Effects of fumigation with 1,3-dichloropropene on soil enzyme activities and microbial communities in continuous-cropping soil

The effects of Fe–Mn–La ternary oxide-biochar composites on arsenic fractionation, soil enzyme activities, and microbial communities in arsenic-polluted soils were determined.

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Divergence of dominant factors in soil microbial communities and functions in forest ecosystems along a climatic gradient

Biogeosciences ◽

10.5194/bg-15-1217-2018 ◽

2018 ◽

Vol 15 (4) ◽

pp. 1217-1228 ◽

Cited By ~ 5

Author(s):

Zhiwei Xu ◽

Guirui Yu ◽

Xinyu Zhang ◽

Nianpeng He ◽

Qiufeng Wang ◽

...

Keyword(s):

Microbial Communities ◽

Enzyme Activities ◽

Soil Microbial Communities ◽

Soil Enzyme ◽

Secondary Forests ◽

Soil Enzyme Activities ◽

Climatic Zones ◽

Soil Microbial ◽

Warm Temperate ◽

Microbial Plfas

Abstract. Soil microorganisms play an important role in regulating nutrient cycling in terrestrial ecosystems. Most of the studies conducted thus far have been confined to a single forest biome or have focused on one or two controlling factors, and few have dealt with the integrated effects of climate, vegetation, and soil substrate availability on soil microbial communities and functions among different forests. In this study, we used phospholipid-derived fatty acid (PLFA) analysis to investigate soil microbial community structure and extracellular enzymatic activities to evaluate the functional potential of soil microbes of different types of forests in three different climatic zones along the north–south transect in eastern China (NSTEC). Both climate and forest type had significant effects on soil enzyme activities and microbial communities with considerable interactive effects. Except for soil acid phosphatase (AP), the other three enzyme activities were much higher in the warm temperate zone than in the temperate and the subtropical climate zones. The soil total PLFAs and bacteria were much higher in the temperate zone than in the warm temperate and the subtropical zones. The soil β-glucosidase (BG) and N-acetylglucosaminidase (NAG) activities were highest in the coniferous forest. Except for the soil fungi and fungi–bacteria (F/B), the different groups of microbial PLFAs were much higher in the conifer broad-leaved mixed forests than in the coniferous forests and the broad-leaved forests. In general, soil enzyme activities and microbial PLFAs were higher in primary forests than in secondary forests in temperate and warm temperate regions. In the subtropical region, soil enzyme activities were lower in the primary forests than in the secondary forests and microbial PLFAs did not differ significantly between primary and secondary forests. Different compositions of the tree species may cause variations in soil microbial communities and enzyme activities. Our results showed that the main controls on soil microbes and functions vary in different climatic zones and that the effects of soil moisture content, soil temperature, clay content, and the soil N ∕ P ratio were considerable. This information will add value to the modeling of microbial processes and will contribute to carbon cycling in large-scale carbon models.

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Effects of nutritional input and diesel contamination on soil enzyme activities and microbial communities in antarctic soils

The Journal of Microbiology ◽

10.1007/s12275-012-2636-x ◽

2012 ◽

Vol 50 (6) ◽

pp. 916-924 ◽

Cited By ~ 14

Author(s):

Jiwon Han ◽

Jaejoon Jung ◽

Seunghun Hyun ◽

Hyun Park ◽

Woojun Park

Keyword(s):

Microbial Communities ◽

Enzyme Activities ◽

Soil Enzyme ◽

Soil Enzyme Activities ◽

Antarctic Soils ◽

Diesel Contamination

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Comparative effects of the recovery from sulfuric and nitric acid rain on the soil enzyme activities and metabolic functions of soil microbial communities

The Science of The Total Environment ◽

10.1016/j.scitotenv.2020.136788 ◽

2020 ◽

Vol 714 ◽

pp. 136788 ◽

Cited By ~ 3

Author(s):

Xin Liu ◽

Chong Li ◽

Miaojing Meng ◽

Lu Zhai ◽

Bo Zhang ◽

...

Keyword(s):

Nitric Acid ◽

Microbial Communities ◽

Acid Rain ◽

Enzyme Activities ◽

Soil Microbial Communities ◽

Soil Enzyme ◽

Soil Enzyme Activities ◽

Soil Microbial ◽

Metabolic Functions

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Contrasting Effects of Chinese Fir Plantations of Different Stand Ages on Soil Enzyme Activities and Microbial Communities

Forests ◽

10.3390/f10010011 ◽

2018 ◽

Vol 10 (1) ◽

pp. 11 ◽

Cited By ~ 7

Author(s):

Chaoqun Wang ◽

Lin Xue ◽

Yuhong Dong ◽

Lingyu Hou ◽

Yihui Wei ◽

...

