Microbial activities during the early stage of laboratory decomposition of tropical leaf litters: the effect of interactions between litter quality and exogenous inorganic nitrogen

Sall, Saïdou Nourou; Masse, Dominique; Guisse, Aliou; Chotte, Jean-Luc

doi:10.1007/s00374-003-0679-1

Cited by 61 publications

(26 citation statements)

References 37 publications

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“…Although litter mass loss may be regulated by different initial chemical parameters at different stages of decomposition (Loranger et al 2002;Sall et al 2003), higher litter mass remaining was always found in two pine needle litters than that in Cj and Od litter throughout incubation. The slower decomposition rates of Pt and Pr needle litters were associated with the poorer quality such as lower N concentration, lower soluble C, higher phenol, higher C/N ratio and lignin/N ratio.…”

Section: Discussionmentioning

confidence: 98%

“…The abundance of polyphenols in the two pine litters could explain this result. With the microbial utilization and disappearance of energy-rich molecules, the presence of polyphenols could inhibit microbial growth (Boufalis and Pellissier 1994;Sall et al 2003) and produce low microbial mineralization. In all microcosms, the concentration of NO 3 À -N continuously increased because NO 3 À -N was also not leached in microcosms and high activity of autotrophic nitrifers occurred in soils.…”

Section: Discussionmentioning

confidence: 99%

“…In forests, litter quality exerts an important feedback on soil N dynamic and availability. However, research into soil N pools and cycling during the process of litter decomposition has traditionally focused on inorganic forms of N (Mary et al 1996;Maithani et al 1998;Sall et al 2003;Vargas et al 2006) and less has been concerned with soil dissolved organic nitrogen (DON). Recent studies have indicated that DON is present in substantial quantities in a wide range of ecosystems and that it has been proposed to be an important substrate for N cycling pathways (Murphy et al 2000;Neff et al 2003;Jones et al 2004).…”

Section: Introductionmentioning

confidence: 99%

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Effects of mixing pine and broadleaved tree/shrub litter on decomposition and N dynamics in laboratory microcosms

Pan

et al. 2008

Ecological Research

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This study was carried out to compare the ecological function of exotic pine (Pinus radiata-Pr) and native pine (Pinus tabulaeformis-Pt) in terms of litter decomposition and its related N dynamics and to evaluate if the presence of broad-leaved tree species (Cercidiphyllum japonicum-Cj) or shrub species (Ostryopsis davidiana-Od) litter would promote the decomposition of pine needles and N cycling. Mass remaining, N release of the four single-species litters and mixed-species (Pt + Cj; Pr + Cj; Pt + Od; Pr + Od) litters and soil N dynamics were measured at microcosm scale during an 84-day incubation period. The Pt and Pr litter, with poorer substrate quality, indicated slower decomposition rates than did the Cj and Od litter. Due to their high C/N ratios, the N mass of Pt and Pr litter continuously increased during the early stage of decomposition, which showed that Pt and Pr litter immobilized exogenous N by microbes. No significant differences of soil inorganic, dissolved organic and microbial biomass N were found between the Pt and Pr microcosm at each sampling. The results showed that the exotic Pr performed similar ecological function to the native Pt in terms of litter decomposition and N dynamics during the early stage. The presence of Cj or Od litter increased the decomposition rates of pine needle litter and also dramatically increased soil N availability. So it is feasible for plantation managers to consider the use of Cj as an ameliorative species or to retain Od in pine plantations to promote the decomposition of pine litter and increase nutrient circulation. The results also suggested that different species litters induced different soil dissolved organic nitrogen (DON). As a major soluble N pool in soil, DON developed a different changing tendency over time compared with inorganic N, and should be included into soil N dynamic under the condition of our study.

