174 results for group: journal-article

Temperature dependence of basalt weathering

Gaojun Li, Jens Hartmann, Louis A.Derry, A.Joshua West, Chen-Feng You, Xiaoyong Long, Tao Zhan, Laifeng Li, Gen Li, Wenhong Qiu, Tao Li, Lianwen Liu, Yang Chen, Junfeng Ji, Liang Zhao, Jun Chen Abstract The homeostatic balance of Earth's long-term carbon cycle and the equable state of Earth's climate are maintained by negative feedbacks between the levels of atmospheric CO2 and the chemical weathering rate of silicate rocks. Though clearly demonstrated by well-controlled laboratory dissolution experiments, the temperature dependence of silicate weathering rates, hypothesized to play a central role in these weathering feedbacks, has been diffic...

Carbon Accounting for Enhanced Weathering

Thorben Amann, Jens Hartmann Abstract The inevitable deployment of negative emission technologies requires carbon accounting to incentivise the investment and to foster an active CO2 certificate trading schema. Enhanced Weathering as one of the negative emission technologies is being tested in the field now, but lacks a verifiable and cost-effective carbon accounting approach. Based on results from a lab scale column experiment and field observations, it is hypothesized that the observed stable positive correlation between total alkalinity and electrical conductivity may present a way to easily predict the initial CO2 sequestration at the ...

Enhanced weathering potentials—the role of in situ CO2 and grain size distribution

Thorben Amann, Jens Hartmann, Roland Hellmann, Elisabete Trindade Pedrosa, Aman Malik Abstract The application of rock powder on agricultural land to ameliorate soils and remove carbon dioxide (CO2) from the air by chemical weathering is still subject to many uncertainties. To elucidate the effects of grain size distribution and soil partial pressure of carbon dioxide (pCO2) levels on CO2 uptake rates, two simple column experiments were designed and filled nearly daily with an amount of water that simulates humid tropical conditions, which prevail in areas known for being hotspots of weathering. Multiple materials (dunite, basanite, agricultural ...

Second crop of corn with micaxisto remineralizer in consortium with organic fertilizer

The objective of the present work was to use the mica shale remineralizer in consortium with organic fertilizer for corn culture implanted in the Brazilian Midwest region. The experiment was carried out in the second harvest of the 2020 agricultural year, at Fazenda Panamá, Municipality of Itumbiara, state of Goiás, in the no-tillage system on soybean ridge, implemented by the Center for Study and Research in Plant Science. The location presents as coordinates geographical areas, 17 ° 58 'S latitude and 45 ° 22' W longitude and 554 m altitude. The agronomic characteristics "plant biometrics" evaluated were, the population of plants, performed ...

Physiological changes in soybean cultivated with soil remineralizer in the Cerrado under variable water regimes

Lucas Felisberto Pereira, Walter Quadros Ribeiro Junior, Maria Lucrécia Gerosa Ramos, Nicolas Zendonadi dos Santos, Guilherme Filgueiras Soares, Raphael Augusto das Chagas Noqueli Casari, Onno Muller, Cássio Jardim Tavares, Éder de Souza Martins, Uwe Rascher, Cristiane Andréa de Lima Guimarães, André Ferreira Pereira, Liliane Márcia Mertz-Henning, Carlos Antonio Ferreira de Sousa Abstract The objective of this work was to evaluate the influence of the soil remineralizer fine-graded mica schist (FMS) on soybean (Glycine max) physiology, yield, and grain quality under different water regimes (WRs) in the Brazilian Cerrado. The experiment ...

Growth and physiological responses of maize (Zea mays L.) to porous silica nanoparticles in soil

R. Suriyaprabha, G. Karunakaran, R. Yuvakkumar, P. Prabu, V. Rajendran & N. Kannan Abstract The present study aims to explore the effect of high surface area (360.85 m2 g−1) silica nanoparticles (SNPs) (20–40 nm) extracted from rice husk on the physiological and anatomical changes during maize growth in sandy loam soil at four concentrations (5–20 kg ha−1) in comparison with bulk silica (15–20 kg ha−1). The plant responses to nano and bulk silica treatments were analyzed in terms of growth characteristics, phyto compounds such as total protein, chlorophyll, and other organic compounds (gas chromatography–mass spectroscopy), and ...

Silicate rock powder: effect on selected chemical properties of a range of soils from Western Australia and on plant growth as assessed in a glasshouse experiment

P. Hinsinger, M. D. A. Bolland, R. J. Gilkes Abstract Soil samples were collected from 20 locations from the south western part of Western Australia and incubated at 25 °C for 60 days without or with finely ground granite powder at a rate of 20 g kg−1 soil, equivalent to about 20 t ha−1. Electrical conductivity and exchangeable Na, Ca and Mg were not significantly affected by granite application for most soils. Conversely, among the 20 soils studied, nine exhibited a significant increase in exchangeable K (atp

Possibilities of using silicate rock powder: An overview

Claudete GindriRamos, James C.Hower, Erika Blanco, Marcos Leandro Silva Oliveira, Suzi Huff Theodoro Abstract This study evaluates the on use of crushed rocks (remineralizers) to increase soil fertility levels and which contributed to increase agricultural productivity, recovery of degraded areas, decontamination of water, and carbon sequestration. The use of these geological materials is part of the assumptions of rock technology and, indirectly, facilitates the achievement of sustainable development goals related to soil management, climate change, and the preservation of water resources. Research over the past 50 years on silicate rocks ...

Land-based measures to mitigate climate change: Potential and feasibility by country

Stephanie Roe, Charlotte Streck, Robert Beach, Jonah Busch, Melissa Chapman, Vassilis Daioglou, Andre Deppermann, Jonathan Doelman, Jeremy Emmet-Booth, Jens Engelmann, Oliver Fricko, Chad Frischmann, Jason Funk, Giacomo Grassi, Bronson Griscom, Petr Havlik, Steef Hanssen, Florian Humpenöder, David Landholm, Guy Lomax, Johannes Lehmann, Leah Mesnildrey, Gert-Jan Nabuurs, Alexander Popp, Charlotte Rivard, Jonathan Sanderman, Brent Sohngen, Pete Smith, Elke Stehfest, Dominic Woolf, Deborah Lawrence Abstract Land- based climate mitigation measures have gained significant attention and im-portance in public and private sector climate policies. ...

The global potential for increased storage of carbon on land

Wayne S. Walker, Seth R. Gorelik , Susan C. Cook-Patton, Alessandro Baccini, Mary K. Farina, Kylen K. Solvik, Peter W. Ellis, Jon Sanderman, Richard A. Houghton, Sara M. Leavitt, Christopher R. Schwalm, Bronson W. Griscom Abstract Constraining the climate crisis requires urgent action to reduce anthropogenic emissions while simultaneously removing carbon dioxide from the atmosphere. Improved information about the maximum magnitude and spatial distribution of opportunities for additional land-based removals of CO2is needed to guide on-the-ground decision-making about where to implement climate change mitigation strategies. Here, we pre-sent a ...