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Xiaoxiao Li
Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization, China University of Mining and Technology, Xuzhou, Jiangsu, 221008, China

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Journal article
Published: 08 May 2021 in Journal of Environmental Management
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To improve grain production capacity, many areas in the world are shifting from rainfed agriculture to irrigated agriculture. One example of such land consolidation is dryland-to-paddy conversion. The conversion of land use pattern largely affects the stability of farmland soil, especially the soil carbon cycle. However, the mutual feedback mechanisms between carbon flux variation and environmental factors during the farmland consolidation process are still poorly known. Located in the Huang-Huai-Hai Plain China, Xuzhou is a typical area where dryland-to-paddy conversion are most widely distributed. Therefore, in this study, we have carried out dryland-to-paddy conversion by setting up two isolated rectangular fields one group planting corn in dryland (DL) and another group planting in paddy field (PF) in Xuzhou. Here, we determined the effect of dryland-to-paddy consolidation on soil CO2 flux in two isolated rectangular fields - the dryland (DL) cultivated with corn and the paddy field (PF) cultivated with rice. Our results showed that the soil carbon flux and temperature followed similar unimodal curves with greater soil CO2 flux of in PF than in DL. Surprisingly, the land conversion significantly reduced soil microbial biomass carbon and easily oxidized organic carbon by 28.55% and 29.09%, respectively. The structural equation modeling results demonstrated that the changes in soil environmental factors, including temperature, and fungal OTU numbers, were the primary drivers for the soil CO2 flux and soil carbon pool (P < 0.05). Overall, this study improves the understanding of the ecological impact of dryland-to-paddy conversion, providing insights into low-carbon agriculture and climate mitigation.

ACS Style

Xiaoxiao Li; Nan Hui; Yongjun Yang; Jing Ma; Zhanbin Luo; Fu Chen. Short-term effects of land consolidation of dryland-to-paddy conversion on soil CO2 flux. Journal of Environmental Management 2021, 292, 112691 .

AMA Style

Xiaoxiao Li, Nan Hui, Yongjun Yang, Jing Ma, Zhanbin Luo, Fu Chen. Short-term effects of land consolidation of dryland-to-paddy conversion on soil CO2 flux. Journal of Environmental Management. 2021; 292 ():112691.

Chicago/Turabian Style

Xiaoxiao Li; Nan Hui; Yongjun Yang; Jing Ma; Zhanbin Luo; Fu Chen. 2021. "Short-term effects of land consolidation of dryland-to-paddy conversion on soil CO2 flux." Journal of Environmental Management 292, no. : 112691.

Journal article
Published: 27 March 2020 in Microorganisms
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Microorganisms are the driving force behind the circulation and transformation of the soil substance. The development of soil bacterial communities is critical for ecosystem restoration and evolution. In the Loess Plateau, coal mining activities have aggravated the deterioration of the fragile local ecological environment. The adaptive development of soil bacterial communities in response to different ecological processes caused by coal mining activities was explored through high-throughput sequencing technology and an ecological network analysis of the mining subsidence area of the Daliuta Coal Mine and vegetation rehabilitation area of the Heidaigou Coal Mine in the Loess Plateau. The results showed that while mining subsidence was inhibited, vegetation rehabilitation promoted the soil physicochemical properties. Soil organic matter, available phosphorus and available potassium in the subsidence area decreased significantly (P < 0.05), while soil organic matter, soil water, pH and EC in the vegetation rehabilitation area increased significantly (P < 0.05). The diversity index in the subsidence area decreased by about 20%, while that in the vegetation rehabilitation area increased by 63%. Mining subsidence and vegetation rehabilitation had a distinct influence on the molecular ecological networks of the soil bacteria, which tended to be more complex after the mining subsidence, and the number of connections in the network increased otherwise significantly enhanced interactive relationships. After the vegetation rehabilitation, the number of modules in the ecological network increased, but the contents of modules tended to be simpler. Soil bacterial communities adapted to the changes by changing the relationships between bacteria in response to different ecological processes. This study provides new insights into the monitoring and abatement of the damaged ecological environment in mines.

