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Yanjiang Zhang
College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China

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Journal article
Published: 29 August 2021 in Diversity
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Streptomycespartum Act12 and Streptomyces roche D74 are biocontrol strains that can promote plant growth and enhance stress resistance in different crops. However, their effects on the rhizosphere microbiome and the role of the reassembled microbiome in plant growth promotion and stress resistance enhancement remain unclear. This study investigated the variation in the rhizosphere microbiome induced by Streptomyces application through a cucumber (Cucumis sativus L. cv. “Youliang”) pot experiment. The bacterial and fungal communities of rhizosphere soils inoculated with and without Streptomyces were, respectively, compared based on 16S rRNA and internal transcribed spacer rRNA gene sequences. Following Streptomyces application, the bacterial alpha diversity increased significantly, while the fungal alpha diversity exhibited the opposite trend. The bacterial and fungal communities’ compositions clearly shifted in the inoculated soil. Compared with the uninoculated control, the relative abundance of the genus Streptomyces increased by 68.3%, and the bacterial co-occurrence network in the rhizosphere soil was enriched significantly. The relative abundance of bacteria associated with nitrogen fixation was increased by 7.5% following Streptomyces application. Based on the results of this study, we conclude that the application of Streptomyces Act12 and D74 can be used to reassemble and optimize the rhizosphere microbiome of cucumber, which is conducive to plant survival.

ACS Style

Yanjiang Zhang; Tian Zhang; Zhijing Xue; Yifan Liu; Yongzhe Li; Yulong Li; Qin Chen. Streptomyces Application Triggers Reassembly and Optimization of the Rhizosphere Microbiome of Cucumber. Diversity 2021, 13, 413 .

AMA Style

Yanjiang Zhang, Tian Zhang, Zhijing Xue, Yifan Liu, Yongzhe Li, Yulong Li, Qin Chen. Streptomyces Application Triggers Reassembly and Optimization of the Rhizosphere Microbiome of Cucumber. Diversity. 2021; 13 (9):413.

Chicago/Turabian Style

Yanjiang Zhang; Tian Zhang; Zhijing Xue; Yifan Liu; Yongzhe Li; Yulong Li; Qin Chen. 2021. "Streptomyces Application Triggers Reassembly and Optimization of the Rhizosphere Microbiome of Cucumber." Diversity 13, no. 9: 413.

Journal article
Published: 13 March 2020 in Sustainability
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Spatial distribution of soil organic carbon (SOC) is important for the development of ecosystem carbon cycle models and assessment of soil quality. In this study, a total of 732 soil samples from 122 soil profiles (0–10, 10–20, 20–40, 40–60, 60–80, and 80–100 cm) were collected by a combination of fixed-point sampling and route surveys in an agro-pastoral ecotone of northern China and the spatial variation of the SOC in the samples was analyzed through classical statistical and geostatistical approaches. The results showed that the SOC contents decreased from 4.31 g/kg in the 0–10 cm to 1.57 g/kg in the 80–100 cm soil layer. The spatial heterogeneity of the SOC exhibited moderate and strong dependence for all the soil layers owing to random and structural factors including soil texture, topography, and human activities. The spatial distributions of the SOC increased gradually from northeast to southwest in the 0–40 cm soil layers, but there was no general trend in deep soil layers and different interpolation methods resulted in the inconsistent spatial distribution of SOC. The storage of SOC was expected to be 25 Tg in the 0–100 cm soil depths for the whole area of 7692 km2. The SOC stocks estimated by two interpolation approaches were very close (25.65 vs. 25.86 Tg), but the inverse distance weighting (IDW) interpolation generated a more detailed map of SOC and with higher determination coefficient (R2); therefore, the IDW was recognized as an appropriate method to investigate the spatial variability of SOC in this region.

ACS Style

Yanjiang Zhang; Qing Zhen; Pengfei Li; Yongxing Cui; Junwei Xin; Yuan Yuan; Zhuhua Wu; Xingchang Zhang. Storage of Soil Organic Carbon and Its Spatial Variability in an Agro-Pastoral Ecotone of Northern China. Sustainability 2020, 12, 2259 .

AMA Style

Yanjiang Zhang, Qing Zhen, Pengfei Li, Yongxing Cui, Junwei Xin, Yuan Yuan, Zhuhua Wu, Xingchang Zhang. Storage of Soil Organic Carbon and Its Spatial Variability in an Agro-Pastoral Ecotone of Northern China. Sustainability. 2020; 12 (6):2259.

Chicago/Turabian Style

Yanjiang Zhang; Qing Zhen; Pengfei Li; Yongxing Cui; Junwei Xin; Yuan Yuan; Zhuhua Wu; Xingchang Zhang. 2020. "Storage of Soil Organic Carbon and Its Spatial Variability in an Agro-Pastoral Ecotone of Northern China." Sustainability 12, no. 6: 2259.

