A5032540122- Soil Carbon and Nitrogen Dynamics
- Bioenergy crop production and management
- Peatlands and Wetlands Ecology
- Microbial Community Ecology and Physiology
- Soil and Unsaturated Flow
- Biofuel production and bioconversion
- Soil Geostatistics and Mapping
- Plant nutrient uptake and metabolism
- Soil and Water Nutrient Dynamics
- Soil Management and Crop Yield
- Botany and Plant Ecology Studies
- Gut microbiota and health
- Agronomic Practices and Intercropping Systems
- Phosphorus and nutrient management
- Geology and Paleoclimatology Research
- Ecosystem dynamics and resilience
- Clay minerals and soil interactions
- Agriculture, Soil, Plant Science
- Anaerobic Digestion and Biogas Production
- Crop Yield and Soil Fertility
- Heavy metals in environment
- Pasture and Agricultural Systems
- Genomics and Phylogenetic Studies
- Forest Biomass Utilization and Management
- Coal and Its By-products
University of Oklahoma
2021-2025
Tennessee State University
2016-2024
Tsinghua–Berkeley Shenzhen Institute
2024
Tsinghua University
2024
Abstract Unravelling biosphere feedback mechanisms is crucial for predicting the impacts of global warming. Soil priming, an effect fresh plant-derived carbon (C) on native soil organic (SOC) decomposition, a key mechanism that could release large amounts C into atmosphere. However, climate warming priming remain elusive. Here, we show experimental accelerates by 12.7% in temperate grassland. Warming alters bacterial communities, with 38% unique active phylotypes detected under The...
Global soil organic carbon (SOC) stocks may decline with a warmer climate. However, model projections of changes in SOC due to climate warming depend on microbially-driven processes that are usually parameterized based laboratory incubations. To assess how lab-scale incubation datasets inform over decades, we optimized five microbially-relevant parameters the Microbial-ENzyme Decomposition (MEND) using 16 short-term glucose (6-day), cellulose (30-day) and long-term (729-day) soils from...
Abstract The mechanistic understanding of warming and nitrogen (N) fertilization, alone or in combination, on microbially mediated decomposition is limited. In this study, soil samples were collected from previously harvested switchgrass ( Panicum virgatum L.) plots that had been treated with high N fertilizer HN : 67 kg ha −1 ) those received no NN over a 3‐year period. incubated for 180 days at 15 °C 20 °C, during which heterotrophic respiration, δ 13 C CO 2 , microbial biomass MB ),...
The effects of intensive nitrogen (N) fertilizations on spatial distributions soil microbes in bioenergy croplands remain unknown. To quantify N fertilization effect heterogeneity microbial biomass carbon (MBC) and (MBN), we sampled top mineral horizon soils (0-15 cm) using a spatially explicit design within two 15-m2 plots under three treatments three-year long experiment Middle Tennessee, USA. were no input (NN), low (LN: 84 kg ha-1 urea) high (HN: 168 urea). crops switchgrass (SG: Panicum...
Abstract Nitrogen (N) fertilizers can potentially alter spatial distribution of soil organic carbon (SOC) and total nitrogen (TN) concentrations in croplands such as switchgrass (SG: Panicum virgatum L.) gamagrass (GG: Tripsacum dactyloides L.), but it remains unclear whether these effects are the same between crops under different rates fertilization. 13 C 15 N two important proxy measures biogeochemistry, they were rarely examined to their distributions soil. Based on a three-year long...
Abstract Global warming modulates soil respiration (RS) via microbial decomposition, which is seasonally dependent. Yet, the magnitude and direction of this modulation remain unclear, partly owing to lack knowledge on how microorganisms respond seasonal changes. Here, we investigated temporal dynamics communities over 12 consecutive months under experimental in a tallgrass prairie ecosystem. The interplay between time altered (P < 0.05) taxonomic functional compositions communities....
Abstract Nitrogen (N) fertilization significantly affects soil extracellular oxidases, agents responsible for decomposition of slow turnover and recalcitrant organic carbon (SOC; e.g., lignin), consequently influences sequestration capacity. However, it remains unclear how oxidases mediate SOC under N fertilization, whether these effects co‐vary with plant type (e.g., bioenergy crop species). Using a spatially explicit design intensive sampling strategy three treatments in switchgrass (SG:...
