Relationship between residue quality, decomposition patterns, and soil organic matter accumulation in a tropical sandy soil after 13 years

Abstract

The objectives of this study were to investigate decomposition patterns and soil organic matter (SOM) accumulation of incorporated residues (10 Mg ha -1 year -1 ) of different quality, and identify microbiological parameters sensitive to changes in SOM dynamics, in a 13-year-old field experiment on a sandy soil in Northeast Thailand. Mass loss was fastest in groundnut stover (high N), followed by rice straw (high cellulose) and tamarind (intermediate quality), and slowest in dipterocarp (high lignin and polyphenol) following a double exponential pattern. The decomposition rate k 1 (fast pool) was positively correlated with cellulose (r = 0.70*) while k 2 (slow pool) was negatively related to lignin (r = -0.85***) and polyphenol (r = -0.81

Microbiology and Macrofaunal Activity in Soil beneath Shrub Canopies during Residue Decomposition in Agroecosystems of the Sahel

“…This could be a factor in our results as polyphenolics have been shown to inhibit decomposition and N mineralization (Palm and Sanchez, 1991;Vanlauwe et al, 1996;Bernhard-Reversat, 1998;Schimel et al, 1998;Northup et al, 1998;Puttaso et al, 2011). However, microbial decomposition rate k constants had no significant differences between stem and leaf tissue or a small difference in the case of P. reticulatum placed in soil outside the influence of the shrub (Table 3).…”

Stocking Rate and Nitrogen Fertilization Affect Root Decomposition of Elephantgrass

“…Chen et al (2006) reported a decrease in root turnover with increasing SR in natural semiarid steppe. Biotic and abiotic factors are also key drivers affecting root decomposition (Vanlauwe et al, 1997; Silver and Miya, 2001; Casals et al, 2010; Puttaso et al, 2011). Gill and Jackson (2000) observed that root turnover decreased from tropical to high‐latitude systems for all plant functional groups and increased exponentially with mean annual temperature.…”

Soil organic matter and production of ears of green corn after four years under tillage systems and previous crops in costal tablelands

“…For example, after 13 years of conducting an experiment in sandy soils of Thailand, the highest decomposition rate of the soil residue was observed for those with the highest N content, followed by those with higher cellulose content and the lowest (PUTTASO et al, 2011). Among the cover crops evaluated in the present experiment, all belong to the legume group, being characterized by having a low C/N ratio.…”