Biochar increases plant growth and alters microbial communities via regulating the moisture and temperature of green roof substrates

Chen, Haoming; Ma, Jing; Wei, Jiaxing; Gong, Xin; Yu, Xin; Guo, Hui; Zhao, Yanwen

doi:10.1016/j.scitotenv.2018.04.127

Cited by 114 publications

(41 citation statements)

References 70 publications

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“…This showed that an increase in temperature led to greater dehydration and decarboxylation 34 . Similar variations in functional groups of the biomass post pyrolysis have been reported in previous literature 20,35‐37 . In summary, FTIR analysis shows the loss of carboxyl, hydroxyl, and carbonyl groups in raw biomass during pyrolysis leaves behind carbon‐rich biochar with high CV.…”

Section: Resultssupporting

confidence: 85%

“…34 Similar variations in functional groups of the biomass post pyrolysis have been reported in previous literature. 20,[35][36][37] In summary, FTIR analysis shows the loss of carboxyl, hydroxyl, and carbonyl groups in raw biomass during pyrolysis leaves behind carbonrich biochar with high CV. This could be used as solid fuel.…”

Section: Crystalline Structure and Chemical Compositionmentioning

confidence: 98%

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A comparative study on synthesis and characterization of biochars derived from lignocellulosic biomass for their candidacy in agronomy and energy applications

et al. 2020

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Summary This study has dealt with the synthesis and characterization of biochars produced from three biomasses, viz. water hyacinth (whole plant and its components), yellow oleander, and sugarcane bagasse, and their comparative assessment for potential application in agronomy and energy production. The pyrolysis was carried out in a fixed batch reactor at 350°C and 550°C with a heating rate of 20°Cmin−1. Biochars were characterized for proximate and ultimate (elemental) analysis, and also using standard techniques (SEM, EDX, TGA, BET, XRD, and FTIR). Biochars produced at 550°C from all the feedstock had good properties (carbon content: 39.09‐80.74%, pH: 7.36‐10.42, calorific value: 16.98‐30.18 MJ kg−1, and ash content: 0.89%‐21.78%). Moreover, relatively low atomic ratios (H/C 0.25‐0.47 and O/C 0.15‐1.11) of all biochars indicated their potential as solid fuel. XRD results showed the presence of amorphous and crystalline structures, and minerals like sylivite, quartz, kalsilite, and tridymite in the biochar. Biochar produced from sugarcane bagasse at 550°C possessed the best properties: fixed carbon (77.42%), bulk density (0.13 kg/m3), brunauer–emmett–teller (BET) surface area (17.78 m2/g), pore size (12.86 nm), total pore volume (0.025 cm3/g), calorific value (30.18 MJ kg−1), ash content (1.16%), and moisture content (2.03%).

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Section: Resultssupporting

confidence: 85%

Section: Crystalline Structure and Chemical Compositionmentioning

confidence: 98%

A comparative study on synthesis and characterization of biochars derived from lignocellulosic biomass for their candidacy in agronomy and energy applications

et al. 2020

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“…For biochar, the biomass of plants first increased and then decreased with the increase of biochar content and it was higher on the 15% biochar green roof than on the 20% biochar green roof (Table 1). This might have resulted from an environmental pressure (drought stress) on the plants caused by large amounts of biochar [40]. Our results showed that the chemical properties (TN, P, and K) of 20% biochar soil were worse than those of 15% biochar soil (Table S2).…”

Section: Carbon Fixation Ability Of Green Roof Plantsmentioning

confidence: 83%

Effects of Biochar and Sludge on Carbon Storage of Urban Green Roofs

Chen

Wang

et al. 2018

Forests

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Green roofs can improve urban ecological conditions by mitigating the heat island effect and absorbing harmful gases. Soil additives can improve roof soil properties and promote the stability of the urban ecosystem. As soil additives, biochar and sludge are widely used in the ground, but their application on roofs is still scarce. This study examined the carbon storage potential of green roofs amended with sludge and biochar. The roof soil was composed of soil and varying proportions of the additives (0%, 5%, 10%, 15%, and 20%, v/v); Sedum lineare was then planted. The carbon contents of the soils and plants were measured for one year. The influence of biochar or sludge on the carbon content of the roof soil and the factors affecting the roof carbon storage potential were analyzed. The results showed that the carbon storage potential of a biochar green roof (9.3 kg C m −2) was significantly higher than that of a sludge green roof (7.9 kg C m −2). Biochar increased the carbon content of the green roof by improving the physical properties of the roof soil and promoting plant growth, whereas sludge increased the carbon content of the green roof by improving the chemical properties of the roof soil. Moreover, biochar could not only store large amounts of stable carbon, but also reduce the weight of the green roof, improve soil moisture, and provide a resourceful utilization of municipal sludge. Thus, biochar can be considered a material for promoting carbon storage on green roofs.

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“…For instance, eucalyptus green waste biochar produced at 650-750 °C had 7000 mg kg −1 Fe (Abujabhah et al 2016); whereas, willow wood waste biochar produced at 550 °C had only 0.05 mg kg −1 Fe (Agegnehu et al 2016a). Several other studies (Brantley et al 2016;Chen et al 2018;Li and Shangguan 2018;Miranda et al 2017;Noyce et al 2017) also reported that biochar contains a low but significant amount of micronutrients.…”

Section: Trace Elementsmentioning

confidence: 91%

Biochar and its importance on nutrient dynamics in soil and plant

Hossain

Bahar

Sarkar

et al. 2020

Biochar

429

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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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Biochar increases plant growth and alters microbial communities via regulating the moisture and temperature of green roof substrates

Cited by 114 publications

References 70 publications

A comparative study on synthesis and characterization of biochars derived from lignocellulosic biomass for their candidacy in agronomy and energy applications

A comparative study on synthesis and characterization of biochars derived from lignocellulosic biomass for their candidacy in agronomy and energy applications

Effects of Biochar and Sludge on Carbon Storage of Urban Green Roofs

Biochar and its importance on nutrient dynamics in soil and plant

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