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380 results on '"Zhao, Minjuan"'

107. The Evolution of Factors Influencing Green Technological Progress in Terms of Carbon Reduction: A Spatial-Temporal Tactic Within Agriculture Industries of China

Author

Apurbo Sarkar, Zhao Minjuan, Lu Qian, Deng Yue, and Cui Yu

Subjects
green technological progress, Sustainable development, Economics and Econometrics, Food security, Agricultural machinery, Natural resource economics, business.industry, Technological change, Renewable Energy, Sustainability and the Environment, Energy Engineering and Power Technology, temporal and spatial evolution, carbon emission reduction potential, General Works, Fuel Technology, Agriculture, Urbanization, Greenhouse gas, Environmental science, influence factor, business, China, carbon reduction
Abstract

The impacts of widespread carbon emission trends possessed tremendous pressure for global food security, sustainable development, and ecosystems. Several temporal and spatial patterns of green technology have been adopted to reduce carbon emissions in different regions of China. In China, agriculture industries may have colossal importance for reducing carbon emissions. On the basis of the data from 1998 to 2018, the study uses the heterogeneous stochastic frontier model to quantify the carbon emission reduction potential of agricultural green technology progress in eastern, central, and western regions of China by using the heterogeneous stochastic frontier model. We also analyze the coefficient of variation and its spatial and temporal evolution pattern of carbon intensity decline potential index and explore the potential factors related to the agriculture green technology progress of China. The finding of the study revealed that the carbon emission rate in the agriculture industry of China is very high, whereas adopting green technology is slower because of economic and policy-related factors—the carbon emission of green technological progress. In terms of spatial variations, the changes in various regions were consistent with the overall fluctuating rate compared with the state of another country, but an increasing trend has been traced within the “east-central-west” regions. The overall regional differences are gradually trending, but differences between regions mainly cause them. The increase in the structure of the agricultural agriculture industry, the level of labor, and the increase in administrative environmental regulations will weaken the obstacles to the carbon emission reduction potential of green technological progress. The increase in urbanization, the level of the agricultural economy, and economic and environmental regulations will increase the carbon emission reduction potential of green technological progress. It is necessary to actively promote exchanges and cooperation in green agricultural technology and advanced management concepts, accelerate the optimization and upgrading of the industrial structure, and achieve the goal of peaking carbon emissions through regional coordinated development. Regionally, the overall external environment and the level of green technology progress in the western region need to be improved in all respects. The central and eastern regions need to focus on combining different policy tools to transform them from hindrance to promotion.

Published
2021
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108. Distribution and Variation of Soil Bacterial Community of Two Lead-Zinc Tailings in Qinling Mountains.

Author

He, Yueqing, Wang, Haoming, Liu, Yuan, Zuo, Mingbo, Wang, Xueying, Shen, Yuanyuan, Li, Guangwen, Hu, Youning, Zhao, Minjuan, Yang, Yinli, Zhao, Youyi, and Gao, Tianpeng

Subjects
BACTERIAL communities, PLANT-soil relationships, METAL tailings, MOUNTAIN soils, SOILS, HEAVY metals, BACTERIAL diversity, SOIL pollution
Abstract

MiSeq high-throughput sequencing methods were used to study the bacterial diversity and community structure composition of Pb-Zn tailing soils in the Qinling Mountains (in the case of Bijiashan and Yanzibian), and to analyze their correlation between soil chemical properties and heavy metal concentrations. The differences between the two mine tailings were compared to summarize and analyze the main influencing factors on the soil bacterial community structure of the tailings. The results showed that the soils of the two tailings were polluted by heavy metals to different degrees, and the polluted degree of the tailings in Bijiashan was significantly higher than that of Yanzibian. Proteobacteria, Actinobacteria, Acidobacteria, Chlorella, and Firmicutes were the main dominant phyla in tailing soils. Specifically, the relative abundance of bacterial communities of Proteobacteria and Acidobacteria in the polluted soil showed a general upward trend compared with the control. On the contrary, the relative abundances of Actinobacteriota and Chloroflexi showed a decreasing trend in the contaminated soil compared with the control. Redundancy analysis (RDA) and Variance Partitioning Analysis (VPA) showed that soil chemical properties and heavy metal concentrations affected bacterial community structure jointly. Specifically, soil organic matter (SOM), total organic carbon (TOC), total potassium (TK), total phosphorus (TP), and total nitrogen (TN) are the positive influencing factors of bacterial community structure, while heavy metals Cd, Pb, Zn, Cu is a negative factor affecting bacterial community structure. We further concluded that the main influencing factors of tailing soil bacterial community structure were pH, SOM, TN and heavy metals Cd, Zn, and Pb. In addition, the effects of heavy metal contamination did not exceed the effects of soil physicochemical properties on tailing soil bacterial community structure in these two tailings. [ABSTRACT FROM AUTHOR]

