Increased litter input increases litter decomposition and soil respiration but has minor effects on soil organic carbon in subtropical forests

Fang, Xiong; Zhao, Liang; Zhou, Guoyi; Huang, Wenjuan; Liu, Juxiu

doi:10.1007/s11104-015-2450-4

Cited by 77 publications

(41 citation statements)

References 70 publications

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“…Similarly, we found that mixed-species litter significantly promoted soil respiration. Previous studies suggested that differences in initial litter chemical traits combined with increasing litter inputs could result in potential changes in soil respiration [1, 57]. In a previous study [38], we found that mass loss of litter mixtures was slightly more often promoted by species mixing.…”

Section: Discussionsupporting

confidence: 44%

Species diversity and chemical properties of litter influence non-additive effects of litter mixtures on soil carbon and nitrogen cycling

Mao

Zeng

2017

PLoS ONE

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Decomposition of litter mixtures generally cannot be predicted from the component species incubated in isolation. Therefore, such non-additive effects of litter mixing on soil C and N dynamics remain poorly understood in terrestrial ecosystems. In this study, litters of Mongolian pine and three dominant understory species and soil were collected from a Mongolian pine plantation in Northeast China. In order to examine the effects of mixed-species litter on soil microbial biomass N, soil net N mineralization and soil respiration, four single litter species and their mixtures consisting of all possible 2-, 3- and 4-species combinations were added to soils, respectively. In most instances, species mixing produced synergistic non-additive effects on soil microbial biomass N and soil respiration, but antagonistic non-additive effects on net N mineralization. Species composition rather than species richness explained the non-additive effects of species mixing on soil microbial biomass N and net N mineralization, due to the interspecific differences in litter chemical composition. Both litter species composition and richness explained non-additive soil respiration responses to mixed-species litter, while litter chemical diversity and chemical composition did not. Our study indicated that litter mixtures promoted soil microbial biomass N and soil respiration, and inhibited net N mineralization. Soil N related processes rather than soil respiration were partly explained by litter chemical composition and chemical diversity, highlighting the importance of functional diversity of litter on soil N cycling.

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Section: Discussionsupporting

confidence: 44%

Species diversity and chemical properties of litter influence non-additive effects of litter mixtures on soil carbon and nitrogen cycling

Mao

Zeng

2017

PLoS ONE

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“…These studies suggest that modifying stand conditions could result in complex influences on the amount of litter. Litter amount can affect the rates of decomposition by changing physicochemical characteristics and resource variability in litter horizons (Fang, Zhao, Zhou, Huang, & Liu, 2015;Gripp et al, 2018;Parsons et al, 2014). Conversely, the discrepancies in litter properties at different decomposition stages may also result in variability of litter amount.…”

Section: Introductionmentioning

confidence: 99%

Spatial variability in the amount of forest litter at the local scale in northeastern China: Kriging and cokriging approaches to interpolation

Qin

Wang

Lei

et al. 2019

Ecology and Evolution

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Litter is essential to promote nutrient cycling and maintain the sustainability of forest resources. However, its variability has not been sufficiently studied at the local scale.The prediction of litter amount using ordinary cokriging with Pearson correlation analysis (COK P ) and ordinary cokriging with principal component analysis (COK PCA ) was compared with that using ordinary kriging (OK) based on cross-validation at the local scale of a 1-ha plot over natural spruce-fir mixed forest in Jilin Province, China.Litter samples in semidecomposed (F) and complete decomposed (H) horizons were collected using an equidistant grid point sampling of 10 m × 10 m. Pearson correlation analysis and principal component analysis (PCA) were used to confirm auxiliary variables. The results showed that the amount of litter was 19.65 t/ha in the F horizon and 10.37 t/ha in the H horizon. The spatial structure variance ratio in the H horizon was smaller than that in the F horizon, indicative of its stronger spatial autocorrelation. Spatial distributions of litter amount in both horizons exhibited a patchy and heterogeneous pattern. Of the selected stand characteristics and litter properties, litter moisture content indicated the strongest relationship with litter amount. Cross-validation revealed that COK PCA using the comprehensive score as an auxiliary variable produced the most accurate map. The average standard error and root-mean-square error between the predicted and measured values were always smaller, the mean error and mean standardized error were much closer to 0, and the root-mean-square standardized error was closer to 1 than COK P using litter moisture and OK. Therefore, a clear advantage of cokriging based on principal component analysis was observed and COK PCA was found to be a very useful approach for further interpolation prediction. K E Y W O R D S cokriging, kriging, litter amount, principal component analysis | 779 QIN et al.

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“…Scientists recently pay more attention to the changes in soil C sequestration and water cycling following afforestation (Huang et al, 2011;Tang and Li, 2013;Cao and Zhang, 2015), but usually ignore the soil N dynamic after afforestation for decades, which may not be enough to capture the trends in long-term soil organic matter (SOM) dynamics (Davidson et al, 2007). It has been suggested afforestation can impact the soil organic C and N dynamics by altering SOM input and decomposition rate Deng et al, 2014;Fang et al, 2015). However, our understanding of soil organic C and N dynamics is still limited, particularly the different turnover of SOM fractions in response to afforestation (Marin-Spiotta et al, 2009;Huang et al, 2011;Cheng et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Shifts in soil organic carbon and nitrogen dynamics for afforestation in central China

Dou

Xiao

et al. 2016

Ecological Engineering

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Increased litter input increases litter decomposition and soil respiration but has minor effects on soil organic carbon in subtropical forests

Cited by 77 publications

References 70 publications

Species diversity and chemical properties of litter influence non-additive effects of litter mixtures on soil carbon and nitrogen cycling

Species diversity and chemical properties of litter influence non-additive effects of litter mixtures on soil carbon and nitrogen cycling

Spatial variability in the amount of forest litter at the local scale in northeastern China: Kriging and cokriging approaches to interpolation

Shifts in soil organic carbon and nitrogen dynamics for afforestation in central China

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