Potential effect of warming on soil microbial nutrient limitations as determined by enzymatic stoichiometry in the farmland from different climate zones

Li, Huayong; Tian, Hua; Wang, Ziquan; Liu, Chaoyang; Nurzhan, Amanzhan; Megharaj, Mallavarapu; He, Wenjun

doi:10.1016/j.scitotenv.2021.149657

Cited by 13 publications

(3 citation statements)

References 41 publications

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“…However, after the jointing stage, especially in the trumpet stage and grout stage, soil NAG + LAP enzyme activity showed a trend of increasing first and then decreasing with the increase in nitrogen application levels. This is because since the jointing stage, the temperature in northern China has gradually increased, the rainfall has increased, the maize has grown vigorously, the root activity has increased, the secretion has increased, and the number of soil microorganisms has increased, so that the soil enzyme activity has increased significantly [29].…”

Section: Effects Of Different Nitrogen Application Levels On Soil Eea...mentioning

confidence: 99%

Effects of Plastic Film Mulching on Soil Enzyme Activities and Stoichiometry in Dryland Agroecosystems

Liu

Zhao

Hossain

et al. 2022

Plants

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Soil extracellular enzymes are pivotal for microbial nutrient cycling in the ecosystem. In order to study the effects of different nitrogen application rates under plastic film mulching on soil extracellular enzyme activities and stoichiometry, five nitrogen application levels (i.e., 0, 90, 150, 225 and 300 kg·hm−2) were set based on two treatments: plastic film mulching (PM) and no film mulching (LD). We measured the soil extracellular enzyme activities (EEAs) and stoichiometry (EES) of four enzymes (i.e., β-1,4-glucosidase (βG), leucine aminopeptidase (LAP), β-1,4-N-acetylaminoglucosidase (NAG) and alkaline phosphatase (AP)) involved in the C, N and P cycles of soil microorganisms in surface soil at five maize growth stages (seedling stage, jointing stage, trumpet stage, grout stage and harvest stage). The results showed that there were significant differences in soil EEA at different maize growth stages. The soil nutrient content and soil EEA were significantly improved under PM, and the stoichiometric ratio of extracellular enzymes (EC:N:P) was closer to 1:1:1, which indicated that PM was beneficial to the balance of soil nutrients and the activity of microorganisms. At each stage, with the increase in nitrogen application levels, the soil EEA showed a trend of increasing first and then decreasing (or remained unchanged), and both LD and PM treatments reached their highest activity at the 225 kg·hm−2 nitrogen application rate. When the nitrogen application level was less than 225 kg·hm−2, the soil enzyme activity was mainly limited by the N nutrient, and when the nitrogen application level reached 300 kg·hm−2, it was mainly limited by the P nutrient. RDA and correlation analysis showed that the soil C:P, C:N, N:P and pH had significant effects on soil βG, NAG + LAP and AP activities as well as EC:N, EC:P and EN:P.

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Section: Effects Of Different Nitrogen Application Levels On Soil Eea...mentioning

confidence: 99%

Effects of Plastic Film Mulching on Soil Enzyme Activities and Stoichiometry in Dryland Agroecosystems

Liu

Zhao

Hossain

et al. 2022

Plants

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“…66 However, the N-acquiring enzyme activities showed a positive relationship with the soil microbial N limitation, 67 and the difference recorded in our study can be explained by the contribution of microbial biomass to Nacquiring enzymes and the state of inorganic N demand. 28,68 According to Cui et al, 9 the combination of microbial activities and ecoenzymatic stoichiometry provides more accurate predictions of microbial metabolism limitations. On this basis, the reduction of microbial biomass after land use change from natural forests to managed ecosystems is associated with a reduction in enzyme activities.…”

Section: Land Use Change Affects the Soil Microbial N Limitationmentioning

confidence: 99%

“…Hence, it is unreasonable to evaluate the soil microbial N limitation after land use conversion solely based on enzyme activity. The sensitivity of enzymes varies with temperature, and changes in temperature may alter the stoichiometry of enzymes . In this sense, the effects of the microbial N limitation may depend on the climatic conditions. , In tropical regions, because of their high temperatures and humidity, , the soil GNM rates are higher than in temperate regions .…”

Section: Introductionmentioning

confidence: 99%

Land Use Change from Natural Tropical Forests to Managed Ecosystems Reduces Gross Nitrogen Production Rates and Increases the Soil Microbial Nitrogen Limitation

Zhu,

Liu,

Liu

et al. 2024

Environ. Sci. Technol.

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Understanding the underlying mechanisms of soil microbial nitrogen (N) utilization under land use change is critical to evaluating soil N availability or limitation and its environmental consequences. A combination of soil gross N production and ecoenzymatic stoichiometry provides a promising avenue for nutrient limitation assessment in soil microbial metabolism. Gross N production via 15 N tracing and ecoenzymatic stoichiometry through the vector and threshold element ratio (Vector-TER) model were quantified to evaluate the soil microbial N limitation in response to land use changes. We used tropical soil samples from a natural forest ecosystem and three managed ecosystems (paddy, rubber, and eucalyptus sites). Soil extracellular enzyme activities were significantly lower in managed ecosystems than in a natural forest. The Vector-TER model results indicated microbial carbon (C) and N limitations in the natural forest soil, and land use change from the natural forest to managed ecosystems increased the soil microbial N limitation. The soil microbial N limitation was positively related to gross N mineralization (GNM) and nitrification (GN) rates. The decrease in microbial biomass C and N as well as hydrolyzable ammonium N in managed ecosystems led to the decrease in N-acquiring enzymes, inhibiting GNM and GN rates and ultimately increasing the microbial N limitation. Soil GNM was also positively correlated with leucine aminopeptidase and β-Nacetylglucosaminidase. The results highlight that converting tropical natural forests to managed ecosystems can increase the soil microbial N limitation through reducing the soil microbial biomass and gross N production.

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Carbon and nutrient limitations of soil microbial metabolism in Quercus aquifolioides forest ecosystems along a precipitation gradient on the eastern Qinghai-Tibetan Plateau

et al. 2023

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Potential effect of warming on soil microbial nutrient limitations as determined by enzymatic stoichiometry in the farmland from different climate zones

Cited by 13 publications

References 41 publications

Effects of Plastic Film Mulching on Soil Enzyme Activities and Stoichiometry in Dryland Agroecosystems

Effects of Plastic Film Mulching on Soil Enzyme Activities and Stoichiometry in Dryland Agroecosystems

Land Use Change from Natural Tropical Forests to Managed Ecosystems Reduces Gross Nitrogen Production Rates and Increases the Soil Microbial Nitrogen Limitation

Carbon and nutrient limitations of soil microbial metabolism in Quercus aquifolioides forest ecosystems along a precipitation gradient on the eastern Qinghai-Tibetan Plateau

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