Exciting new published results (the first of many!) from this project: biochar effects on soil fertility (physical and chemical properties). Please find the abstract that follows:
A body of emerging research shows the promise of charcoal soil amendments (“biochars”) in restoring fertility in degraded agricultural and forest soils. “Sustainable biochars” derived from locally produced waste biomass and produced near the application site are of particular interest. We tested the effects of surface applications of wood-derived biochars (applied at 7.5 t·ha−1) on soil physiochemical properties (N, P, K, pH, soil moisture content, organic matter content, and bulk density) in three land-use types: agriculture (Camellia sinensis monoculture), agroforestry (C. sinensis with shade trees), and secondary forest (Dipterocarpus dominated) assessed over seven months. We found significant positive effects of biochar on soil physiochemical properties in all land-use types, with the strongest responses in the most degraded tea monoculture sites. Although biochar had no significant effect on soil N and K, it improved soil P—the primary nutrient most commonly limiting in tropical soils. Biochar also enhanced soil moisture and organic matter content, reduced bulk density, and increased soil pH in monoculture sites. Our results support the general hypothesis that biochar can improve the fertility of degraded soils in agricultural and forest systems in Bangladesh and suggest that biochar additions may be of great benefit to the most degraded soils.
Biochar Effects on Soil Physiochemical Properties in Degraded Managed Ecosystems in Northeastern Bangladesh
MR. Karim, Md.Abdul Halim, NV Gale, SC Thomas
About This Project
“Biochar”, or charcoal used as a soil amendment, has been recently heralded in its ability to improve poor soil conditions such as leaching, acidification, and contamination, while directly mitigating climate change by increasing carbon sequestration. We plan to combat climate change using biochar in beautiful Bangladesh, a delta country vulnerable to climate change. We strive to increase productivity across land-use types: primary forests, secondary forests, agroforestry, and agriculture.
Ask the ScientistsJoin The Discussion
What is the context of this research?
Significant plant responses to biochar have been observed in many agricultural studies, with typical biomass increases of 10 – 25%. However, the potential of biochar to enhance plant growth and productivity in the context of forestry and agroforestry is underexplored. A recently published review, and results from a nursery experiment in Bangladesh show larger growth responses for trees, with an average responses of around 40%.
We want to expand on these findings by setting up long-term field plots with biochar amendments across different land use types. We will measure physiological traits responsible for performance and resource use to help determine the mechanisms responsible for growth effects. We will also measure soil fluxes of methane and carbon dioxide, two potent greenhouse gases.
What is the significance of this project?
Combating climate change is everyone’s responsibility. Many western nations are only beginning to notice small effects of climate change, whereas in Bangladesh the impacts are severe and daily: flooding, extreme heat and drought, powerful storms, and salinity intrusion. Biochar is a climate change mitigation technology with great promise, supported by hundreds of studies that document increased system productivity with an overall net negative carbon impact. This project represents the chance to fight climate change on the front lines.
This work will additionally fill the current knowledge gaps in our understanding of plant responses to biochar by describing plant physiological responses, and in our understanding of tropical soil greenhouse gas fluxes .
What are the goals of the project?
- Set up 20 x 20 m plots across 4 important land-use types: primary forest, secondary forest, agroforestry, and agriculture, at Khadimnagar National Park in Sylhet, Bangladesh. Three replicate plots of control (no biochar) and biochar applied at 10 t / ha (locally, indigenously produced) will be used for each land-use type. (April - May)
- Install soil nutrient resin- exchange root simulator probes.
- Train students and assistants on instrumentation and scientific techniques.
- Measure “early” plant growth and physiological responses, greenhouse gas fluxes, and soil nutrient availability. (May)
- Give lectures and community workshops highlighting traditional and other low-tech methods to produce biochar from organic waste materials and explaining its potential benefits.
The funding requested covers a portion of the total projected project costs (> $5000) - we are also applying for several other grants, but these are not guaranteed, and these funds will be awarded later than needed. The amount requested is the very minimum necessary to initiate this project.
A critical component of this project is purchasing biochar made by the Khashia. This biochar is made through traditional “pit-and-mound” methods and is the same currently in use in the region.
Power in Bangladesh is unreliable, so a gas generator will be used to power equipment and charge batteries. We will need to purchase gasoline for the generator.
We plan to fly to Dhaka and initiate this project in April - May.
We would like to hire students from surrounding universities, and local inhabitants, to assist us in implementing these plots. We'll need to transport char and use GPS to map plots. We'd also like to add more plots which means purchasing more char!
Meet the Team
I'm currently pursuing a PhD with Sean Thomas at the University of Toronto, Faculty of Forestry investigating plant growth and physiological responses to biochar in temperate, boreal, and tropical systems.
Serious curiosity and inquiry on the nature of plants began very early in the garden. Much time was additionally spent in Ontario's temperate mixed-wood forests and woodlots. Silviculture was implemented as a means to heat the house, and the forest served as a brilliant recreational space.
As a "grown-up" I'd describe myself as a curious plant and forest ecologist. I'm pre-occupied with fighting climate change and restoring industrialised landscapes.
Md. Abdul Halim
I have been working as an Assistant Professor at the Department of Forestry and Environmental Science, Shahjalal University of Science and Technology, Bangladesh. Currently I am on study leave and pursuing my PhD with Dr. Sean Thomas at Faculty of Forestry, University of Toronto, Canada.
My current research mainly addresses how disturbances in the boreal forest affect the biogeophysical and biogeochemical forcings of climate. I am also interested in biochar-base ecosystem restoration and climate change mitigation approach. I am experienced on working with different aspects of tropical forest ecology and management.
I always felt I have a lot of duty towards nature and people. I found generating knowledge is the most fascinating way to help them while being myself happy!
Driven by a curiosity about ecosystems and concern for our planet, I have been an active researcher on forest carbon processes and the comparative biology of trees for some 25 years. Recently my lab has taken a turn to the “dark side” of forest ecology – namely the study of charcoal in forest soils, either added as an amendment (“biochar”) or input through natural fires. My research group is particularly interested in char properties, distribution, their impacts on soil organisms, processes, and forest productivity, and the use of chars in forest restoration. I've worked extensively in developing countries ranging from SE Asia to Africa and Latin America.
The benefits of "backing"
everyone: post card from Bangladesh with a photo from the field with team members
$40: We love tea. We'll send you tea from the best plantations in the world, Sylhet, Bangladesh, conveniently located near our field sites. We'll include a steeper too.
$75: We'll name an experimental plot after you! Each plot will have a sign erected: imagine your name on one! That way everyone will know you are fighting climate change.
$100: We'll send you tea, name a plot after you, and also send you a hard-copy "experimental-log" of our research, findings, and adventures!
- $4,052Total Donations
- $79.45Average Donation