ACS Style

Zhanbin Luo; Jing Ma; Fu Chen; Xiaoxiao Li; Qi Zhang; Yongjun Yang. Adaptive Development of Soil Bacterial Communities to Ecological Processes Caused by Mining Activities in the Loess Plateau, China. Microorganisms 2020, 8, 477 .

AMA Style

Zhanbin Luo, Jing Ma, Fu Chen, Xiaoxiao Li, Qi Zhang, Yongjun Yang. Adaptive Development of Soil Bacterial Communities to Ecological Processes Caused by Mining Activities in the Loess Plateau, China. Microorganisms. 2020; 8 (4):477.

Chicago/Turabian Style

Zhanbin Luo; Jing Ma; Fu Chen; Xiaoxiao Li; Qi Zhang; Yongjun Yang. 2020. "Adaptive Development of Soil Bacterial Communities to Ecological Processes Caused by Mining Activities in the Loess Plateau, China." Microorganisms 8, no. 4: 477.

Journal article
Published: 19 March 2020 in Microorganisms
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Understanding the interactions of soil microbial species and how they responded to disturbances are essential to ecological restoration and resilience in the semihumid and semiarid damaged mining areas. Information on this, however, remains unobvious and deficiently comprehended. In this study, based on the high throughput sequence and molecular ecology network analysis, we have investigated the bacterial distribution in disturbed mining areas across three provinces in China, and constructed molecular ecological networks to reveal the interactions of soil bacterial communities in diverse locations. Bacterial community diversity and composition were classified measurably between semihumid and semiarid damaged mining sites. Additionally, we distinguished key microbial populations across these mining areas, which belonged to Proteobacteria, Acidobacteria, Actinobacteria, and Chloroflexi. Moreover, the network modules were significantly associated with some environmental factors (e.g., annual average temperature, electrical conductivity value, and available phosphorus value). The study showed that network interactions were completely different across the different mining areas. The keystone species in different mining areas suggested that selected microbial communities, through natural successional processes, were able to resist the corresponding environment. Moreover, the results of trait-based module significances showed that several environmental factors were significantly correlated with some keystone species, such as OTU_8126 (Acidobacteria), OTU_8175 (Burkholderiales), and OTU_129 (Chloroflexi). Our study also implied that the complex network of microbial interaction might drive the stand resilience of soil bacteria in the semihumid and semiarid disturbed mining areas.

ACS Style

Jing Ma; Yongqiang Lu; Fu Chen; Xiaoxiao Li; Dong Xiao; Hui Wang. Molecular Ecological Network Complexity Drives Stand Resilience of Soil Bacteria to Mining Disturbances among Typical Damaged Ecosystems in China. Microorganisms 2020, 8, 433 .

AMA Style

Jing Ma, Yongqiang Lu, Fu Chen, Xiaoxiao Li, Dong Xiao, Hui Wang. Molecular Ecological Network Complexity Drives Stand Resilience of Soil Bacteria to Mining Disturbances among Typical Damaged Ecosystems in China. Microorganisms. 2020; 8 (3):433.

Chicago/Turabian Style

Jing Ma; Yongqiang Lu; Fu Chen; Xiaoxiao Li; Dong Xiao; Hui Wang. 2020. "Molecular Ecological Network Complexity Drives Stand Resilience of Soil Bacteria to Mining Disturbances among Typical Damaged Ecosystems in China." Microorganisms 8, no. 3: 433.

Journal article
Published: 15 January 2020 in International Journal of Environmental Research and Public Health
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Irrigation has been applied on a large scale for the improvement of grain yield per hectare and production stability. However, the dryland-to-paddy conversion affects the ecological environment of areas of long-term dry farming, especially soil microorganisms. Little attention has been paid to the changes in microbial communities and the interactions between their populations in this process. Therefore, in this paper, the compositions and diversity of soil bacterial and fungal communities were explored through a combination of high-throughput sequencing technology and molecular ecological network methods using bacterial 16S rRNA and fungal ITS. The results showed that: (1) both the abundance and diversity of soil bacteria and fungi decreased in a short time, and the abundance of Actinobacteria, Firmicutes and Olpidiomycota varied greatly. (2) Compared to dry land, the modular structure of interaction networks and interspecific relationships of bacterial and fungal communities in paddy soil were simpler, and the network became more unstable. A cooperative relationship dominated in the molecular ecological network of bacteria, while a competitive relationship was dominant in the network of fungi. Actinobacteria and Firmicutes were the dominant bacterial species in dry land and paddy field, respectively. Ascomycota was dominant in the fungal communities of both dry land and paddy field. (3) The change in soil environmental factors, such as pH, electrical conductivity (EC), organic matter (OM) and available potassium (AK), directly affected the soil microbial community structure, showing a significant correlation (p < 0.05). These environmental factors also influenced the dominant microbial species. Microorganisms are the most important link in the carbon and nitrogen cycles of soil, and a large-scale dryland-to-paddy conversion may reduce the ecological stability of regional soil.

