通讯机构：
[Hui Liu] S;School of Economics, Hunan Agricultural University, Changsha 410128, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
climate change;farm irrigation facilities;agriculture total factor productivity (TFP);technical advancement
摘要：
Due to the trend of global warming, individuals from all walks of life have paid close attention to how climate change affects food security. China is a sizable nation with a rich climate and a diverse range of food crops that are of interest to researchers. Additionally, there is little mention of agricultural technology and farm irrigation facilities in academic research on climate change and agricultural economic growth in China. As a result, this study uses the SBM model, panel fixed effect model, and SYS-GMM model to examine the development trend of climate change and food security based on the panel data of Chinese provinces from 2000 to 2020. The study found that China has maintained an average annual growth rate of 4.3% in agricultural total factor productivity (TFP) in recent years, despite the impact of extreme weather. The average annual precipitation has a depressing influence on the TFP in agriculture, while the average annual temperature has the opposite effect. The farm irrigation facilities and agricultural technology’s moderating impact is mostly shown in how well they attenuate the impact of climate change on the TFP in agriculture. Food crops have thereby improved their ability to survive natural risks and attain higher yields as a result of advancements in agricultural technology and increasing investment in contemporary farm irrigation facilities. The study’s conclusions are used in the article to make the suggestion that strengthening climate change adaptation is necessary to ensure food security. The strategic policy of “storing grain in technology and storing grain in the soil” and the advancement of contemporary agricultural technology must be put into reality while the management system for grain reserves is being improved.
通讯机构：
[Weikun Zhang] S;School of Social and Public Administration, Lingnan Normal University, Zhanjiang 524088, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
agricultural green production;technological progress;green total factor productivity;spillover effect;threshold effect
摘要：
This study performs the spatial Durbin model (SDM) and threshold model to analyze the efficiency of agricultural green production following technological progress from 1998 through 2019. The SDM supports a nonlinear contribution of technological progress spillover to agricultural green total factor productivity (GTFP), exacerbated by upgrading agricultural structure. Moreover, the threshold model confirms that technological progress has a single threshold effect on agricultural GTFP with the rationalization of the agrarian system as a threshold variable; meanwhile, the contribution of technological progress to agricultural GTFP is less than that of agricultural total factor productivity. Out of the expanded application of dissipative structure theory in agricultural GTFP systems innovatively, this study reveals the urgency to strengthen the innovation of independent technology, lower the threshold for introducing technology, and optimize the agrarian structure in the long-term sustainable agriculture for the economies that are undergoing a similar development stage as China.
期刊：
International Journal of Environmental Research and Public Health,2022年19(22):15070- ISSN：1661-7827
通讯作者：
Jihai Shao
作者机构：
[Shao, Jihai; Yan, Qiong] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Xiao, Peng] Wenzhou Univ, Coll Life & Environm Sci, Natl & Local Joint Engn Res Ctr Ecol Treatment Te, Wenzhou 325035, Peoples R China.;[Li, Jun] Hunan Res Inst Chem Ind, Hunan Prov Key Lab Agrochem, Natl Engn Res Ctr Agrochem, Changsha 410014, Peoples R China.;[He, Yaxian] Zhuzhou Ecol & Environm Monitoring Ctr, Zhuzhou 412000, Peoples R China.
通讯机构：
[Jihai Shao] C;College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
Long-term of excessive fertilization using nitrogen (N) chemical fertilizer caused the acidification of paddy soils. Presently, the impacts of soil acidification on physiological characteristics of diazotrophic cyanobacteria remain unknown. In order to elucidate this issue, the effects of paddy floodwater acidification on activities of respiration, photosynthetic oxygen evolution, and N-2 fixation of a paddy diazotrophic cyanobacterium Aliinostoc sp. YYLX235 were investigated in this study. In addition, the origination and quenching of intracellular reactive oxygen species (ROS) were analyzed. The acidification of paddy floodwater decreased intracellular pH and interfered in energy flux from light-harvesting chlorophyll antenna to the reaction center of photosystem II (PS II). Activities of respiration, photosynthetic oxygen evolution, and N-2 fixation were decreased by the acidification of paddy floodwater. Accompanied with an increase in ROS, the level of antioxidative system increased. Superoxide dismutase (SOD) and catalase (CAT) were the main enzymatic ROS scavengers in the cells of YYLX235; reduced glutathione (GSH) was the main non-enzymatic antioxidant. Antioxidants and oxidants in the cells of YYLX235 lost balance when the pH of paddy floodwater fell to 5.0 and 4.0, and lipid oxidative damage happened. The results presented in this study suggest that the acidification of paddy soil severely interfered in the photosynthesis of diazotrophic cyanobacteria and induced the production of ROS, which in turn resulted in oxidative damage on diazotrophic cyanobacteria and a decrease in cell vitality.
作者机构：
[Zeng, Fusheng; Liao, Wangda] Hunan Agr Univ, Sch Econ, Changsha 410128, Peoples R China.;[Chanieabate, Meseret] Hunan Univ Sci & Engn, Res Inst Rural Revitalizat, Yongzhou 425199, Peoples R China.