Abstract Background Soil moisture, pH, dissolved organic carbon and nitrogen (DOC, DON) are important soil biogeochemical properties in switchgrass (SG) gamagrass (GG) croplands. Yet their spatiotemporal patterns under (N) fertilization have not been studied. Aims The objective of this study is to investigate the main interactive effects N bioenergy crop type on central tendencies spatial heterogeneity DOC DON. Methods Based a 3‐year long experiment Middle Tennessee, USA, 288 samples top...
Nitrogen (N) fertilization affects bioenergy crop growth and productivity consequently carbon (C) N contents in soil, it however remains unclear whether type individually or interactively influence soil organic (SOC) total (TN). In a three-year long experiment switchgrass (SG: Panicum virgatum L.) gamagrass (GG: Tripsacum dactyloides croplands Middle Tennessee USA, samples (0–15cm) were collected plots with no input (NN), low (LN: 84 kg ha-1 yr-1 urea) high (HN: 168 urea). Besides SOC TN,...
Abstract Extracellular glycosidases in soil, produced by microorganisms, act as major agents for decomposing labile soil organic carbon (e.g., cellulose). Soil extracellular are significantly affected nitrogen (N) fertilization but effects on spatial distributions of have not been well addressed. Whether the N vary with bioenergy crop species also remains unclear. Based a 3-year experiment Middle Tennessee, USA, total 288 samples topsoil (0–15 cm) were collected from two 15 m 2 plots under...
Precipitation changes altered soil heterotrophic respiration, but the underlying microbial mechanisms remain rarely studied. This study conducted three-year switchgrass (Panicum virgatum L.) mesocosm experiment to investigate respiratory responses precipitation. Five treatments were considered, including ambient precipitation (P0), two wet (P+33 and P+50: 33% 50% enhancement relative P0), drought (P-33 P-50: reduction P0). The plant's aboveground biomass (AGB), organic carbon (SOC), total...
Earth and Space Science Open Archive Presented WorkOpen AccessYou are viewing the latest version by default [v1]Multi-year incubation experiments boost confidence in model projections of long-term soil carbon dynamicsAuthorsJianweiLiiDSiyangJianGangshengWangiDLaurelKluberChristopherSchadtJunyiLiangMelanieMayesiDSee all authors Jianwei LiiDCorresponding AuthorTennessee State UniversityiDhttps://orcid.org/0000-0002-0429-3627view email addressThe was not providedcopy addressSiyang JianTennessee...
Abstract Incorporating microbial processes into soil biogeochemical models has received growing interest. However, determining the parameters that govern microbially driven typically requires case‐specific model calibration in various and ecosystem types. Here each case refers to an independent individual experimental unit subjected repeated measurements. Using Microbial‐ENzyme Decomposition model, this study aimed test whether a common set of microbially‐relevant (i.e., generalized...
The effects of organic and conventional production systems on crop productivity have been greatly explored, but their soil microbial processes were often neglected. A comparative field study was conducted at the Tennessee State University research farm to determine heterotrophic respiration biomass carbon. Leafy green vegetables grown in a system an open field, they system, using three different row covers (agribon cloth, insect net, plastic), field. Soil samples (0-15cm) collected from two...
The study of warming impact on soils requires a realistic and accurate representation temperature. In laboratory incubation studies, widely adopted method has been to render constant temperatures in multiple chambers, via comparisons soil responses between low- high-temperature derive the changes. However, this commonly used failed imitate both magnitude amplitude actual as observed field conditions, thus potentially undermining validity such studies. With sophisticated environmental...
The study of warming impact on soils requires a realistic and accurate representation temperature. In laboratory incubation studies, widely adopted method has been to render constant temperatures in multiple chambers, via comparisons soil responses between low- high-temperature derive the changes. However, this commonly used failed imitate both magnitude amplitude actual as observed field conditions, thus potentially undermining validity such studies. With sophisticated environmental...