Effect of soil aggregate size and long-term contrasting tillage, stubble and nitrogen management regimes on CO2 fluxes from a Vertisol

Geoderma ◽  
2019 ◽  
Vol 337 ◽  
pp. 1086-1096 ◽  
Author(s):  
S.H. Reeves ◽  
J. Somasundaram ◽  
W.J. Wang ◽  
M.A. Heenan ◽  
D. Finn ◽  
...  
Keyword(s):  
Aggregate Size ◽  
Soil Aggregate ◽  
Nitrogen Management ◽  
Co2 Fluxes ◽  
Management Regimes

Soil aggregate size and long-term fertilization effects on the function and community of ammonia oxidizers

Geoderma ◽  
2019 ◽  
Vol 338 ◽  
pp. 107-117 ◽  
Author(s):  
Pei-Pei Li ◽  
Yan-Lai Han ◽  
Ji-Zheng He ◽  
Shui-Qing Zhang ◽  
Li-Mei Zhang
Keyword(s):  
Aggregate Size ◽  
Soil Aggregate ◽  
Ammonia Oxidizers ◽  
Fertilization Effects

Long term combined fertilization and soil aggregate size on the denitrification and community of denitrifiers

2020 ◽  
Vol 156 ◽  
pp. 103718
Author(s):  
Pei-Pei Li ◽  
Shui-Qing Zhang ◽  
Fang Li ◽  
Yu-Ting Zhang ◽  
Yan-Lai Han
Keyword(s):  
Aggregate Size ◽  
Soil Aggregate

scholarly journals Effects of long-term warming on microbial nutrient limitation of soil aggregates on the Qinghai-Tibet Plateau

2021 ◽  
Author(s):  
Wenjing Chen ◽  
Huakun Zhou ◽  
Leilei Qiao ◽  
Yuanze Li ◽  
Yang Wu ◽  
...  
Keyword(s):  
Soil Aggregates ◽  
Aggregate Size ◽  
Soil Aggregate ◽  
Tibet Plateau ◽  
Alpine Meadows ◽  
P Limitation ◽  
Microbial Nutrient Limitation ◽  
Qinghai Tibet Plateau ◽  
C Limitation

Abstract Background and aims Global warming has increasingly serious impacts on the structure and function of the Tibetan Plateau ecosystem. However, the mechanism by which warming affects the biogeochemical processes, and consequently the microbial nutrient limitation in soil aggregates, is not clear. Methods In the present study, we used open-top chamber experiments to simulate warming in an alpine meadow and an alpine shrubland on the Qinghai-Tibet Plateau, and we measured the C, N, and P-acquiring enzyme (β-1, 4-glucosidase, BG; leucine aminopeptidase, LAP; β-N-acetylglucosaminidase, NAG; alkali phosphatase, AP) activities and their stoichiometry to understand how warming affects microorganism-limiting mechanisms in soil aggregates. Results The results showed that long-term warming treatment significantly decreased soil organic carbon (SOC) and total nitrogen (TN) concentrations of large macroaggregates (LMGA) and small macroaggregates (SMGA) in alpine meadows, but significantly increased SOC concentration of LMGA in alpine shrubland. The SOC and TN concentrations of alpine meadows increased with the decrease of soil aggregate size and the concentrations in microaggregate (MIGA) were significantly higher than those LMGA. Soil enzyme activity increased with the decrease in aggregate size and was not significantly affected by warming treatment. Enzyme stoichiometry results demonstrated that soil microbes in alpine meadows and shrubland were limited by nutrient P relative to nitrogen; moreover, the long-term warming treatment aggravated the P limitation of soil microorganisms in the shrubland, and it had significant differences in LMGA and MIGA. At the same time, the long-term warming treatment had no significant effect on C limitation in the alpine shrubland and alpine meadows, but soil aggregate size affected the C limitation patterns of microorganisms and showed the greatest limitations in MIGA. Conclusions The microbial P limitation in shrubland is more sensitive to warming than that in meadow. Soil aggregates mediate the acquisition of C by microorganisms, and the C limitation in MIGA is the greatest. By providing a new perspective on this topic, our study increased our understanding of the effects of warming on microbial nutrient utilization and restriction patterns in soil aggregates.

Soil aggregate size-dependent relationships between microbial functional diversity and multifunctionality

2021 ◽  
Vol 154 ◽  
pp. 108143
Author(s):  
Shun Han ◽  
Manuel Delgado-Baquerizo ◽  
Xuesong Luo ◽  
Yurong Liu ◽  
Joy D. Van Nostrand ◽  
...  
Keyword(s):  
Functional Diversity ◽  
Aggregate Size ◽  
Soil Aggregate ◽  
Microbial Functional Diversity ◽  
Size Dependent

Aging shapes the distribution of copper in soil aggregate size fractions

2018 ◽  
Vol 233 ◽  
pp. 569-576 ◽  
Author(s):  
Qi Li ◽  
Huihui Du ◽  
Wenli Chen ◽  
Jialong Hao ◽  
Qiaoyun Huang ◽  
...  
Keyword(s):  
Aggregate Size ◽  
Soil Aggregate ◽  
Size Fractions
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