Journal article
Published: 06 May 2019 in Sustainability
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Carbon dioxide (CO2) flux provides feedback between C cycling and the climatic system. There is considerable uncertainty regarding the direction and magnitude of the responses of this process to precipitation changes, hindering accurate prediction of C cycling in a changing world. We examined the responses of ecosystem CO2 flux to ambient precipitation and experimentally decreased (−35%) and increased precipitation (+20%) in a semiarid grassland in China between July 2013 and September 2015. The measured CO2 flux components included the gross ecosystem productivity (GEP), net ecosystem CO2 exchange (NEE), ecosystem respiration (Re), and soil respiration (Rs). The results showed that the seasonal and diurnal patterns of most components of ecosystem CO2 flux were minimally affected by precipitation treatments, with less than 4% changes averaged across the three growing seasons. GEP and NEE had a quadratic relationship, while Re and Rs increased exponentially with soil temperature. GEP, RE, and Rs, however, decreased with soil moisture. Decreased precipitation reduced the dependence of CO2 flux on soil temperature but partly increased the dependence on soil moisture; in contrast, increased precipitation had the opposite influence. Our results suggested a relatively stable CO2 flux in this semiarid grassland across the tested precipitation regimes.

ACS Style

Kaiqiang Bao; Haifeng Tian; Min Su; Liping Qiu; Xiaorong Wei; Yanjiang Zhang; Jian Liu; Hailong Gao; Jimin Cheng. Stability of Ecosystem CO2 Flux in Response to Changes in Precipitation in a Semiarid Grassland. Sustainability 2019, 11, 2597 .

AMA Style

Kaiqiang Bao, Haifeng Tian, Min Su, Liping Qiu, Xiaorong Wei, Yanjiang Zhang, Jian Liu, Hailong Gao, Jimin Cheng. Stability of Ecosystem CO2 Flux in Response to Changes in Precipitation in a Semiarid Grassland. Sustainability. 2019; 11 (9):2597.

Chicago/Turabian Style

Kaiqiang Bao; Haifeng Tian; Min Su; Liping Qiu; Xiaorong Wei; Yanjiang Zhang; Jian Liu; Hailong Gao; Jimin Cheng. 2019. "Stability of Ecosystem CO2 Flux in Response to Changes in Precipitation in a Semiarid Grassland." Sustainability 11, no. 9: 2597.

Journal article
Published: 17 April 2019 in Sustainability
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Soil microbes are the main driving forces and influencing factors of biochemical reactions in the environment. Study of ecological recovery after mining activities has prompted wider recognition of the importance of microbial diversity to ecosystem recovery; however, the response of soil bacterial communities to vegetation restoration types and soil biochemical properties remains poorly understood. The purpose of this research was to explore the soil bacterial communities and soil biochemical properties at four sampling sites (brushland (BL), forestland (FL), grassland (GL) and unreclaimed land (UL)) on the Loess Plateau, China, to evaluate the effect of vegetation restoration on the reconstructed soil in mining areas. In August 2017, samples were collected at the Heidaigou coal mine dumps. Illumina MiSeq sequencing was used to identify the structure of the soil bacterial community and evaluate its relationships with soil biochemical properties. The results showed that soil biochemical properties (soil organic matter, available phosphorus, urease, sucrase, microbial biomass carbon and microbial biomass nitrogen) were significantly increased in BL, FL and GL relative to UL, indicating that the soil quality was significantly improved by vegetation restoration. In addition, the results showed that the vegetation restoration on the reconstructed soil in the mining area could significantly improve the operational taxonomic units (OTUs), abundance (ACE and Chao1) and diversity (Shannon and Simpson) indices of bacterial community and the dominant phyla were Proteobacteria, Actinobacteria and Acidobacteria. With vegetation restoration, the relative abundance of Proteobacteria and Acidobacteria showed an increasing trend, while that of Actinobacteria showed a decreasing trend, and the dominant phyla were only significantly correlated with a few biochemical properties. Moreover, there were no changes in soil bacterial community structures across the four sampling sites and the response of the bacterial community to biochemical properties was not obvious. This implies that, although the region has experienced about 20 years of vegetation restoration, the microbial community still maintains good stability and lagging response to soil biochemical properties. Since the BL soil had better biochemical properties and higher bacterial richness and diversity, it was recommended as the optimum vegetation restoration type for soil reclamation in this area.

ACS Style

Pengfei Li; Xingchang Zhang; Mingde Hao; Yongxing Cui; Shilei Zhu; Yanjiang Zhang. Effects of Vegetation Restoration on Soil Bacterial Communities, Enzyme Activities, and Nutrients of Reconstructed Soil in a Mining Area on the Loess Plateau, China. Sustainability 2019, 11, 2295 .

AMA Style

Pengfei Li, Xingchang Zhang, Mingde Hao, Yongxing Cui, Shilei Zhu, Yanjiang Zhang. Effects of Vegetation Restoration on Soil Bacterial Communities, Enzyme Activities, and Nutrients of Reconstructed Soil in a Mining Area on the Loess Plateau, China. Sustainability. 2019; 11 (8):2295.

Chicago/Turabian Style

Pengfei Li; Xingchang Zhang; Mingde Hao; Yongxing Cui; Shilei Zhu; Yanjiang Zhang. 2019. "Effects of Vegetation Restoration on Soil Bacterial Communities, Enzyme Activities, and Nutrients of Reconstructed Soil in a Mining Area on the Loess Plateau, China." Sustainability 11, no. 8: 2295.