Effects of Mixing Feldspathic Sandstone and Sand on Soil Microbial Biomass and Extracellular Enzyme Activities—A Case Study in Mu Us Sandy Land in China
| Autor: | Russell Doughty, Fazhu Zhao, Hongying Bai, Xiuxiu Feng, Lu Zhang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010504 meteorology & atmospheric sciences
feldspathic sandstone chemistry.chemical_element Biomass 01 natural sciences lcsh:Technology complex mixtures Field capacity lcsh:Chemistry Total inorganic carbon General Materials Science Instrumentation lcsh:QH301-705.5 0105 earth and related environmental sciences Fluid Flow and Transfer Processes ecological stoichiometry biology Chemistry lcsh:T Process Chemistry and Technology Phosphorus General Engineering 04 agricultural and veterinary sciences Soil carbon extracellular enzyme activity Soil quality Enzyme assay lcsh:QC1-999 Mu Us sandy land soil microbial biomass Computer Science Applications lcsh:Biology (General) lcsh:QD1-999 lcsh:TA1-2040 Environmental chemistry Soil water 040103 agronomy & agriculture biology.protein 0401 agriculture forestry and fisheries lcsh:Engineering (General). Civil engineering (General) sand soil lcsh:Physics |
| Zdroj: | Applied Sciences Volume 9 Issue 19 Applied Sciences, Vol 9, Iss 19, p 3963 (2019) |
| ISSN: | 2076-3417 |
| DOI: | 10.3390/app9193963 |
| Popis: | Microbial biomass, extracellular enzyme activity, and their stoichiometry in soil play an important role in ecosystem dynamics and functioning. To better understand the improvement of sand soil quality and the limitation of soil nutrients after adding feldspathic sandstone, we investigated changes in soil microbial activity after 10 months of mixing feldspathic sandstone and sand, and compared the dynamics with soil properties. We used fumigation extraction to determine soil microbial biomass carbon (MBC), nitrogen (MBN), phosphorus (MBP), and microplate fluorometric techniques to measure soil &beta 1,4-glucosidase (BG), &beta 1,4-xylosidase (BX), &beta D-cellobiohydrolase (CBH), N-acetyl-&beta glucosaminidase (NAG), and Alkaline phosphatase (AKP). We also measured soil organic carbon (SOC), pH, electrical conductivity (EC), soil inorganic carbon (SIC), and soil water content (SWC). Our results showed that the soil microbial biomass C, N, P, and individual extracellular enzyme activities significantly increased in mixed soil. Similarly, the soil microbial biomass C:N, C:P, N:P, MBC:SOC, and BG:NAG significantly increased by 54.3%, 106.3%, 33.1%, 23.0%, and 65.4%, respectively. However, BG:AKP and NAG:AKP decreased by 19.0% and 50.3%, respectively. Additionally, redundancy analysis (RDA) and Pearson&rsquo s correlation analysis showed that SWC, SOC, porosity and field capacity were significantly associated with soil microbial biomass indices (i.e., C, N, P, C:N, C:P, N:P in microbial biomass, and MBC:SOC) and extracellular enzyme activity metrics (i.e., individual enzyme activity, ecoenzymatic stoichiometry, and vector characteristics of enzyme activity), while pH, EC, and SIC had no correlation with these indices and metrics. These results indicated that mixing feldspathic sandstone and sand is highly susceptible to changes in soil microbial activity, and the soil N limitation decreased while P became more limited. In summary, our research showed that adding feldspathic sandstone into sand can significantly improve soil quality and provide a theoretical basis for the development of desertified land resources. |
| Databáze: | OpenAIRE |
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