系统的长期实地数据有限.

研究的目的:

在四年内量化陆地增强气候 (EW) 的有效性.
评估EW对美国中西部玉米/大豆和杂草种植系统碳预算的影响.
在这些农业环境中确定EW的二氧化碳去除 (CDR) 能力.

主要方法:

在50t ha-1年−1的地面玄武岩被应用到玉米/大豆和杂草田.
碳预算元素使用的共变率,土壤碳流量和生物质评估进行了测量.
气候变化的Mg和Ca向深层土壤的移动和性流量被用来量化二氧化碳吸收.

主要成果:

在这两种作物系统中,岩应用刺激了生物质生产和初级净产量.
在玉米/大豆系统中,EW部分抵消了碳损失 (23%-42%的抵消).
米斯坎图斯系统显示净碳增加,EW增加了无机碳储存额外的234gCm-2年-1.1.

结论:

同时部署的EW与miscanthus显著增加作物产量 (29%-42%) 和CDR (8.6二氧化碳每小时-1年-1).
应用于玉米/大豆系统的EW实现了3.7t CO2 ha-1年-1的CDR,部分抵消了土壤碳损失.
美国中西部的气候改善为多年生生物能源和传统排列作物的碳预算提供了可衡量的改善.

关键词:

农业农业农业农业生物能源作物生物能源作物碳预算就是碳预算.二氧化碳的去除,二氧化碳的除去.的共变性的共变性增强了气候变化的增强.生态系统的碳净平衡.净初级产量的初级产量.土壤呼吸系统土壤呼吸系统

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