scholarly journals Degree of woody encroachment into grasslands controls soil carbohydrate and amino compound changes during long term laboratory incubation

2012 ◽  
Vol 52 ◽  
pp. 23-31 ◽  
Author(s):  
Courtney A. Creamer ◽  
Timothy R. Filley ◽  
Dan C. Olk ◽  
Alain Plante ◽  
Clément Peltre ◽  
...  
Keyword(s):  
Woody Encroachment ◽  
Amino Compound ◽  
Laboratory Incubation ◽  
Soil Carbohydrate

Management effects on the dynamics and storage rates of organic matter in long-term crop rotations

2004 ◽  
Vol 84 (1) ◽  
pp. 49-61 ◽  
Author(s):  
E. A. Paul ◽  
H. P. Collins ◽  
K. Paustian ◽  
E. T. Elliott ◽  
S. Frey ◽  
...  
Keyword(s):  
Organic Matter ◽  
C Sequestration ◽  
Organic C ◽  
Soil C ◽  
Site Analysis ◽  
Laboratory Incubation ◽  
C And N ◽  
A Site ◽  
Management Effects

Factors controlling soil organic matter (SOM) dynamics in soil C sequestration and N fertility were determined from multi-site analysis of long-term, crop rotation experiments in Western Canada. Analyses included bulk density, organic and inorganic C and N, particulate organic C (POM-C) and N (POM -N), and CO2-C evolved during laboratory incubation. The POM-C and POM-N contents varied with soil type. Differences in POM-C contents between treatments at a site (δPOM-C) were related (r2= 0.68) to treatment differences in soil C (δSOC). The CO2-C, evolved during laboratory incubation, was the most sensitive indicator of management effects. The Gray Luvisol (Breton, AB) cultivated plots had a fivefold difference in CO2-C release relative to a twofold difference in soil organic carbon (SOC). Soils from cropped, Black Chernozems (Melfort and Indian Head, SK) and Dark Brown Chernozems (Lethbridge, AB) released 50 to 60% as much CO2-C as grassland soils. Differences in CO2 evolution from the treatment with the lowest SOM on a site and that of other treatments (δCO2-C) in the early stages of the incubation were correlated to δPOM-C and this pool reflects short-term SOC storage. Management for soil fertility, such as N release, may differ from management for C sequestration. Key words: Multi-site analysis, soil management, soil C and N, POM-C and N, CO2 evolution

Advanced green bioprocess of soil carbohydrate extraction from long-term conversion of forest soil to paddy field

2021 ◽  
pp. 106021
Author(s):  
Nguyen-Sy Toan ◽  
Xuefei Tan ◽  
Nguyen Thi Dong Phuong ◽  
Nurul Syahirah Mat Aron ◽  
Kit Wayne Chew ◽  
...  
Keyword(s):  
Forest Soil ◽  
Paddy Field ◽  
Soil Carbohydrate

Soil nitrous oxide emissions most sensitive to fertilization history during a laboratory incubation

2020 ◽  
Vol 100 (4) ◽  
pp. 479-487
Author(s):  
Mekonnen Giweta ◽  
Miles Dyck ◽  
Sukhdev S. Malhi ◽  
Dick Puurveen ◽  
S.A. Quideau
Keyword(s):  
Nitrous Oxide ◽  
Agricultural Soils ◽  
Nitrous Oxide Emissions ◽  
Soil Fertilization ◽  
University Of Alberta ◽  
Laboratory Incubation ◽  
Exchange Resins ◽  
The Relationship ◽  
S Fertilizers

A 12 wk laboratory incubation examined the effects of application of various nitrogen (N) and sulfur (S) fertilizers on soil plant-available nutrient levels and nitrous oxide (N2O) gas emissions with respect to soil fertilization history using soils sampled from the University of Alberta Breton Classical Plots. Fertilization history and added fertilizer treatments showed significant effects on N2O emissions and NO3−-N and SO4−-S recovered on ion-exchange resins over the 12 wk. Mean cumulative N2O emissions ranged from 0.43 to 1.18 kg N2O-N ha−1. The relationship between observed total resin-recovered NO3−-N and N2O emissions was not consistent for soils receiving long-term applications of various combinations of N, phosphorus, potassium, and S fertilizers. The N2O emission from two soils with a history of long-term N fertilizer applications but different S fertilization histories was significantly different even though resin-recovered NO3−-N levels were similar. When grouped according to added fertilizer treatments, mean cumulative N2O emissions showed a strong linear relationship with mean resin-adsorbed NO3−-N production. We hypothesize that the differences in the relationship between NO3−-N production and N2O-N emissions for soils with different long-term fertilization histories may be a result of the interaction of N and S oxidation processes. Further, soil fertilization history may significantly influence soil N2O emissions in response to N fertilizers added within the growing season of observation but isn’t often considered in short-term experiments, and this may be a significant source of uncertainty in the estimation of greenhouse gases inventories from agricultural soils.

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