通讯机构：
[Meseret Chanieabate] R;Research Institute of Rural Revitalization, Hunan University of Science and Engineering, Yongzhou 425199, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
Developing countries with small-scale agriculture have yet to exploit the untapped potential of agricultural mechanization. This is because of the misconception that mechanization is often seen as unworthy in small-scale agriculture. The purpose of this paper is to examine the development of agricultural mechanization in China and to provide evidence on how smallholder farmers can access agricultural machinery. A narrative approach was employed to conduct an in-depth analysis of the policies, strategies, and trends associated with agricultural mechanization development. The findings showed that: (1) the establishment and development of mechanization for smallholder agriculture is an evolutionary process that strongly opposes leapfrogging (technocratic behavior) and making large jumps; (2) the foundation of mechanization development should rely on a self-reliance system; (3) an appropriate mechanization theory is the key to inducing the rapid growth of mechanization in small-scale agriculture; (4) the successful application of agricultural machinery requires strong, target-oriented, and pro-farmer policies with effective leadership strategies. We present the key lessons on policy and institutional aspects for countries with small-scale agriculture and who are in the initial stages of agricultural mechanization.
通讯机构：
[Lijuan Zhou] S;School of Public Management and Law, Hunan Agricultural University, Changsha 410128, China<&wdkj&>Author to whom correspondence should be addressed.
关键词：
internet use;social safety perception;China;CSS2017
摘要：
Since the advent of the Internet has changed how risk information develops and disseminates, citizens' risk perception alters correspondingly. Although extant studies have explored the impacts of Internet use on citizens, only a few have focused on citizens' perception of social safety exclusively. This study examined the effect of Internet use and Internet use frequency on citizens' perception of social safety with 2017 China Social Survey data. It found that Internet use and Internet use frequency have a significant negative impact on citizens' social safety perception. Compared to non-users, the probability of perceiving society as very safe decreases significantly by 2.3% for Internet users. Subsequently, this study avoided the endogeneity issues by employing the Bioprobit and CMP methods, and the robustness check adopted propensity score matching methods. In general, it supported results in benchmark regression. The heterogeneity analysis indicated that Internet use had a higher negative impact on citizens in the western region, rural household registration, and middle-aged groups. It suggests that the establishment of a comprehensive mechanism to regulate online information involving governments, Internet industrial organizations, and Internet users may improve governance effectiveness. In addition, education targeting Internet literacy is required to enable a more rational citizen participation on the Internet.
通讯机构：
[Hui Wang] C;College of Water Resources and Civil Engineering, Hunan Agricultural University, Changsha 410128, China<&wdkj&>Author to whom correspondence should be addressed.
摘要：
Irrigation with treated domestic wastewater (TWW) affects the physicochemical properties of soils, but little research has been conducted for different soils in subtropical regions. Consequently, in order to evaluate the effects of domestic wastewater (treated by A2/O process) irrigation on the hydraulic properties, soil salinity and sodicity of four typical subtropical agricultural soils, a soil-column experiment was conducted for one year with eight cycles of wetting and drying. A clay soil (red soil), a silty clay soil (aquic soil), a loamy clay soil (purple soil), and a silty clay loam soil (paddy soil) were subjected to three irrigation modes: (a) cyclic irrigation with TWW (W1), (b) alternating irrigations with TWW and distilled water (W2), and (c) irrigation with distilled water as a control (CK). Our results indicated that EC values increased significantly (p < 0.05) with TWW irrigation for all the soils. TWW irrigation increased the concentrations of Na+, K+, Ca2+, Mg2+, and SAR, ESP values in the red soil, for the W2 treatment especially. In contrast, it decreased Na+, K+, Ca2+, Mg2+ accumulation and ESP values in the aquic soil. Moreover, the soil physical properties exhibited correlations with soil salinity. The saturated hydraulic conductivity (Ks) of the red soil, purple soil, and paddy soil were lower under the W1 and W2 treatments than CK, but the Ks of the aquic soil for W1 were 183.7% higher than that under CK. The unsaturated hydraulic conductivity (K psi) of the purple soil and paddy soil decreased after TWW irrigation, but those of the aquic soil increased. The water-retention capacities (WRCs) of the TWW-irrigated red soil and aquic soil decreased as a consequence of a shift in the pore-size distribution toward wider pores, but the those of the purple soil and paddy soil improved, associated with narrower pores. The W2 treatment alleviated the impact of TWW on the aquic soil, purple soil, and paddy soil but negatively affected the physical properties, salinity, and sodicity of the red soil. Our results will provide useful information for managing soil and water under TWW irrigation in subtropical regions.
