Ammonia and nitrous oxide emissions from a field Ultisol amended with tithonia green manure, urea, and biochar

Fungo, Bernard; Lehmann, Johannes; Kalbitz, Karsten; Thiong’o, Margaret; Tenywa, Moses; Okeyo, Irene; Neufeldt, Henry

doi:10.1007/s00374-018-01338-3

Cited by 53 publications

(21 citation statements)

References 62 publications

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“…The addition of biochar reduced N 2 O emissions by 15% from acidic soil in a vegetable field (Wang et al 2015). In a study by Fungo et al (2019), addition of biochar reduced cumulative emissions of NH 3 and N 2 O by 47% and 22%, respectively, over 3 years, which indicated that biochar has a residual effect on gaseous emissions of N.…”

Section: Gaseous Emissionmentioning

confidence: 98%

Biochar and its importance on nutrient dynamics in soil and plant

Hossain

Bahar

Sarkar

et al. 2020

Biochar

429

125

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Biochar, an environmentally friendly soil conditioner, is produced using several thermochemical processes. It has unique characteristics like high surface area, porosity, and surface charges. This paper reviews the fertilizer value of biochar, and its effects on soil properties, and nutrient use efficiency of crops. Biochar serves as an important source of plant nutrients, especially nitrogen in biochar produced from manures and wastes at low temperature (≤ 400 °C). The phosphorus, potassium, and other nutrient contents are higher in manure/waste biochars than those in crop residues and woody biochars. The nutrient contents and pH of biochar are positively correlated with pyrolysis temperature, except for nitrogen content. Biochar improves the nutrient retention capacity of soil, which depends on porosity and surface charge of biochar. Biochar increases nitrogen retention in soil by reducing leaching and gaseous loss, and also increases phosphorus availability by decreasing the leaching process in soil. However, for potassium and other nutrients, biochar shows inconsistent (positive and negative) impacts on soil. After addition of biochar, porosity, aggregate stability, and amount of water held in soil increase and bulk density decreases. Mostly, biochar increases soil pH and, thus, influences nutrient availability for plants. Biochar also alters soil biological properties by increasing microbial populations, enzyme activity, soil respiration, and microbial biomass. Finally, nutrient use efficiency and nutrient uptake improve with the application of biochar to soil. Thus, biochar can be a potential nutrient reservoir for plants and a good amendment to improve soil properties.

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Section: Gaseous Emissionmentioning

confidence: 98%

Biochar and its importance on nutrient dynamics in soil and plant

Hossain

Bahar

Sarkar

et al. 2020

Biochar

429

125

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“…As a stable form of carbon, biochar can stay thousands of years in the soil [33]. Incorporating it into agricultural soils may represent an important strategy for GHG reduction by retaining the carbon within the soils in a biosequestration process [34,35]. Several studies showed that biochar addition to agricultural soils decreased N 2 O emissions [36][37][38][39] as a result of an increase in soil pH [40], adsorption of NO 3 , NH 4 + , N 2 O [41][42][43], and the toxic effect of biochar organic compounds (nitrifier and denitrifier communities) [44,45].…”

Section: Introductionmentioning

confidence: 99%

A Sustainable Approach for Improving Soil Properties and Reducing N2O Emissions Is Possible through Initial and Repeated Biochar Application

et al. 2021

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Recent findings of changing climate, water scarcity, soil degradation, and greenhouse gas emissions have brought major challenges to sustainable agriculture worldwide. Biochar application to soil proves to be a suitable solution to these problems. Although the literature presents the pros and cons of biochar application, very little information is available on the impact of repeated application. In this study, we evaluate and discuss the effects of initial and reapplied biochar (both in rates of 0, 10, and 20 t ha−1) combined with N fertilization (at doses of 0, 40, and 80 kg ha−1) on soil properties and N2O emission from Haplic Luvisol in the temperate climate zone (Slovakia). Results showed that biochar generally improved the soil properties such as soil pH(KCl) (p ≤ 0.05; from acidic towards moderately acidic), soil organic carbon (p ≤ 0.05; an increase from 4% to over 100%), soil water availability (an increase from 1% to 15%), saturated hydraulic conductivity (an increase from 5% to 95%). The effects were more significant in the following cases: repeated rather than single biochar application, higher rather than lower biochar application rates, and higher rather than lower N fertilization levels. Initial and repeated biochar applications, leading to N2O emissions reduction, can be related to increased soil pH(KCl).

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“…There does appear to be the possibility of similar behavior across different biochar types. For instance, biochar as a short-term mitigation tool to reduce nitrous oxide and ammonia emissions has been more consistently reported, for example, by Fidel et al (2019) and Fungo et al (2019). However, biochar's effect on CO 2 emission is less consistent.…”

Section: Introductionmentioning

confidence: 99%

Biochar insights from laboratory incubations monitoring O2 consumption and CO2 production

Almeida

Spokas

Teixeira

et al. 2019

Biochar

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Biochar has been touted as a long-term carbon sequestration tool. However, there are no studies evaluating biochar's effect on oxygen (O 2) consumption as a measure of the microbial respiration response to biochar. To gain insight into this aspect, we evaluated O 2 consumption rates to test the hypothesis that biochar is an efficient agent for carbon dioxide (CO 2) sequestration in soils. Four different biochar types and one activated charcoal were incubated alone and associated with three different soils for approximately 2 months in laboratory incubations. Headspace concentration of CO 2 and O 2 was periodically quantified. The data presented here confirm that the CO 2 production following biochar's addition to soils results in a process that is correlated to oxygen consumption. However, this overall stimulation is not clearly related to biochar type. Activated carbon resulted in the highest statistically significant stimulation of activity, despite it possessing the lowest quantity of volatile carbon and mineral nutrient sources. Taking into consideration our results, we conclude that using biochar does achieve total carbon sequestration. However, the amount of available soil organic carbon following soil incorporation appears to be reduced following biochar addition and its long-term implication on this mineralizable soil organic carbon pool does deserve more research attention.

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Ammonia and nitrous oxide emissions from a field Ultisol amended with tithonia green manure, urea, and biochar

Cited by 53 publications

References 62 publications

Biochar and its importance on nutrient dynamics in soil and plant

Biochar and its importance on nutrient dynamics in soil and plant

A Sustainable Approach for Improving Soil Properties and Reducing N2O Emissions Is Possible through Initial and Repeated Biochar Application

Biochar insights from laboratory incubations monitoring O2 consumption and CO2 production

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