Published
2023
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120. 基于降水条件的城镇化与植被覆盖协调发展研究

Author

WEN Xiaojie, null 温小洁, null 姚顺波, null 赵敏娟, YAO Shunbo, and ZHAO Minjuan

Subjects
Ecology, Geography, Planning and Development, Earth and Planetary Sciences (miscellaneous), Nature and Landscape Conservation
Published
2018

135. Intercropping contributes to a higher technical efficiency in smallholder farming : Evidence from a case study in Gaotai County, China

Author

Hong, Yu, Heerink, Nico, Zhao, Minjuan, van der Werf, Wopke, Hong, Yu, Heerink, Nico, Zhao, Minjuan, and van der Werf, Wopke

Abstract

Intercropping entails the concurrent production of two or more crop species in the same field. This traditional farming method generally results in a highly efficient use of land, but whether it also contributes to a higher technical efficiency remains unclear. Technical efficiency refers to the efficiency with which a given set of natural resources and other inputs can be used to produce crops. In this study, we examined the contribution of maize-based relay-strip intercropping to the technical efficiency of smallholder farming in northwest China. Data on the inputs and crop production of 231 farms were collected for the 2013 agricultural season using a farm survey held in Gaotai County, Gansu Province, China. Controlling for other factors, we found that the technical efficiency scores of these farms were positively affected by the proportion of land assigned to intercropping. This finding indicates that the potential negative effects of intercropping on the use efficiency of labour and other resources are more than offset by its higher land-use efficiency when compared with monocropping.

Published
2019

136. Social and ecological benifits evaluation of water-saving irrigation technology adoption in Minqin County

Author

Yan Yan, Zhao Minjuan, Qiao Dan, Xu Tao, Lu Qian, and Yao Liuyang

Subjects
0209 industrial biotechnology, Thesaurus (information retrieval), 020901 industrial engineering & automation, business.industry, Environmental resource management, 0202 electrical engineering, electronic engineering, information engineering, 020201 artificial intelligence & image processing, 02 engineering and technology, Water saving irrigation, business
Published
2016

150. Ecosystem Service Valuation of Watershed Restoration in the Shiyang River Basin Under Heterogeneous Preferences

Author

Liu Bingyang, Zhao Minjuan, Lu Qian, Xu Tao, Shi Hengtong, and Yao Liuyang

Subjects
education.field_of_study, geography, Environmental Engineering, geography.geographical_feature_category, Ecology, business.industry, Population, Environmental resource management, Drainage basin, Structural basin, Ecosystem services, Willingness to pay, Mixed logit, Ordinary least squares, Ecosystem, education, business, Ecology, Evolution, Behavior and Systematics
Abstract

Evaluations connect ecosystem and human welfare to achieve restoration. There have been an increasing number of studies conducted on various ecosystem service assessments, but little research has focused on inland river basins playing a critical role in development in northwestern China. The distinct differences in natural endowment, socioeconomic characteristics among the upper, middle and downstream inland river basin require heterogeneity during evaluation. The objective of this study was to verify the existence of population preference heterogeneity and examine impact factors using choice experiment surveys in the Shiyang River Basin, China. A mixed logit model using data from 714 households across the entire basin estimated mean willingness to pay and the standard deviation for ecological attributes. Ordinary least squares (OLS) was employed to estimate the effects of exogenous variables on all willingness to pay estimations. The results demonstrate that ecosystem service values are heterog...

Published
2015

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