Temperature sensitivity of soil carbon decomposition due to shifts in soil extracellular enzymes after afforestation

Wang, J.Y.; Ren, Chao; Feng, Xiuxiu; Zhang, L.; Doughty, Russell; Zhao, Fazhu

doi:10.1016/j.geoderma.2020.114426

Cited by 26 publications

(16 citation statements)

References 55 publications

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“…This may be due to higher SOC and N contents in the paddy field (Table 1), which provided more C and N substrates for rhizosphere soil arylamidase and urease enzyme growth and multiplication, and stimulate rhizosphere soil arylamidase and urease activities (Pandey et al, 2014). On the other hand, a higher SOC content increases the ability of soil to protect extracellular soil enzyme and provides more functional enzyme molecules in the paddy field (Wang et al, 2020). Therefore, the results demonstrated that differences in the soil microbial nutrient and soil environment (soil properties) condition between different tillage treatments might be the main reason demonstrating the change of rhizosphere soil enzyme activities in the double-cropping rice paddy field.…”

Section: Effects Of Tillage Management On Soil Enzyme Activitiesmentioning

confidence: 99%

Effects of different tillage management on rhizosphere soil nitrogen mineralization and its extracellular enzyme activity in a double‐cropping rice paddy field of southern China

Tang

Cheng

et al. 2021

Land Degrad Dev

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Soil extracellular enzyme activity plays an important role in regulating the process of nitrogen (N) mineralization in the paddy field. However, there is still limited information about how rhizosphere N mineralization and its extracellular enzyme activities respond to different tillage treatments in a double-cropping rice paddy fields of southern China.Therefore, the effects of 6-year (short-term) tillage management on rhizosphere soil acid hydrolysable N and its fractions, N mineralization, and its extracellular enzyme activities in a double-cropping rice paddy fields of southern China were studied and reported in this article. The field experiment included four tillage treatments: conventional tillage with crop residue incorporation (CT), rotary tillage with crop residue incorporation (RT), no-tillage with crop residue retention (NT), and rotary tillage with crop residue removed as a control (RTO). The results showed that rhizosphere soil total acid hydrolysable N and its fractions with CT, RT and NT treatments were higher than those with RTO treatment. Compared to RTO treatment, the rhizosphere soil total acid hydrolysable N content with CT and RT treatments was increased by 19.17% and 17.74%, respectively.Compared to RTO treatment, the rhizosphere soil aerobic and anaerobic N mineralization rates with CT and RT treatments were increased by 100.00% and 80.65%, and 43.02% and 33.72%, respectively. Rhizosphere soil extracellular enzyme activities with CT and RT treatments were higher than those with NT and RTO treatments. There was a positive correlation between rhizosphere soil amino sugar N, amino acid N, total acid hydrolysable N contents, L-glutaminase activity and N mineralization rate. The principal component analysis results indicated that rhizosphere soil organic carbon, amino sugar N, amino acid N and total acid hydrolysable N contents, soil β-glucosaminidase, β-glucosidase and L-glutaminase activities were the main factors affecting rhizosphere soil aerobic and anaerobic N mineralization rates. As a result, rhizosphere soil acid hydrolysable N and its fractions, N mineralization, and its extracellular enzyme activities were significantly increased under the combined application of conventional tillage and rotary tillage with the crop residue incorporation condition.

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Section: Effects Of Tillage Management On Soil Enzyme Activitiesmentioning

confidence: 99%

Effects of different tillage management on rhizosphere soil nitrogen mineralization and its extracellular enzyme activity in a double‐cropping rice paddy field of southern China

Tang

Cheng

et al. 2021

Land Degrad Dev

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“…SOC fractions are highly heterogeneous, it is important to study the size and decomposition rate of different SOC fractions pools for understanding SOC turnover [18,19]. The dynamics model is widely used to distinguish different C pools because it is relatively simple and parameters are easy to obtain [20,21]. Given the absence of exogenous organic matter in the incubation studies, it is typically considered reasonable to fit a mathematical model to the relationship between soil CO 2 release and time in order to identify the size and decomposition rate of different C pools [22].…”

Section: Introductionmentioning

confidence: 99%

Conversion effects of farmland to Zanthoxylum bungeanum plantations on soil organic carbon mineralization in the arid valley of the upper reaches of Yangtze River, China

