Dynamics of CO2 Emission and Biochemical Properties of a Sandy Calcareous Soil Amended with Conocarpus Waste and Biochar

El-Mahrouky, Mohamed; El-Naggar, Ahmed H.; Usman, Adel R.A.; Al-Wabel, Mohammad I.

doi:10.1016/s1002-0160(14)60075-8

Cited by 47 publications

(18 citation statements)

References 43 publications

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“…Biochar application to soil enriched the soil carbon pools in all particle‐size fractions (Table ). This is due to the potential of biochar for promoting soil carbon sequestration by increasing the TC content of soil (El‐Mahrouky, El‐Naggar, Usman, & Al‐Wabel, ; Xu et al, ). Coarse sand‐size fraction contained higher TC than other fractions.…”

Section: Resultsmentioning

confidence: 99%

Biochar influences soil carbon pools and facilitates interactions with soil: A field investigation

et al. 2018

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Biochar promotes the storage of organic carbon (OC) in soils. OC is unevenly distributed in soils among different particle‐size fractions showing different structures, functions, and stability. The objective of this study was to investigate the biochar–soil interactions and the redistribution of soil C in different soil fractions based on a 2‐year field experiment. Fractionation was done by particle sizes including coarse sand (250–2,000 μm), fine sand (53–250 μm), and silt/clay (<53 μm). Integrated spectroscopic techniques were employed to examine physical characteristics of biochar–soil interactions in different soil fractions. Application of biochar increased OC by 37%, 42%, and 76% in soil particle‐size fractions of 53–250, <53, and 250–2,000 μm, respectively. This was supported by X‐ray fluorescence spectroscopy analysis, which showed an increase of C contents by 5–56% with biochar addition. The highest increment in OC was found in coarse sand fraction, and redistribution of OC was detected depending on various soil particle sizes. Results of scanning electron microscopy combined with electron dispersive X‐ray spectroscopy analysis showed the interactions between soil and biochar, which could be attributed to oxidized functional groups (OCO, CO, and CO) captured by the X‐ray photoelectron spectroscopy. The long‐term aged biochar could be beneficial to enhance soil quality by promoting OC storage and facilitating positive biochar–soil interactions.

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Section: Resultsmentioning

confidence: 99%

Biochar influences soil carbon pools and facilitates interactions with soil: A field investigation

et al. 2018

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“…Some studies have reported that BC addition increased soil DOC in the short-term [50–51]. However, Jones et al [52] observed that BC addition to soil had less or no effect on DOC in a three-year study.…”

Section: Discussionmentioning

confidence: 99%

Short-Term Responses of Soil Respiration and C-Cycle Enzyme Activities to Additions of Biochar and Urea in a Calcareous Soil

et al. 2016

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Biochar (BC) addition to soil is a proposed strategy to enhance soil fertility and crop productivity. However, there is limited knowledge regarding responses of soil respiration and C-cycle enzyme activities to BC and nitrogen (N) additions in a calcareous soil. A 56-day incubation experiment was conducted to investigate the combined effects of BC addition rates (0, 0.5, 1.0, 2.5 and 5.0% by mass) and urea (U) application on soil nutrients, soil respiration and C-cycle enzyme activities in a calcareous soil in the North China Plain. Our results showed soil pH values in both U-only and U plus BC treatments significantly decreased within the first 14 days and then stabilized, and CO2emission rate in all U plus BC soils decreased exponentially, while there was no significant difference in the contents of soil total organic carbon (TOC), dissolved organic carbon (DOC), total nitrogen (TN), and C/N ratio in each treatment over time. At each incubation time, soil pH, electrical conductivity (EC), TOC, TN, C/N ratio, DOC and cumulative CO2 emission significantly increased with increasing BC addition rate, while soil potential activities of the four hydrolytic enzymes increased first and then decreased with increasing BC addition rate, with the largest values in the U + 1.0%BC treatment. However, phenol oxidase activity in all U plus BC soils showed a decreasing trend with the increase of BC addition rate. Our results suggest that U plus BC application at a rate of 1% promotes increases in hydrolytic enzymes, does not highly increase C/N and C mineralization, and can improve in soil fertility.

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“…Moreover, the effect of biochar on pH of alkaline soils was investigated by Liu, Han, and Zhang (), who showed that the alkaline biochar application did not lead to increase in the values of soil pH but showed a declining trend in soil pH with higher biochar application rates of, mainly due to, producing acidic materials through oxidation and decomposition of biochars. The impacts of biochar application on alkaline soils have been previously discussed by several researchers (El‐Mahrouky et al, ; Usman et al, ; Zhang, Bian, et al, ; Zhang, Liu, et al, ; Zhang, Pan, et al, ), who have shown that biochar application may (or may not) affect the chemical properties of soil, but its impact varies depending upon the type of feedstock and under what pyrolysis conditions the biochar is made as well as upon its application rates. In a study conducted by Chan et al () investigated the agronomic values of green‐waste biochar as an amendment for the highly acidic soil containing low quantity of organic matter, and observed significant increases in soil pH, organic carbon, and CEC at higher rates of biochar application (50 t ha −1 ), but no significant effect was noticed at low application rate of 10 t ha −1 .…”

Section: Biochar As Soil Amelioratormentioning

confidence: 99%

Impact of biochar properties on soil conditions and agricultural sustainability: A review

et al. 2017

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This review summarizes the influences of pyrolysis conditions and feedstock types on biochar properties and how biochar properties in turn affect soil properties. Mechanistic evidence of biochar's potential for enhancing crop productivity, carbon sequestration, and nutrient use efficiency are also discussed. The review identifies the knowledge gaps, limitations, and future research directions for large‐scale use of biochar. Both pyrolytic parameters and feedstock types are considered to be the main factors controlling biochar properties such as nutrient content, recalcitrance, and pH. Biochar produced at low temperatures may improve nutrient availability and crop yield in acidic and alkaline soils, whereas high‐temperature biochar may enhance long‐term soil carbon sequestration. Biochar can also improve the efficiency of inorganic and organic fertilizers by enhancing microbial functions and reducing nutrient loss, thereby making nutrients more available to plants. Integration of biochar and chemical or organic fertilizers generally provides for better nutrient management and crop yield in most types of soils. Although biochar can improve degraded soils, it is not a panacea; as such, soil‐ and crop‐specific biochar are needed in order to ensure optimum crop yield and agricultural sustainability.

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Dynamics of CO2 Emission and Biochemical Properties of a Sandy Calcareous Soil Amended with Conocarpus Waste and Biochar

Cited by 47 publications

References 43 publications

Biochar influences soil carbon pools and facilitates interactions with soil: A field investigation

Biochar influences soil carbon pools and facilitates interactions with soil: A field investigation

Short-Term Responses of Soil Respiration and C-Cycle Enzyme Activities to Additions of Biochar and Urea in a Calcareous Soil

Impact of biochar properties on soil conditions and agricultural sustainability: A review

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