Improved model simulation of soil carbon cycling by representing the microbially derived organic carbon pool

2021 ◽  
Author(s):  
Xianlei Fan ◽  
Decai Gao ◽  
Chunhong Zhao ◽  
Chao Wang ◽  
Ying Qu ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Carbon ◽  
Carbon Cycling ◽  
Model Simulation ◽  
Carbon Pool ◽  
Soil Carbon Cycling ◽  
Organic Carbon Pool ◽  
Improved Model

Relative Contribution of aggregated soil Carbon to soil organic carbon pool in an Ultisol, SouthEastern Nigeria

2020 ◽  
Author(s):  
Akudo Ogechukwu Onunwa ◽  
Ifeyinwa Monica Uzoh ◽  
Chukwuebuka Christopher Okolo ◽  
Charles Arinze Igwe ◽  
John Nwite
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Carbon ◽  
Organic Amendments ◽  
Aggregate Size ◽  
Cropping System ◽  
Carbon Pool ◽  
Relative Contribution ◽  
Split Plot ◽  
Organic Carbon Pool

<p> </p><p>                                                                        <strong>ABSTRACT</strong></p><p>Maintenance of Soil Organic Matter (SOM) has been recognized as a strategy that could reduce soil degradation, improve soil organic carbon (SOC) pool thereby reducing atmospheric concentration of carbon iv oxide (CO<sub>2</sub>) so as to ameliorate the effect of carbon and other greenhouse gases on the environment. Soil fertility depletion in the humid tropics is a serious problem emanating from erosion and leaching due to intense rainfall. Decrease in soil fertility and productivity is believed to be due to depletion in SOM. This study aims at determining the relative contributions (RC) of the various aggregated soil carbon (C<sub>WSA</sub>) (which is a function of available organic matter in the soil) to Soil organic carbon pool. Soil samples were collected from an area of land (0.1125ha) planted to sole cowpea, sole maize and maize-cowpea intercrop in No till (NT) and conventionally tilled (CT) plots amended with poultry droppings (PD), pig waste (PW), cassava peels (CP) at 20t/ha each and a control in a split-split plot in Randomized Complete Block Design with three replicates. Cropping system was assigned to the main plots, tillage system was assigned to split plot while organic amendments and control was assigned to the split-split plot measuring 7.5m<sup>2</sup>. The same treatment was maintained for two planting seasons (2012 and 2013), with the residual taken in 2013. Soil samples were collected at 0-30cm at the end of each planting season and SOC of the whole soil and the aggregated  soil carbon (2mm, 2-1mm,1-0.5mm 0.5-0.25mm and < 0.25mm) were determined using Walkley  and Black method as described by Nelson and Sommers (1982). Data collected were subjected to Analysis of Variance (ANOVA) using Genstat release 7.22D. The result revealed that there is a trend of aggregate size fractions 1-0.25mm contributing more carbon to the SOC than aggregate size fractions >2-1mm irrespective of the cropping system, tillage method or organic amendments applied. The highest relative contribution of aggregated soil carbon to the SOC pool shifted from the micro-aggregates (<0.25mm) to the macro-aggregates (1.0-0.25mm) for as long as the organic amendments lasted but gradually returned to the micro-aggregates when the amendments were withdrawn. It is therefore recommended that organic amendments be use to improve the soil aggregation which goes a long way in improving soil carbon pool thereby ameliorating the effect of carbon and other green house gases on the environment.</p><p>Key Words: Soil Organic carbon pool, Soil Aggregated carbon, Relative Contribution, Macro and Micro Aggregates</p>

Soil organic carbon pool under selected tree plantations in the Southern Western Ghats of Kerala, India

2021 ◽  
Vol 62 (1) ◽  
pp. 126-138
Author(s):  
Vijo Thomas Kurien ◽  
Elvin Thomas ◽  
S. Prasanth Narayanan ◽  
A. P. Thomas
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Western Ghats ◽  
Carbon Pool ◽  
Tree Plantations ◽  
Southern Western Ghats ◽  
Organic Carbon Pool

Effects of forest fragmentation on organic carbon pool densities in the Mongolian forest-steppe

2019 ◽  
Vol 433 ◽  
pp. 780-788 ◽  
Author(s):  
Choimaa Dulamsuren ◽  
Michael Klinge ◽  
Banzragch Bat-Enerel ◽  
Tumurbaatar Ariunbaatar ◽  
Daramragchaa Tuya
Keyword(s):  
Organic Carbon ◽  
Forest Fragmentation ◽  
Carbon Pool ◽  
Forest Steppe ◽  
Organic Carbon Pool

Soil organic carbon pool along different altitudinal level in the Sygera Mountains, Tibetan Plateau

2016 ◽  
Vol 13 (3) ◽  
pp. 476-483 ◽  
Author(s):  
He-ping Ma ◽  
Xiao-lin Yang ◽  
Qi-qiang Guo ◽  
Xin-jun Zhang ◽  
Chen-ni Zhou
Keyword(s):  
Tibetan Plateau ◽  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Carbon Pool ◽  
Organic Carbon Pool

Geologic controls of soil carbon cycling and microbial dynamics in temperate conifer forests

2009 ◽  
Vol 267 (1-2) ◽  
pp. 12-23 ◽  
Author(s):  
Katherine Heckman ◽  
Amy Welty-Bernard ◽  
Craig Rasmussen ◽  
Egbert Schwartz
Keyword(s):  
Soil Carbon ◽  
Carbon Cycling ◽  
Conifer Forests ◽  
Microbial Dynamics ◽  
Soil Carbon Cycling ◽  
Geologic Controls
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