Saba

Wang

et al. 2022

PLoS ONE

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Farmland conversion to forest is considered to be one of the effective measures to mitigate climate change. However, the impact of farmland conversion to forest land or grassland on soil CO2 emission in arid areas is unclear due to the lack of comparative information on soil organic carbon (SOC) mineralization of different conversion types. The SOC mineralization in 0–100 cm soil layer in farmland (FL), abandoned land (AL) and different ages (including 8, 15, 20 and 28 years) of Zanthoxylum bungeanum plantations were measured by laboratory incubation. The size and decomposition rate of fast pool (Cf) and slow pool (Cs) in different land-use types and soil layers were estimated by double exponential model. The results showed that: 1) Farmland conversion increased the cumulative CO2-C release (Cmin) and SOC mineralization efficiency, and those indexes in AL were higher than that in Z. bungeanum plantations. The Cmin and SOC mineralization efficiency of 0–100 cm soil increased with the ages of Z. bungeanum plantation. Both Cmin and SOC mineralization efficiency decreased with the increase of soil depth; 2) Both soil Cf and Cs increased after farmland converted to Z. bungeanum plantations and AL. The Cs in the same soil layer increased with the ages of Z. bungeanum plantation, and the Cf showed a “V” type with the increased ages of Z. bungeanum plantation. The Cf and Cs decreased with the increase of soil depth in all land-use types; 3) Farmland conversion increased the decomposition rate of Cf (k1) in all soil layer by 0.008–0.143 d−1 and 0.082–0.148 d−1 in Z. bungeanum plantations and AL, respectively. The k1 was obviously higher in the 0−20 cm soil layer than that in other soil layers, while the decomposition rate of Cs (k2) was not affected by FL conversion and soil depth; and 4) The initial soil chemical properties and enzyme activity affected SOC mineralization, especially the concentrations of total organic nitrogen (TON), SOC, easily oxidizable organic carbon (EOC) and microbial biomass carbon (MBC). It indicated that the conversion of farmland to Z. bungeanum plantations and AL increases SOC mineralization, especially in deeper soils, and it increased with the ages. The conversion of farmland to Z. bungeanum plantation is the optimal measure when the potential C sequestration of plant-soil system were taken in consideration.

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“…Of the total ecosystem respiration in forests, 60-90% is Rs [12]. It is well-documented that soil temperature and soil moisture are the dominant factors controlling Rs and thus are well-modeled by empirical functions [13][14][15][16][17][18][19]. Vegetation in a forest also controls Rs through its effect on litter quality and quantity, root exudates and biomass, the microbial community, and surface soil temperature [20][21][22][23][24].…”

Section: Introductionmentioning

confidence: 99%

“…The role that changing tree species composition plays in soil CO 2 emissions is unclear, especially in terms of afforestation in the Asian monsoon region. A number of recent studies reported that several key factors influence CO 2 release via changes in Rs after afforestation [16,27]. Therefore, the study of influence magnitudes of afforestation on Rs should receive more attention in the Asian monsoon region.…”

Section: Introductionmentioning

confidence: 99%

Soil Respiration Variation among Four Tree Species at Young Afforested Sites under the Influence of Frequent Typhoon Occurrences

Chiang¹,

Yu²,

Lai³

2021

Forests

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Afforestation is an effective solution for restoring forest ecosystems and mitigating climate change in the tropics. In this study, we analyzed the soil respiration (Rs) at four afforested sites with different tree species exposed to a monsoon climate with frequent typhoon occurrences in southern Taiwan. The aim of this study is to examine (1) the distinct seasonal variation that strongly affects the Rs among four tree species at afforested sites, (2) the patterns of Rs that differ among the four species at the afforested sites, and (3) the influence of typhoons on forest structure and consequently the degree of Rs. The annual mean Rs among the four tree species at the afforested sites in the pretyphoon disturbance year was approximately 7.65 t C ha−1, with the post-typhoon year having an annual mean Rs of approximately 9.13 t C ha−1. Our results clearly show Rs variations in the four tree species at the young afforested sites under the influence of typhoon disturbances. The high seasonal variations in Rs were controlled by soil temperature and soil moisture. The different tree species also led to variations in litterfall production and consequently influenced Rs variation. Forest structures, such as aboveground biomass and consequently the degree of Rs, were disturbed by severe typhoon impacts in 2016, resulting in high aboveground biomass with tree height losses and litterfall accumulation. Furthermore, Rs increased immediately after litterfall input to the soil, and the addition effect of litter and the soil C release occurred throughout the year after typhoon disturbances. Our results contribute to understanding impact of typhoon disturbances on the degree of Rs at tropical afforested sites.

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Temperature sensitivity of soil carbon decomposition due to shifts in soil extracellular enzymes after afforestation

Cited by 26 publications

References 55 publications

Effects of different tillage management on rhizosphere soil nitrogen mineralization and its extracellular enzyme activity in a double‐cropping rice paddy field of southern China

Effects of different tillage management on rhizosphere soil nitrogen mineralization and its extracellular enzyme activity in a double‐cropping rice paddy field of southern China

Conversion effects of farmland to Zanthoxylum bungeanum plantations on soil organic carbon mineralization in the arid valley of the upper reaches of Yangtze River, China

Soil Respiration Variation among Four Tree Species at Young Afforested Sites under the Influence of Frequent Typhoon Occurrences

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