Stoichiometry of soil microbial biomass carbon and microbial biomass nitrogen in China's temperate and alpine grasslands

Zhao, Huan; Sun, Jian; Xu, Xingliang; Qin, Xiujuan

doi:10.1016/j.ejsobi.2017.09.007

Cited by 29 publications

(23 citation statements)

References 36 publications

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“…In this study, the content of the SMB C in alpine meadows was related to air temperature and was higher in cold months or seasons than it was in the warmer months and seasons. A previous study has also shown that the SMB C content was lower in high temperatures and warmer climate areas than it was in other climate areas (Wardle 1992;Zhao et al 2017). However, in this study, the SMB N content, ratio of SMB C/ SOC, ratio of SMB N/TN, and ratio of SMB C/SMB N did not decrease significantly with increasing air temperature (P > 0.05) ( Figure 6).…”

Section: Temporal Variability Of Soil Microbial Biomasscontrasting

confidence: 72%

“…Soil microbial biomass (SMB) plays a key role in the terrestrial ecological processes of carbon and nitrogen cycles, even though this biomass can account only for approximately 1.4% and 2.8% of the terrestrial soil carbon and nitrogen stores, respectively (Wardle 1998;Sorensen et al 2018). Moreover, SMB is the functional component of those microorganisms that regulate the decomposition of soil organic matter (SOM) and nutrient transformations (Zhao et al 2017;Sorensen et al 2018). Furthermore, the seasonal change in SMB is crucial in regulating soil microbial turnover, nutrient availability and, ultimately, plant nutrition (Zhao et al 2017;Sorensen et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, SMB is the functional component of those microorganisms that regulate the decomposition of soil organic matter (SOM) and nutrient transformations (Zhao et al 2017;Sorensen et al 2018). Furthermore, the seasonal change in SMB is crucial in regulating soil microbial turnover, nutrient availability and, ultimately, plant nutrition (Zhao et al 2017;Sorensen et al 2018). In reality, the change in SMB is directly linked to the soil microbial activity and SOM decomposition during cold seasons in high-altitude regions (Larsen et al 2007;Schmidt et al 2007;Zhao et al 2017;Sorensen et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the seasonal change in SMB is crucial in regulating soil microbial turnover, nutrient availability and, ultimately, plant nutrition (Zhao et al 2017;Sorensen et al 2018). In reality, the change in SMB is directly linked to the soil microbial activity and SOM decomposition during cold seasons in high-altitude regions (Larsen et al 2007;Schmidt et al 2007;Zhao et al 2017;Sorensen et al 2018). In addition, the change in SMB level is directly linked to soil C and N turnover (including greenhouse gases fluxes and leaching of C and N) in soil of high-elevation regions (Blume et al 2002).…”

Section: Introductionmentioning

confidence: 99%

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Change in soil microbial biomass and regulating factors in an alpine meadow site on the Qinghai-Tibetan Plateau

2019

Soil Science and Plant Nutrition

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The change in soil microbial biomass (SMB) content and its direct links to soil organic matter (SOM) and environmental factors are not well understood for high-elevation regions. Therefore, this research investigated the temporal variation of SMB and its relationship with SOM and environmental factors in an alpine meadow site on the Qinghai-Tibetan Plateau. The soil organic carbon (SOC) and total nitrogen (TN) contents in alpine meadows showed monthly and seasonal variations and were higher in colder months, and the soil C/N ratio was higher in winter and in autumn than it was in the other seasons (P < 0.05). In addition, the changes in the SMB C and SMB N contents were notable at monthly and seasonal scales, whereas the SMB C and SMB N contents were higher in the winter and spring than they were in the other seasons (P < 0.05); the ratio of SMB C/SOC was higher in spring than it was in the other seasons; the ratio of the SMB N/TN content was higher in cold or cool months than it was in the other months; and the ratio of the SMB C/SMB N was highest in August (P < 0.05). Moreover, the SMB C and SMB N contents were significantly positively correlated to the SOC and TN contents (P < 0.01), and the SMB content was also significantly positively correlated to soil water content and air temperature (P < 0.05), or to soil bulk density and soil pH (P < 0.05). The results suggested that the change in the SMB in the alpine meadows was highly regulated by the SOC and TN and by monthly and seasonal changes in the soil bulk density, the soil pH, soil moisture, and air temperatures.

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Section: Temporal Variability Of Soil Microbial Biomasscontrasting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Change in soil microbial biomass and regulating factors in an alpine meadow site on the Qinghai-Tibetan Plateau

2019

Soil Science and Plant Nutrition

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“…Although there was convincingly positive effect of manure application on microbial biomass relative to mineral fertilizer, the mean SMBC of treatments with manure amendment (400.54 ± 18.21 mg C kg −1 ) is still not comparable to that in unmanaged ecosystems, e.g. 670.1 ± 27.9 mg C kg −1 in grassland soils in China (Zhao et al, 2017). This suggests that other agricultural disturbances such as tillage may restrain the potential recovery in microbial biomass by manure application (Stark et al, 2007).…”

Section: Overall Response Of Soil Microbial Biomass To Manure Applicamentioning

confidence: 95%

Changes in soil microbial biomass with manure application in cropping systems: A meta-analysis

Ren

Sun

Meng

et al. 2019

Soil and Tillage Research

118

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Effects of nitrogen and phosphorus additions on decomposition and accumulation of soil organic carbon in alpine meadows on the Tibetan Plateau

Zhang

Cheng

et al. 2020

Land Degrad Dev

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Nitrogen (N) and phosphorus (P) additions to grasslands increase aboveground plant biomass and modify plant community composition, thereby affecting plant‐derived organic carbon (C) input to soil and soil C cycling and storage. However, the effects of N and P additions on soil organic C (SOC) decomposition and sequestration are not fully understood and their underlying mechanisms are poorly known. This study aimed to explore the mechanisms underlying SOC decomposition and SOC content decline in the topsoil of alpine meadows on the Tibetan Plateau after 9‐years of field N and P additions. Stoichiometric characteristics of soil and microorganisms and their effects on microbial decomposition, including priming effects (PEs), C substrates decomposition, and microbial C use efficiency (CUE), were investigated by adding 13C labeled substrate (glucose or vanillin). Results showed that N and P additions differentially affected the magnitude and direction of PEs and SOC decomposition, accelerated mineralization of glucose and vanillin by 33–45% and 11–45%, respectively, but decreased microbial CUE of glucose and vanillin by 9–15% and 11–48%, respectively. These effects were caused by differential increase in microbial activity and acceleration of microbial decomposition due to N and P additions, and induced lower soil ecological stoichiometric ratios and higher microbial C:N:P ratios. The above effects led to different magnitudes of decomposition and accumulation of SOC and plant‐derived C substrate and thus decline in SOC content depending on N and P additions. We found that long‐term N and P additions would weaken soil functioning as a C pool for alpine meadows on the Tibetan Plateau.

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Stoichiometry of soil microbial biomass carbon and microbial biomass nitrogen in China's temperate and alpine grasslands

Cited by 29 publications

References 36 publications

Change in soil microbial biomass and regulating factors in an alpine meadow site on the Qinghai-Tibetan Plateau

Change in soil microbial biomass and regulating factors in an alpine meadow site on the Qinghai-Tibetan Plateau

Changes in soil microbial biomass with manure application in cropping systems: A meta-analysis

Effects of nitrogen and phosphorus additions on decomposition and accumulation of soil organic carbon in alpine meadows on the Tibetan Plateau

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