Tag Archives: biochar

Biochar – Wikipedia, the free encyclopedia

biochar in detail thanks to Biochar Project


Biochar

From Wikipedia, the free encyclopedia

Left – a nutrient-poor oxisol; right – an oxisol transformed into fertile terra preta using biochar.

Biochar is charcoal created by pyrolysis of biomass, and differs from charcoal only in the sense that its primary use is not for fuel, but for biosequestration or atmospheric carbon capture and storage.[1] Charcoal is a stable solid rich in carbon content, and thus, can be used to lock carbon in the soil. Biochar is of increasing interest because of concerns about climate change caused by emissions of carbon dioxide (CO2) and other greenhouse gases (GHG). Carbon dioxide capture also ties up large amounts of oxygen and requires energy for injection (as via carbon capture and storage), whereas the biochar process breaks into the carbon dioxide cycle[clarification needed], thus releasing oxygen as did coal formation hundreds of millions of years ago.[citation needed]

via Biochar – Wikipedia, the free encyclopedia.

Adam retort kiln thanks to Biochar Project

Australia and New Zealand Biochar Researchers Network

Special thanks to Biochar Project

What are the likely benefits of biochar?

In some soil types and with certain crop species, some biochars have been shown to:

increase water holding capacity of the soil

increase biomass (crop) production

increase soil carbon levels

increase soil pH

decrease Aluminium toxicity

decrease tensile strength

change microbiology of the soil

decrease emissions from soil of the greenhouse gases CO2, N2O and CH4

improve soil conditions for earthworm populations

increase CEC, especially over the long-term

improve fertiliser use efficiency

It should be noted that the wide variety of biochar feedstock materials, process conditions and applications leads to a huge and diverse range of responses that are often contradictory. Some biochars have been shown to have no influence on some of the factors noted above; some biochars have been shown to have adverse effects on crop productivity. More research is required to verify the observed effects and to distinguish beneficial from detrimental biochar products.

Studies thus far have shown that the greatest positive effects of biochar applications have been in highly degraded, acidic or nutrient-depleted soils. Thus, biochar research is of particular relevance in the Australian context, as many Australian soils exhibit very low nutrient and carbon levels, and are at risk of acidification.

Special thanks to Biochar Project
via Australia and New Zealand Biochar Researchers Network.