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“…By selecting crop rotation and/or management practices such as minimum tillage to reduce soil disturbance and/or increase the amount of residue returned to the soil, soil organic carbon and nitrogen can be increased in the system [6,8,9]. The rate of decomposition and N mineralization increases by increasing the quality of a plant residue [10,11]. Although the quality of a residue is an important factor to determine the C and N mineralization rate, residue management is a factor affecting this process [12].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Crop Residues on Soil Nitrogen Dynamics and Wheat Yield

Kamkar¹

2014

APAR

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“…Les résultats sont très contradictoires. Certains résultats ont montré qu'une addition de fertilisants minéraux augmente la minéralisation des résidus organiques (Berg & Matzner, 1997), alors que d'autres études ont trouvé que la fertilisation azotée réduit la décomposition des résidus (Bremer et al, 1991 ;Sall et al, 2003) par une diminution de l'abondance des espèces fongiques (Donnison et al, 2000). Cependant, rares sont les études qui mettent en relation la qualité des résidus organiques, les effets de la disponibilité de N minéral sur les activités fongiques et la formation des agrégats.…”

Section: Introductionunclassified

Effets d’application sur le long terme de fertilisants organiques et minéraux sur l’agrégation et les activités microbiennes d’un sol tropical sableux au Burkina Faso

Sall¹,

Hien²,

Guisse³

2017

J. App. Bioscience.

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, Aliou GUISSE Les teneurs en C, N et P, les agrégats formés, le potentiel de respiration du sol, les activités de la chitinase et la longueur des hyphes fongiques ont été déterminés. Les résultats ont montré que l'apport sur le long terme des résidus organiques entraine une augmentation de la quantité des macro-agrégats (> 2000 µm) comparé au sol témoin. Cependant, cette augmentation ne dépend pas de la qualité des résidus organiques. Les résultats montrent que les macro-agrégats > 2000 µm sont corrélés aux hyphes fongiques, mais pas à l'activité chitinase. L'apport de N minéral exogène entraine une diminution de la macro-agrégation qui résulterait d'une complexation des polyphénols, agents agrégeants dans le processus d'agrégation pour le long terme. Conclusion et application des résultats : Cette étude à long terme confirme nos premiers résultats obtenu sur le cours terme et qui stipulent que la formation des macro-agrégats ne dépend pas de la qualité de résidus organiques. La mesure des hyphes fongiques semble plus déterminante dans la formation des macro-agrégats à long terme, par opposition aux activités fongiques dans le court terme. Mots clés: résidus organiques, N minéral, agrégation, activités fongiques, Lixisol. Effets d'application sur le long terme de fertilisants organiques et minéraux sur l'agrégation et les activités microbiennes d'un sol tropical sableux au Burkina Faso 10372Long-term effect of organic residues and mineral fertilizers on soil aggregation and microbial activities in a tropical sandy soil in Burkina Faso ABSTRACT Objective: The objective was to study the effect of the long-term application of organic amendments and inorganic fertilizers on the formation and stability of soil aggregates and microbial activities in a tropical sandy soil in Saria (Burkina Faso). The relationships between aggregation, microbial activities and the amendments were discussed. Methodology and results:This study was performed in a long-term (27 years) experimental field in Saria (Burkina Faso) with a continuous sorghum (Sorghum bicolor) cropping system. A randomized block experiment comprising organic amendment (unamended control, straw at 83 t ha −1 , manure at 10 t ha −1 ) coupled with mineral (no urea, urea at 60 kg ha −1 ) was sampled. Chemical parameters (C, N and P), the formation of aggregates, C mineralization, fungal hyphae length, and chitinase activity were measured in soil. The results showed that there were more macroaggregates (>2000 µm) in soils amended with residues. However, the formation of macro-aggregates was not significantly affected by the quality of residues. The results showed that the macro-aggregates were correlated to fungal hyphae, but not to chitinase activity. The addition of exogenous mineral N reduced the macro-aggregation that would result from complexation of polyphenols that have been considered to be a primary factor in the aggregation process for the long-term experiment. Conclusions and application of the results:This long-term study confirms our previous results obt...

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Microbial activities during the early stage of laboratory decomposition of tropical leaf litters: the effect of interactions between litter quality and exogenous inorganic nitrogen

Cited by 61 publications

References 37 publications

Effects of mixing pine and broadleaved tree/shrub litter on decomposition and N dynamics in laboratory microcosms

The Effect of Crop Residues on Soil Nitrogen Dynamics and Wheat Yield

Effets d’application sur le long terme de fertilisants organiques et minéraux sur l’agrégation et les activités microbiennes d’un sol tropical sableux au Burkina Faso

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