Influence of the application of charred and uncharred spent coffee grounds on soil Carbon and Nitrogen cycles

IF 2.3 4区农林科学 Q1 AGRONOMY

Archives of Agronomy and Soil Science Pub Date : 2023-05-19 DOI:10.1080/03650340.2023.2214079

A. Cervera-Mata, C. Mondini, A. Fernández-Arteaga, T. Sinicco, G. Delgado

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引用次数: 0

Abstract

ABSTRACT Spent coffee grounds (SCG) and derived products have characteristics (high content of carbon and nutrients) that make them potentially useful as soil amendments. To evaluate the impact of SCG and derived products on soil functionality, an incubation (30 days) was performed with a soil amended with different doses (0.5, 1 and 1.75%) of SCG, a biochar produced from SCG at 270 °C (B270) and a hydrochar produced from SCG at 200 °C (H200). During incubation, the following parameters were measured: CO2 and N2O emissions, extractable organic Carbon (EOC), extractable Nitrogen (EN), NO3 − and NH4 +, microbial biomass Carbon (BC) and Nitrogen (BN). Soil amended with the most degradable materials (SCG and H200) showed greater amounts of CO2, BC and EOC, but also N immobilization. B270 was the most efficient amendment for the retention of added C and led to less N immobilization when compared with SCG and H200. SCG derived amendments can fulfil different functions in soil: SCG and H200 are more indicated for increasing C mineralization and microbial pool, while B270 is more effective at enhancing organic C levels. Higher rates of application generally led to more positive impacts on soil functioning, with the only limitation being short-term N immobilization.

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施用烧焦和未烧焦的废咖啡渣对土壤碳氮循环的影响

摘要废咖啡渣（SCG）及其衍生产品具有高碳含量和高营养素含量的特点，有可能用作土壤改良剂。为了评估SCG及其衍生产品对土壤功能的影响，培养（30 天）用不同剂量（0.5%、1%和1.75%）的SCG、在270°C下由SCG产生的生物炭（B270）和在200°C下从SCG生产的水炭（H200）改良的土壤进行。在培养过程中，测量了以下参数：CO2和N2O排放量、可提取有机碳（EOC）、可提取氮（EN）、NO3−和NH4+、微生物生物量碳（BC）和氮（BN）。用最易降解材料（SCG和H200）改良的土壤显示出更大量的CO2、BC和EOC，但也表现出氮的固定化。与SCG和H200相比，B270是保留添加的C的最有效的修饰剂，并导致较少的N固定化。SCG衍生的改良剂可以在土壤中发挥不同的功能：SCG和H200更适合增加碳矿化和微生物库，而B270更有效地提高有机碳水平。较高的施用率通常会对土壤功能产生更积极的影响，唯一的限制是短期固定氮。

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来源期刊

Archives of Agronomy and Soil Science AGRONOMY-SOIL SCIENCE

CiteScore

5.50

自引率

4.20%

发文量

107

期刊介绍： rchives of Agronomy and Soil Science is a well-established journal that has been in publication for over fifty years. The Journal publishes papers over the entire range of agronomy and soil science. Manuscripts involved in developing and testing hypotheses to understand casual relationships in the following areas: plant nutrition fertilizers manure soil tillage soil biotechnology and ecophysiology amelioration irrigation and drainage plant production on arable and grass land agroclimatology landscape formation and environmental management in rural regions management of natural and created wetland ecosystems bio-geochemical processes soil-plant-microbe interactions and rhizosphere processes soil morphology, classification, monitoring, heterogeneity and scales reuse of waste waters and biosolids of agri-industrial origin in soil are especially encouraged. As well as original contributions, the Journal also publishes current reviews.