A5028139975- Soil Carbon and Nitrogen Dynamics
- Soil and Unsaturated Flow
- Clay minerals and soil interactions
- Thermochemical Biomass Conversion Processes
- Geochemistry and Geologic Mapping
- Peatlands and Wetlands Ecology
- Atmospheric and Environmental Gas Dynamics
- Soil erosion and sediment transport
- Coal and Its By-products
- Soil and Water Nutrient Dynamics
- Agricultural Science and Fertilization
- Agronomic Practices and Intercropping Systems
- Landfill Environmental Impact Studies
- Soil Geostatistics and Mapping
- Crop Yield and Soil Fertility
- Climate change and permafrost
- Geology and Paleoclimatology Research
- Plant nutrient uptake and metabolism
- Composting and Vermicomposting Techniques
- Meat and Animal Product Quality
- Agroforestry and silvopastoral systems
- Polar Research and Ecology
- Microbial Metabolites in Food Biotechnology
- Polymer-Based Agricultural Enhancements
- Seedling growth and survival studies
University of Concepción
2011-2024
Universidad de Santiago de Chile
2021
Universidad de La Frontera
2006-2008
The objective of this study was to evaluate the individual and synergic effects application Biochar (B), Humic Substances (HS), Gypsum (G) on soil properties a saline–sodic soil, plant growth seed quality (polyphenols, protein yield) quinoa. Treatments included (B) 22 t ha−1, (HS) 5 kg 47.7 ha−1. Two quinoa genotypes from Arid Zones (AZ-51 AZ-103) were selected established in eight treatments. B + HS G combined treatment resulted increases root biomass 206% 176% AZ-51 AZ-103, respectively....
Farm and industrial residues must be adequately managed to avoid negative environmental implications. In this study, our objective was evaluate (i) the impact of co-production vermicompost using grape bagasse biochar (BC) on yield biochemical, chemical, biological properties vermicompost; (ii) effect BC earthworms (Eisenia fetida Sav.). The co-produced over 5 months (n = 4 per treatment) as substrate, Sav.), (iii) three BCs (eucalyptus sawdust BC, pig manure carbonaceous material from...
Summary The ‘Espinal’ agroforestry system of the Mediterranean zone central Chile, which covers an area 2000 000 ha, is in various stages degradation due to human activities. objective our study was: (i) determine effects canopy cover Acacia caven (‘Espino’) on total soil organic carbon (SOC), respiration and labile components matter (microbial biomass, light fraction); (ii) influence ecosystem SOC. Soils are classified as fine, mixed, active, mesic Ultic Palexeralfs, typical...
Although the maritime Antarctic has undergone rapid warming, effects on indigenous soil-inhabiting microorganisms are not well known. Passive warming experiments using open-top chamber (OTC) have been performed Fildes Peninsula in since 2008. When soil temperature was measured at a depth of 2-5 cm during 2013-2015 summer seasons, mean inside OTC (OTC-In) increased by approximately 0.8 °C compared with outside (OTC-Out), while chemical and physical characteristics did change. Soils (2015...
The decomposition of organic wastes contributes to greenhouse gas (GHG) emissions and global warming. This study evaluated the effect biochar (BC) produced from different farm (chicken, pig cow manures) on soil chemical biological properties in grassland soils (volcanic non-volcanic soils). A 288-day laboratory experiment was carried out, monitoring CO2, N2O CH4 evaluating total C, pH, microbial biomass enzymatic activity three soils. results varied depending type feedstock BC produced....
Abstract Available soil N can be lost through ammonia volatilization, nitrate leaching to surface and ground waters, nitrous oxide emission under intensive systems of agricultural production. Research has shown that phenolic compounds isolated from certain plants influence cycling in soils, which results a decrease losses represents key issue for environmental protection worldwide. In this study, water-soluble ethanol-soluble were extracted the leaves, bark roots tree shrub species...
