Influences of nitrogen addition and aboveground litter-input manipulations on soil respiration and biochemical properties in a subtropical forest

Peng, Yong; Li, Zengyan; Li, Shun; Chen, Guantao; Hu, Hongling; Xie, Jiulong; Chen, Gang; Xiao, Yinlong; Liu, Li; Tang, Yi; Tu, Lihua

doi:10.1016/j.soilbio.2019.107694

Cited by 41 publications

(28 citation statements)

References 81 publications

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“…First, exogenous N input can decrease the activity of decomposers, thereby slowing litter decomposition [13,41]. The previous studies in evergreen broadleaved forests in the same study area reported that N addition decreased the C and N contents of the soil microbial biomass [27,29,42]; thus, the decrease in soil microbial biomass may contribute to the lower rate of litter decomposition under the +N treatment in the current study. Second, high levels of N input usually slow the decomposition of litter due to soil N enrichment, or even aggravate soil nutrient imbalances [43].…”

Section: Rate Of Litter Decompositionmentioning

confidence: 55%

“…In this study, we carried out a two-year field experiment in a subtropical evergreen broadleaved forest in this rainy area to examine the responses of the litter decomposition and the release of C, N, and P to the addition of N and S. The aims of this study are to improve the understanding of the effects of N and S deposition on litter nutrient release in subtropical evergreen broadleaved forests in the studied area and to provide a reference for the management of these forests under the scenario of a sustained rise in N and S depositions. Previous studies in broadleaved forests in this rainy area have shown that the addition of N decreased soil microbial biomass [27][28][29] and the activities of soil C-cycle enzymes [30], suggesting that N input may negatively affect litter decomposition and nutrient release [21,31,32]. We thus hypothesized that (1) N addition would inhibit litter decomposition and decrease the release of C, N, and P in the study forest.…”

Section: Introductionmentioning

confidence: 95%

“…Considering the high levels of atmospheric deposition and the observations of previous N and S addition studies in the study area [25,[27][28][29][30], 150 kg N ha −1 y −1 and 300 kg S ha −1 y −1 were added in the present experiment, consisting of the control (CK, no added N or S), added N (+N, added 150 kg N ha −1 y −1 ), added S (+S, added 300 kg S ha −1 y −1 ), and added N and S (+NS, added 150 kg N ha −1 y −1 and 300 kg S ha −1 y −1 ) treatments. The N and S were from urea and sodium sulfate, respectively.…”

Section: Plot Design and Fertilizationmentioning

confidence: 99%

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The Additions of Nitrogen and Sulfur Synergistically Decrease the Release of Carbon and Nitrogen from Litter in a Subtropical Forest

Tie

Peñuelas

et al. 2020

Forests

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Atmospheric nitrogen (N) and sulfur (S) deposition in subtropical forests has increased rapidly and the current level is very high, thus seriously affecting nutrient (e.g., N and phosphorus (P)) release from litter. However, the specific effects of S addition and its interaction with N on the release of carbon (C), N, and P from litter in subtropical evergreen broadleaved forests are unclear. Therefore, a two-year field experiment was performed using a litterbag method in a subtropical evergreen broadleaved forest in western China to examine the responses of litter decomposition and nutrient release to the control (CK), added N (+N), added S (+S), and added N and S (+NS) treatments. The results showed that the remaining litter mass, lignin, cellulose, C, N, P, and litter N/P ratio were higher, whereas the litter C/N ratio and soil pH were lower in the fertilization treatments than in CK. The annual decomposition coefficients (k-values) in the +N, +S, and +NS treatments were 0.384 ± 0.002, 0.378 ± 0.002, and 0.374 ± 0.001 year−1, respectively, which were significantly lower than the k-values in CK (0.452 ± 0.005 year−1, p < 0.05). The remaining mass, lignin, cellulose, C, and litter N/P ratio were higher, whereas the soil pH was lower in the +NS treatment than in the +N and +S. The interactive effects of N addition and S addition on the remaining litter lignin, cellulose, C, N, and P; the litter C/N, C/P, and N/P ratios; and the soil pH were significant (p < 0.05). In conclusion, the addition of N and S synergistically decreased the degradation of lignin and cellulose and the release of C and N and increased the litter N/P ratio, suggesting that external N and S inputs synergistically slowed the release of C and N from litter and exacerbated litter P limitation during decomposition in this forest.