通讯机构：
[Chunyun Guan; Mei Guan] A;Authors to whom correspondence should be addressed.<&wdkj&>Southern Regional Collaborative Innovation Center for Grain and Oil Crops in China, Changsha 410128, China<&wdkj&>College of Agriculture, Hunan Agricultural University, Changsha 410128, China<&wdkj&>Hunan Branch of National Oilseed Crops Improvement Center, Changsha 410128, China
摘要：
The overuse of chemical fertilizers has caused various ecological problems in China, necessitating the development of organic alternative fertilizers. There are few studies on the rapidly emerging organic fertilizer rapeseed green manure, despite the importance of understanding its decomposition efficiency and impact on soil. In this study, using plant residue from 14 rapeseed cultivars, we examined the 30-day decomposition changes under conditions A and B (150 and 300 g of plant residue returned, respectively) and detected the effects of their decomposition on soil nitrogen, phosphorus, potassium, and microorganisms. Under condition B, the 30-day cumulative decomposition and nutrient release rates of rapeseed were higher than those under condition A, and the rapeseed decomposition rate exceeded 50% under both conditions, which is similar to results in legume green fertilizers. Moreover, the decomposition of rapeseed green manure significantly increased the soil nutrient content and effectively improved the soil bacterial community structure and diversity relative to the original soil, especially under condition B. Thiobacillus, Azotobacter, and Pseudomonas are bacteria that responded to plant decomposition, and the abundance of the three bacterial genera after plant decomposition was significantly correlated with the plant decomposition traits and soil nutrient content. In conclusion, rapeseed green manure has potential to offset the use of chemical fertilizers, promoting sustainable agricultural development, and this study provides a reference for such green fertilization measures.
通讯机构：
[Kuangyuan Pei] S;School of Business, Hunan Agriculture University, Changsha 410128, China<&wdkj&>Author to whom correspondence should be addressed.
期刊：
Journal of Cleaner Production,2022年335:130288 ISSN：0959-6526
通讯作者：
Wei Li<&wdkj&>Fu Jia
作者机构：
[Liu, Kanying; Lan, Yong] Hunan Agr Univ, Sch Business, Changsha 410128, Hunan, Peoples R China.;[Liu, Kanying; Li, Wei] Hunan Univ, Sch Econ & Trade, Changsha 410079, Hunan, Peoples R China.;[Li, Wei] Hunan Key Lab Logist Informat & Simulat Technol, Changsha 410079, Hunan, Peoples R China.;[Jia, Fu] Univ York, York Management Sch, York YO10 5GD, N Yorkshire, England.
通讯机构：
[Wei Li] S;[Fu Jia] Y;School of Economics and Trade, Hunan University, Changsha, Hunan, 410079, PR China<&wdkj&>Hunan Key Laboratory of Logistics Information and Simulation Technology, Changsha, Hunan, 410079, PR China<&wdkj&>York Management School, University of York, YO10 5GD, UK
摘要：
Behaviour-based pricing (BBP) fully considers the willingness to pay, behavioural characteristics and rational expectations of new and old customers and can dynamically adjust pricing strategies based on purchase histories. Therefore, compared with uniform pricing, BBP can promote the development of green products in the market. Additionally, BBP gradually influences the pricing decisions of the supply chain. Therefore, this paper explores for the first time the pricing decisions and coordination mechanisms of the green product supply chain (GPSC) under a behavioural pricing model. BBP is implemented under two scenarios, centralisation and decentralisation, and the optimal pricing and supply chain decision-making are compared. Under the centralised scenario, the profit, greenness, market share and environmental friendliness are all higher than those under the decentralised scenario, and in most cases, consumers can better afford green products. Therefore, a revenue-sharing model is designed to realise GPSC coordination under BBP. The numerical experiments show that the proportion of revenue shared by green product retailers is positively correlated with the initial market share of green products; the proposed coordination mechanism can improve the greenness and profits of enterprises in a GPSC, the consumer surplus of green products and the overall environment performance.
关键词：
Trade policy uncertainty;Precious metal markets;China-US trade Conflict;Time-varying spillovers
摘要：
Using a time-varying vector autoregressive (TVP-VAR) model combined with a spillover index, we study the dynamic spillovers between trade policy uncertainty (TPU) and precious metal markets during the Sino-US trade war. The results show obvious spillover effects between the Chinese TPU and American TPU and the precious metal markets, and the strength and direction of the spillover effects are time-varying and asymmetrical. The uncertainty of the Sino-US trade policy has a heterogeneous impact on the precious metal markets. American TPU dominates the markets, followed by Chinese TPU. In the face of trade war conflict, the spillover fluctuation of American TPU to Chinese TPU is very significant. In addition, in the face of trade policy uncertainty, gold and silver have strong self-adjustment abilities and stabilities, making them highly suitable for hedging investments. International investors and policymakers should consider the impacts of international trade policy uncertainty when conducting risk monitoring and building portfolios in precious metal markets.
作者机构：
[Wu, Liang; Peng, Yuting; Li, Zhijuan] Wuhan Univ, Dept Econ & Management, Wuhan 430072, Peoples R China.;[Zhang, Zemin; Chen, Rui] Wuhan Univ, Dong FuReng Econ & Social Dev Sch, Wuhan 430072, Peoples R China.;[Jiang, