Does Organic Residue Quality Influence Carbon Retention in a Tropical Sandy Soil?

The influence of residue quality on soil organic C (SOC) retention has been called into question. A field experiment in Northeast Thailand, in which contrasting quality organic residues were applied yearly for 13 yr, was used to determine quantities, locations, and stability of SOC in the soil matri...

Full description

Saved in:
Bibliographic Details
Published in:Soil Science Society of America journal 2013-05, Vol.77 (3), p.1001-1011
Main Authors: Puttaso, Aunnop, Vityakon, Patma, Rasche, Frank, Saenjan, Patcharee, Treloges, Vidhaya, Cadisch, Georg
Format: Article
Language:English
Subjects:
Arachis hypogaea
Carbon
Cellulose
Correlation
Influence
Lignin
Oryza sativa
Polyphenols
Residues
Retention
Soil (material)
Straw
Tamarind
Tamarindus indica
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The influence of residue quality on soil organic C (SOC) retention has been called into question. A field experiment in Northeast Thailand, in which contrasting quality organic residues were applied yearly for 13 yr, was used to determine quantities, locations, and stability of SOC in the soil matrix and identify residue quality parameters affecting SOC stabilization in a tropical sandy‐textured soil. Total organic C (TOC) content was highest in intermediate‐quality tamarind (Tamarindus indica L.) at 3.58 g kg−1 (intermediate N, lignin, and polyphenol contents), followed by groundnut (Arachis hypogaea L.) stover at 2.63 g kg−1 (high N), dipterocarp (Dipterocarpus tuberculatus Roxb.) at 2.63 g kg−1 (low N, high lignin and polyphenols), and rice (Oryza sativa L.) straw at 1.77 g kg−1 (high cellulose). Microaggregates (Mi) (0.053–0.25 mm) stored the highest C content (34–49% of TOC), with tamarind having the highest C content. Carbon in large macroaggregates (>2 mm), small macroaggregates (0.25–2 mm), and free organic matter (>0.053 mm) was significantly positively correlated with C, lignin, and polyphenols. Carbon in microaggregates and fine particles (
ISSN:0361-5995
1435-0661
DOI:10.2136/sssaj2012.0209