ACS Style

Xiaoxiao Li; Qi Zhang; Jing Ma; Yongjun Yang; Yifei Wang; Chen Fu. Flooding Irrigation Weakens the Molecular Ecological Network Complexity of Soil Microbes during the Process of Dryland-to-Paddy Conversion. International Journal of Environmental Research and Public Health 2020, 17, 561 .

AMA Style

Xiaoxiao Li, Qi Zhang, Jing Ma, Yongjun Yang, Yifei Wang, Chen Fu. Flooding Irrigation Weakens the Molecular Ecological Network Complexity of Soil Microbes during the Process of Dryland-to-Paddy Conversion. International Journal of Environmental Research and Public Health. 2020; 17 (2):561.

Chicago/Turabian Style

Xiaoxiao Li; Qi Zhang; Jing Ma; Yongjun Yang; Yifei Wang; Chen Fu. 2020. "Flooding Irrigation Weakens the Molecular Ecological Network Complexity of Soil Microbes during the Process of Dryland-to-Paddy Conversion." International Journal of Environmental Research and Public Health 17, no. 2: 561.

Journal article
Published: 04 December 2019 in International Journal of Environmental Research and Public Health
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Soil microorganisms play a key role in global biogeochemical changes. To understand the interactions among soil bacterial communities and their responses to extreme environments, the soil properties and bacterial community diversity were determined in the post-mining ecosystem of the Loess Plateau, China. The results showed that the soil temperature, pH, organic matter, available phosphorus, and available potassium values were significantly reduced in the post-mining cracks area. However, the richness and uniformity of soil bacterial communities increased by about 50% in the post-mining cracks area. Soil microbial community structure and the network interactions tended to be complex and strengthened in the post-mining cracks area. Moreover, soil nutrient loss caused the differences in soil bacterial community structure compositions in the post-mining cracks area. Furthermore, the relationships between soil physicochemical properties and different modules of the soil bacterial molecular ecological network were changed in a complex manner in the post-mining cracks area. This study provides a theoretical basis for adaptive management and response to cracks in post-mining areas and under other extreme conditions.

ACS Style

Zhanbin Luo; Jing Ma; Fu Chen; Xiaoxiao Li; Huping Hou; Shaoliang Zhang. Cracks Reinforce the Interactions among Soil Bacterial Communities in the Coal Mining Area of Loess Plateau, China. International Journal of Environmental Research and Public Health 2019, 16, 4892 .

AMA Style

Zhanbin Luo, Jing Ma, Fu Chen, Xiaoxiao Li, Huping Hou, Shaoliang Zhang. Cracks Reinforce the Interactions among Soil Bacterial Communities in the Coal Mining Area of Loess Plateau, China. International Journal of Environmental Research and Public Health. 2019; 16 (24):4892.

Chicago/Turabian Style

Zhanbin Luo; Jing Ma; Fu Chen; Xiaoxiao Li; Huping Hou; Shaoliang Zhang. 2019. "Cracks Reinforce the Interactions among Soil Bacterial Communities in the Coal Mining Area of Loess Plateau, China." International Journal of Environmental Research and Public Health 16, no. 24: 4892.

