Amending greenroof soil with biochar to affect runoff water quantity and quality

Beck, Deborah A.; Johnson, Gerald R.; Spolek, Graig A.

doi:10.1016/j.envpol.2011.01.022

Cited by 223 publications

(110 citation statements)

References 19 publications

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“…At low amendment (1-5%) or substitution (< 25%) rates, BC has been found to maintain or improve plant growth as a result of increased nutrient availability (Headlee et al, 2014), reduced nutrient and water loss (Altland and Locke, 2013;Beck et al, 2011;Graber et al, 2010), and amelioration of peat acidity (Bedussi et al, 2015), though these effects may be BC-specific due to feedstock and pyrolysis influences on BC properties (McBeath et al, 2015;Zhao et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Substitution of peat moss with softwood biochar for soil-free marigold growth

Margenot

Griffin

Alves

et al. 2018

Industrial Crops and Products

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A B S T R A C TPeat moss has historically been a key component of soil-free substrates in the greenhouse and nursery industries. However, the increasing expense of peat, negative impacts of peat mining on wetland ecosystems, and growing perception of peat as unsustainable have led to investigation for alternatives. Biochar (BC) is a promising substitute for peat, yet the majority of studies examine additions of BC to peat-based substrates rather than replacing the peat component or employ relatively low substitution rates. Furthermore, at high substitution rates the alkalinity common to many BCs may increase substrate pH and adversely impact plant production. We evaluated BC substitution for peat and pH adjustment of resulting substrates on marigold (Tagetes erecta L.) performance under standard greenhouse conditions. A high pH (10.9) softwood BC (800°C) was substituted for peat in a standard 70:30 (v/v) peat:perlite mixture at 10% total volume increments. Substrate pH was either not adjusted or adjusted to pH 5.8 using a BC by-product, pyroligneous acid (PLA). Germination was inhibited in pH adjusted substrates with high BC substitution (50-70% total substrate volume) likely due to higher dosages of PLA needed to neutralize pH. At harvest (flowering stage, 9 weeks) the initial pH gradient (4.4-10.4) in substrates that were not pH adjusted had converged to pH 5.6-7.5, and BC substitution for peat did not negatively impact marigold biomass or flowering. At low substitution rates (10-30% total substrate volume), marigold biomass and leaf SPAD values were greater than the control peat-perlite mixture (0% BC). This study demonstrates that softwood BC can be considered as a full replacement for peat in soil-free substrates, and even at high rates (70% total substrate volume) does not require pH adjustment for marigold production. Crop-and BC-specific considerations and economic potential should be investigated for wider application.

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Section: Introductionmentioning

confidence: 99%

Substitution of peat moss with softwood biochar for soil-free marigold growth

Margenot

Griffin

Alves

et al. 2018

Industrial Crops and Products

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“…Substrate material (depth and physical properties, particularly water holding capacity) is essential for the survival of plants, especially in hot and dry climates [21,22]. Beck et al [7] stated that there is a need to find a balance between providing sufficient nutrients for plant growth and simultaneously reducing the leaching of nutrients in the runoff. One of the solutions is to use a soil amendment which is able to decrease the concentrations of released phosphate from the substrate [7].…”

Section: Introductionmentioning

confidence: 99%

“…Beck et al [7] stated that there is a need to find a balance between providing sufficient nutrients for plant growth and simultaneously reducing the leaching of nutrients in the runoff. One of the solutions is to use a soil amendment which is able to decrease the concentrations of released phosphate from the substrate [7]. The alternative option is to underline the substrate with P-reactive material.…”

Section: Introductionmentioning

confidence: 99%

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Effect of P-Reactive Drainage Aggregates on Green Roof Runoff Quality

Karczmarczyk

Baryła

Bus

2014

Water

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Abstract:The main hypothesis of the presented study is that the negative effect of phosphorus leaching from a green roof substrate can be reduced by including P-reactive material in a drainage layer. In this work, different aggregates (Pollytag ® , lightweight expanded clay aggregates, chalcedony, serpentynite and crushed autoclaved aerated concrete) to be used as the green roof drainage layer are described. Physical parameters, e.g., granulometric composition, water absorption, bulk density and porosity are assessed. A phosphorus sorption isotherm and a kinetic test were performed. Physical and chemical characteristics of the materials were used as a base for choosing the best media for the drainage layer. The P-removal efficiency of crushed autoclaved aerated concrete was confirmed in a column experiment. Adding the implementation of the P-reactive material in a drainage layer during construction can reduce the negative effect of substrate on green roof runoff quality.

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“…In the storm water runoff the type of substrate and depth (shown table-5) participate most considerable role in green roofs [Stovin et al,2012] [17] .In general the grass species can play very significant role at decreasing of water runoff [1].Ayako and Nigel et al ,2011 investigated that bare soil can absorbs more water comparative to vegetation species roofs .Sedum species is just exception [15]. Due to storm water runoff the amount of nutrients in green roofs decreases.…”

Section: Substratementioning

confidence: 99%

The Performance of Green Roof With Storm Rainwater Runoff

2017

IJAERD

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Amending greenroof soil with biochar to affect runoff water quantity and quality

Cited by 223 publications

References 19 publications

Substitution of peat moss with softwood biochar for soil-free marigold growth

Substitution of peat moss with softwood biochar for soil-free marigold growth

Effect of P-Reactive Drainage Aggregates on Green Roof Runoff Quality

The Performance of Green Roof With Storm Rainwater Runoff

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