Keyword(s):

Microbial Community ◽

Microbial Communities ◽

Relative Abundance ◽

Enzyme Activities ◽

Soil Enzyme ◽

Chinese Fir ◽

Fungal Communities ◽

Stand Age ◽

Forest Age ◽

Soil Enzyme Activities

Soil enzymes and microbial communities are key factors in forest soil ecosystem functions and are affected by stand age. In this study, we studied soil enzyme activities, composition and diversity of bacterial and fungal communities and relevant physicochemical properties at 0–10 cm depth (D1), 10–20 cm depth (D2) and 20–30 cm depth (D3) soil layers in 3-(3a), 6-(6a), 12-(12a), 18-(18a), 25-(25a), 32-(32a) and 49-year-old (49a) Chinese fir plantations to further reveal the effects of stand age on soil biotic properties. Spectrophotometry and high-throughput sequencing was used to assess the soil enzyme activity and microbial community composition and diversity of Chinese fir plantation of different stand ages, respectively. We found that soil catalase activity increased as the stand age of Chinese fir plantations increased, whereas the activities of urease, sucrase and β-glucosidase in 12a, 18a and 25a were lower than those in 6a, 32a and 49a. Shannon and Chao1 indices of bacterial and fungal communities first decreased gradually from 6a to 18a or 25a and then increased gradually from 25a to 49a. Interestingly, the sucrase and β-glucosidase activities and the Shannon and Chao1 indices in 3a were all lower than 6a. We found that the relative abundance of dominant microbial phyla differed among stand ages and soil depths. The proportion of Acidobacteria first increased and then decreased from low forest age to high forest age, and its relative abundance in 12a, 18a and 25a were higher than 3a, 32a and 49a, but the proportion of Proteobacteria was opposite. The proportion of Ascomycota first decreased and then increased from 6a to 49a, and its relative abundance in 12a, 18a and 25a was lower than 3a, 6a, 32a and 49a. Our results indicate that soil enzyme activities and the richness and diversity of the microbial community are limited in the middle stand age (from 12a to 25a), which is important for developing forest management strategies to mitigate the impacts of degradation of soil biological activities.

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Effects of Garlic/Cucumber Relay Intercropping on Soil Enzyme Activities and the Microbial Environment in Continuous Cropping

HortScience ◽

10.21273/hortsci11442-16 ◽

2017 ◽

Vol 52 (1) ◽

pp. 78-84 ◽

Cited By ~ 6

Author(s):

Lantian Du ◽

Baojian Huang ◽

Nanshan Du ◽

Shirong Guo ◽

Sheng Shu ◽

...

Keyword(s):

Enzyme Activities ◽

Soil Fungi ◽

Soil Enzyme ◽

Community Diversity ◽

Cucumber Plant ◽

Continuous Cropping ◽

Soil Enzyme Activities ◽

Soil Sickness ◽

Relay Intercropping ◽

Microbial Environment

Soil sickness from the continuous cropping of cucumbers has become a major limiting factor for protected cucumber cultivation. The use of reasonable cropping systems and the employment of allelopathy between different crops are considered to be the major safe and effective measures for alleviating soil sickness. The objective of this study assessed the effects of garlic (Allium sativum L. cv. Yusuan No. 1)/cucumber (Cucumis sativus L. cv. Jinchun No. 4) relay intercropping on soil enzyme activities and the microbial environment in a continuous cropping regime. Cucumbers and garlic were selected and planted in plastic barrels. The following four treatments were included in the experiment: continuous cropping without crops (Cont), monoculture cucumbers (C), monoculture garlic (G), and the relay intercropping of garlic with cucumbers (CG). The results showed that relay intercropping with garlic promoted cucumber plant growth and attenuated damage caused by soil sickness. In comparison with the Cont treatment, the C treatment decreased soil urease, catalase, invertase, and phosphatase activities; by contrast, the CG treatment enhanced all soil enzyme activities. The C treatment resulted in lower numbers of soil bacteria and actinomycetes and a lower bacteria/fungi ratio, but there were a higher number of soil fungi than there were in the Cont treatment. However, the CG treatment increased the numbers of soil bacteria and actinomycetes as well as the bacteria/fungi ratio, and it decreased the number of soil fungi. In comparison with the Cont treatment, the C treatment reduced the microbial biomass carbon (MBC) and soil basal respiration (BSR) without affecting the metabolic quotient (qCO2), whereas the CG treatment increased all three variables. A polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE) analysis revealed decreased bacterial community diversity and increased fungal community diversity in soil with the C treatment; the opposite trend was observed in the CG treatment. The results indicated that the relay intercropping of garlic with cucumbers improved soil enzyme activities and promoted the conversion of continuous cropping soil from a “fungal” type to a “bacterial” type. Additionally, relay intercropping altered the soil bacterial community structure, increased the bacterial diversity indices, and enriched the dominant bacterial populations in the soil. These mechanisms improved the soil microbial environment and effectively alleviated damage caused by soil sickness, thus promoting cucumber plant growth.

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