Journal article
Published: 04 October 2019 in Agriculture
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Land consolidation of dryland-to-paddy conversion for improving tillage conditions and grain production capacity is widely implemented throughout the world. The conversion affects soil ecological stability, especially the most active soil microorganisms. However, the impacts of the dryland-to-paddy conversion has paid little attention in recent decades. In this study, a pot experiment was used to explore the responses of the microbial community and their interactions with soil properties after rice in the first season (five months). The results indicated that a significant decrease in the topsoil pH, organic matter content, nitrate nitrogen, and ammonical nitrogen, and an increase in soil electrical conductivity (EC) was observed (p < 0.05) after the dryland-to-paddy conversion. The richness and diversity of bacteria and fungi decreased in the short term. The composition of the soil microbial community and the soil microbial dominant bacteria had considerably changed after the conversion. Actinobacteria, Firmicutes, and Olpidiomycota were found to be highly sensitive to the dryland-to-paddy conversion. The soil microbial community structure had extremely significant positive correlations with soil pH, EC, organic matter, nitrate nitrogen, and ammonical nitrogen (p < 0.05). Microorganisms are the most important component of soil nutrient cycling. Converting a large area of dryland to paddy may lead to an imbalance in the soil carbonitride cycle and should be further examined in North China.

ACS Style

Xiaoxiao Li; Jing Ma; Yongjun Yang; Huping Hou; Gang-Jun Liu; Fu Chen. Short-Term Response of Soil Microbial Community to Field Conversion from Dryland to Paddy under the Land Consolidation Process in North China. Agriculture 2019, 9, 216 .

AMA Style

Xiaoxiao Li, Jing Ma, Yongjun Yang, Huping Hou, Gang-Jun Liu, Fu Chen. Short-Term Response of Soil Microbial Community to Field Conversion from Dryland to Paddy under the Land Consolidation Process in North China. Agriculture. 2019; 9 (10):216.

Chicago/Turabian Style

Xiaoxiao Li; Jing Ma; Yongjun Yang; Huping Hou; Gang-Jun Liu; Fu Chen. 2019. "Short-Term Response of Soil Microbial Community to Field Conversion from Dryland to Paddy under the Land Consolidation Process in North China." Agriculture 9, no. 10: 216.

Journal article
Published: 27 March 2019 in Sustainability
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Electronic waste (e-waste) represents a severe global environmental issue due to the fast upgrading and updating of electronic products and the high environmental risk. Current low recycling technology, high economic cost, and weak disposal capability make it difficult for e-waste to be rendered 100% harmless. E-waste disposal requires new site-selection methods and site-saving technology to take into account the loss of public perceived value. This study attempts to improve e-waste disposal through siting and landscaping to reduce perceived value loss. The first step is to determine the minimum distance for landfill siting by surveying the minimum loss of perceived value and to use the geographic information system (GIS) to sketch the suitable landfill site thereafter. To optimize the landfill landscape, a landscape infrastructure and its filling process have been designed to reduce the environmental risk and ensure future reuse potential. The application case showed that the minimum distance is 521 m, which was sensitive to the educational level and occupation of residents. The key to landfill landscaping is the construction of isolation layers and the integration of the landfill and urban landscape. The method described in this paper is characterized by minimizing the perceived loss of value to the public, reducing environmental risks, and preserving the resource value of e-waste. This design could provide an alternative to current electronic waste processing methods.

ACS Style

Fu Chen; Xiaoxiao Li; Yongjun Yang; Huping Hou; Gang-Jun Liu; Shaoliang Zhang. Storing E-waste in Green Infrastructure to Reduce Perceived Value Loss through Landfill Siting and Landscaping: A Case Study in Nanjing, China. Sustainability 2019, 11, 1829 .

AMA Style

Fu Chen, Xiaoxiao Li, Yongjun Yang, Huping Hou, Gang-Jun Liu, Shaoliang Zhang. Storing E-waste in Green Infrastructure to Reduce Perceived Value Loss through Landfill Siting and Landscaping: A Case Study in Nanjing, China. Sustainability. 2019; 11 (7):1829.

Chicago/Turabian Style

Fu Chen; Xiaoxiao Li; Yongjun Yang; Huping Hou; Gang-Jun Liu; Shaoliang Zhang. 2019. "Storing E-waste in Green Infrastructure to Reduce Perceived Value Loss through Landfill Siting and Landscaping: A Case Study in Nanjing, China." Sustainability 11, no. 7: 1829.