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Section: Rate Of Litter Decompositionmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 95%

Section: Plot Design and Fertilizationmentioning

confidence: 99%

See 1 more Smart Citation

The Additions of Nitrogen and Sulfur Synergistically Decrease the Release of Carbon and Nitrogen from Litter in a Subtropical Forest

Tie

Peñuelas

et al. 2020

Forests

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“…In situ manipulation experiments, such as detritus input and removal treatment (DIRT), can explore the effect of plant detritus on soil C and N characteristics by changing the amount of roots and litter inputs to the soil [ 9 , 10 ]. Extensive studies have also indicated that soil C and N contents have different responses to litter addition (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of litter and root manipulations on soil carbon and nitrogen in a Schrenk’s spruce (Picea schrenkiana) forest

et al. 2021

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Plant detritus represents the major source of soil carbon (C) and nitrogen (N), and changes in its quantity can influence below-ground biogeochemical processes in forests. However, we lack a mechanistic understanding of how above- and belowground detrital inputs affect soil C and N in mountain forests in an arid land. Here, we explored the effects of litter and root manipulations (control (CK), doubled litter input (DL), removal of litter (NL), root exclusion (NR), and a combination of litter removal and root exclusion (NI)) on soil C and N concentrations, enzyme activity and microbial biomass during a 2-year field experiment. We found that DL had no significant effect on soil total organic carbon (SOC) and total nitrogen (TN) but significantly increased soil dissolved organic carbon (DOC), microbial biomass C, N and inorganic N as well as soil cellulase, phosphatase and peroxidase activities. Conversely, NL and NR reduced soil C and N concentrations and enzyme activities. We also found an increase in the biomass of soil bacteria, fungi and actinomycetes in the DL treatment, while NL reduced the biomass of gram-positive bacteria, gram-negative bacteria and fungi by 5.15%, 17.50% and 14.17%, respectively. The NR decreased the biomass of these three taxonomic groups by 8.97%, 22.11% and 21.36%, respectively. Correlation analysis showed that soil biotic factors (enzyme activity and microbial biomass) and abiotic factors (soil moisture content) significantly controlled the change in soil C and N concentrations (P < 0.01). In brief, we found that the short-term input of plant detritus could markedly affect the concentrations and biological characteristics of the C and N fractions in soil. The removal experiment indicated that the contribution of roots to soil nutrients is greater than that of the litter.

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“…Após múltiplos ciclos, o solo passa por um período de pousio, onde inicia-se o processo de sucessão ecológica o qual origina florestas secundárias em diferentes estágios (Bruun, Ryan, de Neergaard, & Berry, 2020). Assim, a expansão destes ecossistemas nos últimos anos, bem como sua importância para mitigação das mudanças climáticas e diminuição na pressão sobre as florestas primárias, tornou esse tipo de floresta alvo corriqueiro de pesquisas científicas (Almeida et al, 2019;Peng et al, 2020;Sayer, 2006).…”

Section: Introductionunclassified

Densidade e composição do banco de sementes do solo em ecossistema sucessional de floresta na Amazônia Oriental, Brasil

Araújo

Rodrigues

Martins

et al. 2021

RSD

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Na Amazônia, a agricultura itinerante garante a subsistência das comunidades tradicionais, porém, ocasiona intensos impactos ambientais. A restauração florestal com o monitoramento de indicadores, como o banco de sementes é indispensável, pois, fornece informações sobre as espécies viáveis para germinação em cenários de distúrbios ecossistêmicos. Objetivou-se, portanto, avaliar a composição e a densidade do banco de semente de uma floresta sucessional na Amazônia, submetida à manipulação de água e nutrientes há 12 anos. As coletas foram realizadas de maneira aleatória, com o auxílio de um amostrador vazado, em um fragmento florestal com três tratamentos (controle - CTL, remoção de serapilheira - REM e irrigação periódica- IRR). Encontramos 684 indivíduos e 32 espécies. A densidade de indivíduos variou de 820 ± 112 a 972 ± 394 ind m-2 para REM e CTL, enquanto a de espécies variou de 188 ± 48 a 216 ± 9,24 spp m-2 para CTL e REM, respectivamente. Os arbustos apresentaram a maior quantidade de indivíduos emergentes, e os cipós, a menor. Os maiores índices de Shannon-Weanver e Pielou foram observados no CTL. As espécies Vismia guianensis, Cecropia obtusa e Cyperus rotundus foram as mais frequentes em todos os tratamentos e as espécies pioneiras predominaram. A velocidade de emergência do tratamento REM foi inferior ao CTL, enquanto o tempo médio de emergência foi semelhante entre os tratamentos. A composição e densidade do banco de sementes não foram afetadas pelo efeito residual da manipulação de serapilheira. Apesar disso, os resultados foram ligeiramente superiores para o tratamento CTL.

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Influences of nitrogen addition and aboveground litter-input manipulations on soil respiration and biochemical properties in a subtropical forest

Cited by 41 publications

References 81 publications

The Additions of Nitrogen and Sulfur Synergistically Decrease the Release of Carbon and Nitrogen from Litter in a Subtropical Forest

The Additions of Nitrogen and Sulfur Synergistically Decrease the Release of Carbon and Nitrogen from Litter in a Subtropical Forest

Effects of litter and root manipulations on soil carbon and nitrogen in a Schrenk’s spruce (Picea schrenkiana) forest

Densidade e composição do banco de sementes do solo em ecossistema sucessional de floresta na Amazônia Oriental, Brasil

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