Carbon and nitrogen mineralization dynamics in different soils of the tropics amended with legume residues and contrasting soil moisture contents

Abera, Girma; Wolde-meskel, Endalkachew; Bakken, Lars R.

doi:10.1007/s00374-011-0607-8

Cited by 95 publications

(60 citation statements)

References 50 publications

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“…This suggested that the rapid breakdown of labile substrates such as organic acids, amino acids, and simple sugars in the first few weeks of residue addition was followed by a gradual decrease in SOC mineralization in the later weeks. These results agreed with previous studies [31][32][33] and suggested that labile organic matter decomposed rapidly and produced a large flux of CO 2 in the first few weeks of incubation [34]. The recalcitrant fraction of SOC such as lignin, cellulose, etc.…”

Section: Discussionsupporting

confidence: 82%

Cover Crop Residue Amount and Quality Effects on Soil Organic Carbon Mineralization

Ghimire

VanLeeuwen

et al. 2017

Sustainability

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Decline in soil organic carbon (SOC) and the associated impacts on crop production under conventional farming raises concerns on how alternative management practices increase SOC sequestration and improve agricultural sustainability. This study aimed to understand SOC mineralization kinetics with different cover crop (CC) residue amendments. Soil samples were collected from a fallow and three CC (pea, oat, and canola) plots. Soil samples from the CC plots were manipulated with zero, five, and 10 Mg ha −1 of the respective CC residues. All soil samples were incubated for eight weeks, SOC mineralization was monitored, and the first order kinetic and parabolic equation models were fitted to the observed data for estimating labile SOC (C 0 ), and the decomposition rate constant (k). Subsequent comparisons of fitted model parameters were based on the first order kinetic model. The C 0 varied with the residue amount while k varied with CC type. C 0 was 591-858% greater with 10 Mg ha −1 and 289-456% greater with five Mg ha −1 residue additions while k was 122-297% greater with 10 Mg ha −1 and 94-240% greater with five Mg ha −1 residue additions when compared to the fallow treatment. The CC residue stimulated cumulative carbon mineralization (C min ) irrespective of CC type, suggesting that cover cropping has potential to improve SOC cycling in agroecosystems.

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Section: Discussionsupporting

confidence: 82%

Cover Crop Residue Amount and Quality Effects on Soil Organic Carbon Mineralization

Ghimire

VanLeeuwen

et al. 2017

Sustainability

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“…Sholihah et al (2012) reported that mineralization rate has correlation to C:N ratio (0.582*). Organic matter with low C:N ratio has higher mineralization rate compared to organic matter with high C:N ratio (Abera et al, 2012). A similar pattern is found for N potential observation.…”

Section: Resultssupporting

confidence: 68%

Comparison of two kinetics models for estimating N mineralization affected by different quality of organic matter in Typic Hapludults

Wijanarko

Purwanto

2016

J.Degrade.Min.Land Manage.

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N availability in the soil is determined by the rate of mineralization. N mineralization can be estimated using several models. Aim of research is to compare of two kinetics models for estimating N mineralization affected by different inputs of organic matter and soil fertility in Typic Hapludults. Research used completely randomized design with two factors. The first factor was land use : (1). Soil from land cultivated by cassava crops for less than 10 years, and (2). Soil from land cultivated by cassava crops for more than 30 years. The second factor was type of organic matter: (1). Groundnut biomass, (2). Maize biomass, (3). Groundnut-maize biomass, with ratio of 1:1, (4). Groundnut -maize biomass, with ratio of 2:1, (5). Groundnut -maize biomass, with ratio of 1:2, and (6). Without organic matter. The result shows that based on the value of R 2 , first-order kinetics equation is more suitable to decribe N mineralization than double-pool kinetics equation because R-square value higher than double-pool kinetics and is positively correlated with N mineralization parameters (N0, k and N0.k).

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“…Furthermore, ploughing (T2 and T3) reduced SOM content and EC at 0-5 cm depth, and slightly increased soil pH at 0-5 cm as well as at 10-15 cm depth (Table 2). According to the thresholds of Dermott [23] and Mariscal-Sancho et al [20], the dispersion ratio measurements under T2 and T3 at 0-5 cm depth indicated very stable aggregates (dispersion ratio < 5) and were smaller than under T0 and T1. In contrast, the water stable aggregates percentage was higher in T0 and T1 than in ploughed treatments.…”

Section: Tillage and Organic Residue Experimentsmentioning

confidence: 99%

Influence of Tillage Practices, Organic Manures and Extrinsic Factors on β-Glucosidase Activity: The Final Step of Cellulose Hydrolysis

2018

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β-glucosidase is a key enzyme in the C-cycle, and its activity is strongly influenced by soil management practices and by extrinsic factors such as weather conditions. However, the variability of β-glucosidase activity (BGa) over time and how this variability is affected by tillage and organic fertilization remain poorly elucidated. We investigated how contrasting tillage practices (zero, minimum, conventional or deep) and organic amendment application (dairy cattle slurry or green compost) govern BGa. Strong correlations (r = −0.98; p < 0.001) were found between BGa and preceding cumulative rainfall for soil without crops. Under cropped soil conditions, BGa was 53% greater under zero and minimum tillage than under ploughed treatments (p < 0.05) six years after their applications. These differences could be explained by associated effects of tillage on organic matter content, electrical conductivity and water stable aggregates. The separated organic residue experiment showed that BGa was 36% greater in soil amended with slurry than in soil amended with compost (p < 0.05) five years after their applications. Finally, the response ratio of BGa was calculated in order to study the effect size of each treatment at each sampling period. This simple strategy mitigated the variation on BGa measurements between two sampling periods, and may be applied in future studies to improve the interpretation of other potential soil quality indicators that are sensitive to seasonal changes.

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Carbon and nitrogen mineralization dynamics in different soils of the tropics amended with legume residues and contrasting soil moisture contents

Cited by 95 publications

References 50 publications

Cover Crop Residue Amount and Quality Effects on Soil Organic Carbon Mineralization

Cover Crop Residue Amount and Quality Effects on Soil Organic Carbon Mineralization

Comparison of two kinetics models for estimating N mineralization affected by different quality of organic matter in Typic Hapludults

Influence of Tillage Practices, Organic Manures and Extrinsic Factors on β-Glucosidase Activity: The Final Step of Cellulose Hydrolysis

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