Journal article
Published: 29 August 2018 in Sustainability
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China has widely implemented land consolidation, which was expected to increase the amount of cultivated land and enhance grain yields. Key components of land consolidation include filling mall waterbodies and leveling land, both of which have strong impacts on the environment in the Yangtze River Delta. The impacts of land consolidation on soil ecology and agricultural production are not yet clear. Here, we conducted a field survey of soil properties and rice growth to detect the effects of land consolidation in the first growing season. The normalized difference vegetation index (NDVI) was used to analyze the remote sensing data. We found significant differences in the soil properties under different types of land leveling, with a general NDVI pattern of: control > borrowed topsoil area > filled waterbodies area > topsoil cutting area. We found significant heterogeneity in rice NDVI after land consolidation. The NDVI of rice had extremely significant positive correlations with soil organic matter and available zinc. The spatial variation in soil properties caused by land consolidation was a dominant factor leading to the heterogeneity of rice NDVI. Fertilizing soil and strengthening field management should be adopted to provide more ecological services while increasing quantity.

ACS Style

Xiaoxiao Li; Man Yu; Jing Ma; Zhanbin Luo; Fu Chen; Yongjun Yang. Identifying the Relationship between Soil Properties and Rice Growth for Improving Consolidated Land in the Yangtze River Delta, China. Sustainability 2018, 10, 3072 .

AMA Style

Xiaoxiao Li, Man Yu, Jing Ma, Zhanbin Luo, Fu Chen, Yongjun Yang. Identifying the Relationship between Soil Properties and Rice Growth for Improving Consolidated Land in the Yangtze River Delta, China. Sustainability. 2018; 10 (9):3072.

Chicago/Turabian Style

Xiaoxiao Li; Man Yu; Jing Ma; Zhanbin Luo; Fu Chen; Yongjun Yang. 2018. "Identifying the Relationship between Soil Properties and Rice Growth for Improving Consolidated Land in the Yangtze River Delta, China." Sustainability 10, no. 9: 3072.

Conference paper
Published: 02 August 2018 in IOP Conference Series: Materials Science and Engineering
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The purpose of this paper is to improve the rural mining area's ecological environment and promote the rural mining area's sustainable development. From the perspective of rural revitalization, combining the essential connotation of the "resource-curse hypothesis", this paper analyzes the nature of rural recession in China's mining areas, and points out the problem that current mining area's management mode is lack of economic considerations, meanwhile the land re-use mode is inappropriate and the farmers in mining areas are not being resettled. From the perspective of rural revitalization strategy, it puts forward new requirements for the future implementation of ecological rehabilitation of mining areas. It is recommended that natural resource accounting system be adopted as an assessment mechanism, and that the "population-land-industry" rural development should be the core to carry out the construction of the ecological civilization of the mining area and the construction of farmers' rights and legal systems to realize the tranformation from the ecological improvement to ecological restoration in the mining areas.

ACS Style

Siyan Zeng; Fu Chen; Xiaoxiao Li; Zhanbin Luo; Shaojin Hao. Rethinking the Ecological Restoration of Mining Areas from the Perspective of Rural Revitalization. IOP Conference Series: Materials Science and Engineering 2018, 392, 042035 .

AMA Style

Siyan Zeng, Fu Chen, Xiaoxiao Li, Zhanbin Luo, Shaojin Hao. Rethinking the Ecological Restoration of Mining Areas from the Perspective of Rural Revitalization. IOP Conference Series: Materials Science and Engineering. 2018; 392 (4):042035.

Chicago/Turabian Style

Siyan Zeng; Fu Chen; Xiaoxiao Li; Zhanbin Luo; Shaojin Hao. 2018. "Rethinking the Ecological Restoration of Mining Areas from the Perspective of Rural Revitalization." IOP Conference Series: Materials Science and Engineering 392, no. 4: 042035.

