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Usage of biochar for mitigation of CO2 emission and enhancement of CH4 consumption in forest and orchard Haplic Luvisol (Siltic) soils
Applied Soil Ecology ( IF 4.8 ) Pub Date : 2020-12-01 , DOI: 10.1016/j.apsoil.2020.103711
Anna Walkiewicz , Kira Kalinichenko , Adam Kubaczyński , Małgorzata Brzezińska , Andrzej Bieganowski

Abstract It has been reported that biochar changes the properties of soil and has beneficial environmental and agrotechnical consequences, especially in degraded lands, including those affected by climate change. We added wood biochar (produced from fir sawdust by pyrolysis at 650 °C) to soil collected from a forest and an adjacent long-term cultivated orchard to test the short-term response of soil respiration and methanotrophy under moisture levels of 100% and 55% water holding capacity (WHC). In the controls of the respiration studies (without biochar), CO2 emission was generally higher under 55% than 100% WHC in both soils. Biochar application to the forest soil resulted in a significant reduction of the CO2 emission rate under both WHC levels. This is in contrast with the orchard soil, where the CO2 emission rate was not significantly changed (55% WHC) or even stimulated (100% WHC). Regardless of the moisture level, the CO2 emission and O2 consumption was higher in the forest soil than in orchard soil. In the controls of the methanotrophic study, only slight CH4 consumption was observed in both the tested water-content conditions. The biochar effect was dependent on the WHC level. Under 100% WHC, CH4 was completely consumed in both soils with different lag durations. However, under 55% WHC, methanotrophy was stimulated by biochar only in the orchard soil. We concluded that the short-term response of soil respiration and methanotrophy to biochar amendment is influenced by land use and strongly depends on soil moisture conditions. We showed the effectiveness of biochar addition as a method to limit CO2 emission in non-saturated forest soil, and to increase CH4 uptake in saturated soils, regardless of land use, which confirms its efficiency in reducing the greenhouse effect.

中文翻译:

使用生物炭减少森林和果园中的 CO2 排放和增加 CH4 消耗量 Haplic Luvisol (Siltic) 土壤

摘要 据报道,生物炭改变了土壤的性质,并具有有益的环境和农业技术后果,特别是在退化土地,包括受气候变化影响的土地上。我们将木材生物炭(由冷杉木屑在 650 °C 下热解产生)添加到从森林和邻近的长期栽培果园收集的土壤中,以测试在 100% 和 55% 的湿度水平下土壤呼吸和甲烷营养的短期响应% 持水量 (WHC)。在呼吸研究的对照(无生物炭)中,两种土壤中 55% 以下的 CO2 排放量通常高于 100% WHC。在两种 WHC 水平下,将生物炭应用于森林土壤导致二氧化碳排放率显着降低。这与果园土壤形成对比,其中 CO2 排放率没有显着变化(55% WHC)甚至没有受到刺激(100% WHC)。无论湿度水平如何,森林土壤的 CO2 排放量和 O2 消耗量均高于果园土壤。在甲烷营养研究的对照中,在两种测试的含水量条件下仅观察到少量的 CH4 消耗。biochar 效应取决于 WHC 水平。在 100% WHC 下,两种土壤中 CH4 被完全消耗,具有不同的滞后时间。然而,在 55% WHC 下,甲烷营养仅在果园土壤中受到生物炭的刺激。我们得出的结论是,土壤呼吸和甲烷营养对生物炭修正的短期响应受土地利用的影响,并且在很大程度上取决于土壤水分条件。
更新日期:2020-12-01
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