Global warming affects the carbon (C) pools in terrestrial ecosystems, accelerating biological processes that feed back into phenomenon of climate change.Globally, grassland ecosystems accumulate large quantities organic C soils and are considered a corner stone for global mitigation.The aim this study was to evaluate temperature sensitivity decomposition different soil aggregate fractions across north-south latitudinal gradient Chile.Soil samples were collected from Mediterranean semi-arid...
Abstract Soils can act as either sinks or source of greenhouse gas (GHG) depending on how flows are affected by management practices, but limited information is available volcanic soils. This study aimed to examine the physical protection C and GHG emissions provided soil macroaggregates in a cultivated under no-till different N fertilization liming additions. A long-term experiment system was used. Studied plots had been fertilized annually from 1996 present with four treatments: nitrate...
The use of organic waste in agricultural soil can enhance crop yields, improve management, and boost carbon (C) sequestration. However, more field data are required to fully understand the impacts pyrolyzed unpyrolyzed animal manures. objectives this study were (i) analyze impact two manures on properties, C storage, clover productivity (ii) examine biochar’s movement through profile. Poultry litter (PL), dairy manure (DM), poultry biochar (PLBC), (DBC) applied at rates 8 t ha−1 a experiment...
Abstract Unsustainable management of the "Espinal" agroecosystem central Chile has progressively lowered organic matter content and fertility soil as evidenced by decreasing forage production lower coverage espino (Acacia caven (Mol.) Mol.), a leguminous tree. This savannah-type ecosystem includes Cauquenes clay loam (Ultic Palexeralfs; Umbric Acrisols) that formed in granitic residuum, Mediterranean-type climate having extended dry periods during warmer months (November through March)....
Chile has different types of soil and climate conditions that favor a wide range agricultural activities can generate potential atmospheric contamination like greenhouse gases (GHG).Nevertheless, the contribution soils to emissions yet be measured in Chile.The aim this study was assess seasonal variability CO2 N2O effluxes situ from volcanic ash-derived under agronomic management practices.Gas samples were obtained headspaces non-fixed closed chambers an annual crop rotation no-till system...
Carbon dynamics Partial least-squares regression Random forestThe role of soil in the global carbon cycle and carbon-climate feedback mechanisms has attracted considerable interest recent decades.Consequently, development simple, rapid, inexpensive methods to support studies on is interest.Near-infrared spectroscopy (NIRS) emerged as a rapid cost-effective method for measurements properties.The aim this study was develop validate predictive model δ 13 C values using NIRS various profiles...
Abstract. One of the critical aspects in modelling soil organic carbon (SOC) predictions is lack access to information which usually concentrated regions high agricultural interest. In Chile, most and SOC data date highly 25 % territory that has intensive or forestry use. Vast areas beyond those forms land use have few no available. Here, we present a new database for country, result an unprecedented national effort under frame Global Soil Partnership help build largest on Chile named...
The soil chamber technique is most commonly used for measuring gas exchange between surfaces and the atmosphere, to understand regulatory processes relevant determine greenhouse (GHG) emissions from soils improve inventory of agricultural systems.The chambers are inserted into avoid lateral diffusion gases.However, disturbance caused by insertion causes in degassing can result erroneous flux data measurements made immediately following insertion.Here we assess effect associated with on...
The global use of nitrogen (N) fertilizer has increased 10-fold in the last fifty years, resulting N losses via nitrate leaching to groundwater bodies or from gaseous emissions atmosphere. One biggest problems farmers face agricultural production systems is loss N. In this context, novel biological nitrification inhibitors (BNI) using biochar (BC) as a renewable matrix increase efficiency, by reducing rates, have been evaluated. chemical and morphological characteristics BC were analyzed...
Abstract Soil organic carbon (SOC) plays a key role in crop productivity and soil quality. Conservation agriculture has positive effect on SOC accumulation the surface horizons, but little information is available regarding of removal residues by burning. This study aimed to assess impact different types residue management practices total C distribution natural abundance 13C (‰, δ13C). Two volcanic soils, located Mediterranean temperate zone Southern Chile, were studied: an Ultisol...