Journal article
Published: 20 May 2018 in International Journal of Environmental Research and Public Health
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Secondary lead smelting is a widespread industrial activity which has exacerbated Pb or Cd contamination of soil and water across the world. Soil physicochemical properties, soil enzyme activities, heavy metal concentrations, and bacterial diversity near a secondary lead plant in Xuzhou, China were examined in this study. The results showed that secondary lead smelting activities influenced nearby soils. Soil acidification decreased one order of magnitude, with a mean value of 7.3. Soil organic matter also showed a downward trend, while potassium and nitrogen appeared to accumulate. Soil urease and protease activity increased in samples with greater heavy metal pollution, but overall the soil microbial biodiversity decreased. Soil heavy metal concentration—especially Pb and Cd—greatly exceeded the concentrations of Chinese Environmental Quality Standard for Soils (GB 15618-1995). Some environmental factors—such as pH, organic matter, enzyme activity, and the concentration of heavy metals—significantly affected bacterial diversity: compared with the control site, the Chao1 estimator decreased about 50%, while the Shannon diversity index dropped approximately 20%. Moreover, some genera have significant relationships with heavy metal concentration—such as Ramlibacter with Zn and Steroidobacter with Cd—which might act as bio-indicators for soil remediation. These results will provide a new insight in the future for reclaiming soil contaminants caused by secondary lead smelting.

ACS Style

Zhanbin Luo; Jing Ma; Fu Chen; Xiaoxiao Li; Shaoliang Zhang. Effects of Pb Smelting on the Soil Bacterial Community near a Secondary Lead Plant. International Journal of Environmental Research and Public Health 2018, 15, 1030 .

AMA Style

Zhanbin Luo, Jing Ma, Fu Chen, Xiaoxiao Li, Shaoliang Zhang. Effects of Pb Smelting on the Soil Bacterial Community near a Secondary Lead Plant. International Journal of Environmental Research and Public Health. 2018; 15 (5):1030.

Chicago/Turabian Style

Zhanbin Luo; Jing Ma; Fu Chen; Xiaoxiao Li; Shaoliang Zhang. 2018. "Effects of Pb Smelting on the Soil Bacterial Community near a Secondary Lead Plant." International Journal of Environmental Research and Public Health 15, no. 5: 1030.

Journal article
Published: 25 April 2018 in Sustainability
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Source-separated policy is very important for household solid waste (HSW) management in global megacities. The low proportion of source-separated collection has led to a low comprehensive utilization rate of municipal solid waste (MSW) in China. In March 2017, the Chinese government required major cities to fully implement compulsory source-separated systems by 2020. To determine policy impacts and efficiency in improving HSW sorting, the government launched a mandatory MSW source-separated program in Nanjing in November 2016. A household survey was implemented in three types of 11 communities over a period of 10 weeks. The results showed that approximately 52% of the respondents supported the mandatory policy and that household size was the most important sociodemographic factor influencing the support of the source separation policy. Income, gender, age, and knowledge play significant roles in different groups of respondents. This mandatory policy effectively improved the source-separated rate of HSW by 49.7%. Source-separated facilities investment, publicity investment, and special supervision coverage in these communities had significant positive effects on source-separated HSW. Every 1 million CNY investment in source-separated facilities and publicity will increase the source-separated rate of HSW by 1.1%. A 1.0% increase of special supervision coverage in communities can increase the source-separated rate by 3.6%. The findings from this study may help improve source-separated management of HSW for other cities in the future.

ACS Style

Fu Chen; Xiaoxiao Li; Jing Ma; Yongjun Yang; Gang-Jun Liu. An Exploration of the Impacts of Compulsory Source-Separated Policy in Improving Household Solid Waste-Sorting in Pilot Megacities, China: A Case Study of Nanjing. Sustainability 2018, 10, 1327 .

AMA Style

Fu Chen, Xiaoxiao Li, Jing Ma, Yongjun Yang, Gang-Jun Liu. An Exploration of the Impacts of Compulsory Source-Separated Policy in Improving Household Solid Waste-Sorting in Pilot Megacities, China: A Case Study of Nanjing. Sustainability. 2018; 10 (5):1327.

Chicago/Turabian Style

Fu Chen; Xiaoxiao Li; Jing Ma; Yongjun Yang; Gang-Jun Liu. 2018. "An Exploration of the Impacts of Compulsory Source-Separated Policy in Improving Household Solid Waste-Sorting in Pilot Megacities, China: A Case Study of Nanjing." Sustainability 10, no. 5: 1327.