228 results for group: journal-article
Enhanced weathering using basalt rock powder: carbon sequestration, co-benefits and risks in a mesocosm study with Solanum tuberosum.
Arthur Vienne, Silvia Poblador, Miguel Portillo-Estrada, Jens Hartmann, Samuel Ijiehon, Peter Wade, Sara Vicca1
Abstract
Enhanced weathering (EW) of silicate rocks can remove CO2 from the atmosphere, while potentially delivering co-benefits for agriculture (e.g. reduced nitrogen losses, increased yields). However, quantification of inorganic carbon sequestration through EW and potential risks in terms of heavy metal contamination have rarely been assessed. Here, we investigate EW in a mesocosm experiment with Solanum tuberosum growing on alkaline soil. Amendment with 50 t basalt/ha significantly increased alkalinity in soil pore water and in ...
The usefulness of the rock dust for the remediation of soils contaminated with nickel
Marek Jakubowski, Ewa Stanisławska-Glubiak, Bernard Gałka
Abstract
The purpose of this research was to examine whether the addi-tion of waste rock dust to light soil contaminated with nickel will increase the yields of cultivated plants and reduce their excessive nickel content. The research was conducted in concrete microplots of 1 m2 dimension in the complete randomisation system, as a two-factor experiment in four replications. The first factor was the level of soil contamination: (1) Ni0 – soil with natural Ni content; (2) Ni1 – 100; (3) Ni2 – 150 and (4) Ni3 – 270 mg • kg-1 of the soil. The second factor was the level of ...
Agronomic potential of four rock powders, pure or mixed, as soil remineralizers
Gabriel Octávio de Mello Cunha, Jaime antonio de Almeida
Abstract
Detailed knowledge of chemical, petrographic and mineralogical compositions as well as the effects of applying rock powder on soil chemical properties and plant production are required for classifying these materials as soil remineralizers (SR), as according to Brazilian legislation in force. This study aimed to evaluate the potential of rock powders siltstone, tephrite and olivine melilitite, pure or mixed, on improving the fertility of a Cambisol and a Nitisol as well as the yield of soybean and barley crops grown in succession inside a greenhouse. For that purpose, these ...
Application of andesite rock as a clean source of fertilizer for eucalyptus crop: Evidence of sustainability
Adilson Celimar Dalmora, Claudete Gindri Ramos, Marcos Leandro Silva Oliveir, Luis Felipe Silva Oliveir, Ivo André Homrich Schneider, Rubens MullerKautzmann
Abstract
Global demineralization of agricultural soils due to unsustainable use of highly soluble fertilizers and intensive exploitation is an issue of increasing concern. Methods of remineralization include the application of volcanic rock by-product, such as vesicular andesite on mineral-deficient fields. The present work analyzed the petrography, mineralogy, and chemistry of volcanic rock by-product (vesicular andesite rock), as well as on-field experiment with eucalyptus. The petrogra...
Evaluation of Soil Re-mineralizer from By-Product of Volcanic Rock Mining: Experimental Proof Using Black Oats and Maize Crops
Claudete Gindri Ramos, Diego dos Santos de Medeiros, Leandro Gomez, Luis Felipe Silva Oliveira, Ivo André Homrich Schneider, Rubens Muller Kautzmann
Abstract
This study was focused on physical, petrographical, mineralogical, and chemical characterization of a volcanic-rock mining by-product (dacite rock), as well as on greenhouse experiment with black oats and maize crops to evaluate the potential use of the by-product as soil re-mineralizer. The by-product sample was obtained from a quarry in the Nova Prata mining district in southern Brazil. The particle size distribution of the by-product and soil was determined by sieving. Dacite rock ...
The contribution of agricultural lime to carbon dioxide emissions in the United States: dissolution, transport, and net emissions
Tristram O.West, Allen C.McBride
Abstract
Agricultural lime (aglime) is commonly applied to soils in the eastern U.S. to increase soil pH. Aglime includes crushed limestone (CaCO3) and crushed dolomite (MgCa(CO3)2). Following the supposition by the Intergovernmental Panel on Climate Change (IPCC) that all C in aglime is eventually released as CO2 to the atmosphere, the U.S. EPA estimated that 9 Tg (Teragram = 1012 g = 106 metric tonne) CO2 was emitted from an approximate 20 Tg of applied aglime in 2001. A review of historic data on aglime production and use indicates that 30 Tg may better represent the annual U.S. consumption of aglime. More ...
Rapid Removal of Atmospheric CO2 by Urban Soils
Carla-Leanne Washbourne, Elisa Lopez-Capel, Phil Renforth, Philippa L. Ascough, and David A. C. Manning
Abstract
The measured calcium carbonate content of soils to a depth of 100 mm at a large urban development site has increased over 18 months at a rate that corresponds to the sequestration of 85 t of CO2/ha (8.5 kg of CO2 m–2) annually. This is a consequence of rapid weathering of calcium silicate and hydroxide minerals derived from the demolition of concrete structures, which releases Ca that combines with CO2 ultimately derived from the atmosphere, precipitating as calcite. Stable isotope data confirm an atmospheric origin for carbonate ...
Soil remineralization and recovery of degraded areas: An experience in the tropical region
Suzi Huff Theodoro, Fernandade Paula Medeiros, Marco Ianniruberto, Tamiel Khan Baiocchi Jacobson
Abstract
Many activities related to the expansion of food supply, energy and infrastructure result in great environmental impacts, whose most visible features are observed in the degradation of large areas. The present study demonstrates how the combined use of stonemeal technology and agroforestry systems can help to reverse such impacts, allying the recovery of degraded areas with agricultural and forest production. The study area is located in a hydroelectric reservoir affected by the siltation process and soil erosion in the hydrographic basin of ...
Review of greenhouse gas emissions from crop production systems and fertilizer management effects Author
C.S.Snyder, T.W.Bruulsema, T.L.Jensen, P.E.Fixen
Abstract
Fertilizer nitrogen (N) use is expanding globally to satisfy food, fiber, and fuel demands of a growing world population. Fertilizer consumers are being asked to improve N use efficiency through better management in their fields, to protect water resources and to minimize greenhouse gas (GHG) emissions, while sustaining soil resources and providing a healthy economy. A review of the available science on the effects of N source, rate, timing, and placement, in combination with other cropping and tillage practices, on GHG emissions was conducted. Implementation of intensive crop management ...
