Soil microbial activity and nutrients of evergreen broad-leaf forests in mid-subtropical region of China

Zeng, Zhiyong; Wang, Silong; Zhang, Canming; Tang, Hong; Li, Xiquan; Wu, Zhaofei; Luo, Jiafa

doi:10.1007/s11676-015-0060-x

Cited by 6 publications

(6 citation statements)

References 27 publications

(24 reference statements)

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“…In this study, the highest soil MBC content was found in CBMF. This result agreed with the conclusion of Zeng et al (2015). The MBC content correlated positively with the SOC content (Figure 6), which is considered as a labile organic carbon pool (Liang et al, 2011).…”

Section: Discussionsupporting

confidence: 94%

Soil bacterial community structure and co‐occurrence networks in response to the succession of secondary forests in subtropical regions

Qian,

Tang,

et al. 2024

Land Degrad Dev

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A large amount of secondary successional vegetation (subtropical evergreen broadleaved forests) has formed after the extensive deforestation and cultivation of coniferous forests in Wuyi Mountain, Southeast China. However, we lack a detailed understanding of the dynamic changes in microbial community structure and its co‐occurrence network during succession. The features that are responsible for alterations in the soil bacterial community remain poorly defined. Therefore, we compared the soil physicochemical properties, enzyme activities, and bacterial diversity among three different forests (a coniferous forest [CF], early stage of succession; a mixed conifer‐broadleaf forest [CBMF], middle stage of succession; an evergreen broadleaf forest [EBF]; late stage of succession). Results indicated that the contents of soil organic carbon and microbial biomass carbon (MBC) in CBMF were higher compared with those in CF. The alpha diversity indices were the highest in CBMF. Functional annotation of prokaryotic taxa predicted the relative abundances of chemoheterotrophy and aerobic chemoheterotrophy were lower in CF than in the other two forests. Bacterial network topology was affected by forest succession, with CBMF having more complex bacterial networks. Mantel's test indicated the soil nitrate nitrogen content (P = 0.03) was the most important property that shaped the bacterial community composition, bacterial diversity was influenced by soil pH (P = 0.026), and the contents of available phosphorus (P = 0.04) and MBC (P = 0.022) during the succession process. In conclusion, the succession of secondary forests promoted soil nutrient accumulation and improved bacterial diversity and network complexity.

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Section: Discussionsupporting

confidence: 94%

Soil bacterial community structure and co‐occurrence networks in response to the succession of secondary forests in subtropical regions

Qian,

Tang,

et al. 2024

Land Degrad Dev

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“…q CO 2 refers to the ratio between the soil BR and MBC [ 34 ]. This parameter not only represents the size and activity of microbial biomass, but also indicates the maturity of the soil ecosystem [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

“…q CO 2 organically links the size of the microbial biomass with the biological activity and function of the microbial community [ 32 , 34 ]. This parameter can reveal the physiological characteristics of a microbial community [ 21 , 33 ].…”

Section: Discussionmentioning

confidence: 99%

“…This parameter can reveal the physiological characteristics of a microbial community [ 21 , 33 ]. Previous studies reported that low q CO 2 indicates the high carbon utilization efficiency of a soil microbial community [ 34 , 49 ]. By contrast, high q CO 2 indicates that a relatively low proportion of carbon is being used for microbial cell synthesis and, therefore, there is a low utilization efficiency of the carbon source [ 35 ].…”

Section: Discussionmentioning

confidence: 99%

“…On the other hand, this treatment promoted the mass propagation of microbes and increased microbial activities, leading to a significant increase in microbial biomass [ 51 – 52 ]. Therefore, the utilization efficiency of the carbon source was improved [ 34 ]. Furthermore, root pruning inevitably disturbs the old growth balances of trees and alters their assimilation abilities, nutrient distributions and the root environment, resulting in different effects on growth.…”

Section: Discussionmentioning

confidence: 99%

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Effects of root pruning on the physicochemical properties and microbial activities of poplar rhizosphere soil

et al. 2017

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This study aimed to determine the effects of root pruning on the physicochemical characteristics and microbial activities of poplar rhizosphere soil. The root systems of 5-year-old poplar (Populus×euramericana cv. ‘Neva’) trees were manually pruned at 6, 8, or 10 times diameter at breast height (DBH) from the trunk (severe, moderate, and light, respectively) along both inter-row sides. Moderate root pruning significantly increased the concentrations of amino acids, organic acids, and total sugars in the root exudates and decreased the pH of rhizosphere soil. This treatment also increased the contents of available nitrogen, phosphorus, potassium, and total organic carbon as well as high-, medium-, and low-activity organic carbon in rhizosphere soil. Moreover, moderate pruning increased the contents of microbial biomass carbon and nitrogen, and enhanced basal respiration, in addition to decreasing the metabolic quotients in rhizosphere soil by 8.9%, 5.0%, and 11.4% compared with control, light, and severe root pruning treatments, respectively. Moderate pruning increased the growth rates of DBH, tree height, and volume to the highest levels. Furthermore, these indices were not significantly different between the light root pruning and control groups, but varied significantly between severe and moderate root-pruning treatments. Thus, root pruning, depending on the distance from the trunk, significantly influences the physicochemical properties and microbial activities in poplar rhizosphere soil.

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Effect of rice straw application on microbial community and activity in paddy soil under different water status

Pan

Chapman

et al. 2015

Environ Sci Pollut Res

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Rice straw application and flooding are common practices in rice production, both of which can induce changes in the microbial community. This study used soil microcosms to investigate the impact of water status (saturated and nonsaturated) and straw application (10 g kg(-1) soil) on soil microbial composition (phospholipid fatty acid analysis) and activity (MicroResp(™) method). Straw application significantly increased total PLFA amount and individual PLFA components independent of soil moisture level. The amount of soil fungal PLFA was less than Gram-negative, Gram-positive, and actinomycete PLFA, except the drained treatment with rice straw application, which had higher fungal PLFA than actinomycete PLFA at the initial incubation stage. Straw amendment and waterlogging had different effects on microbial community structure and substrate-induced pattern. PLFA profiles were primarily influenced by straw application, whereas soil water status had the greater influence on microbial respiration. Of the variation in PLFA and respiration data, straw accounted for 30.1 and 16.7 %, while soil water status explained 7.5 and 29.1 %, respectively. Our results suggest that (1) the size of microbial communities in paddy soil is more limited by carbon substrate availability rather than by the anaerobic conditions due to waterlogging and (2) that soil water status is more important as a control of fungal growth and microbial community activity.

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Soil microbial activity and nutrients of evergreen broad-leaf forests in mid-subtropical region of China

Cited by 6 publications

References 27 publications

Soil bacterial community structure and co‐occurrence networks in response to the succession of secondary forests in subtropical regions

Soil bacterial community structure and co‐occurrence networks in response to the succession of secondary forests in subtropical regions

Effects of root pruning on the physicochemical properties and microbial activities of poplar rhizosphere soil

Effect of rice straw application on microbial community and activity in paddy soil under different water status

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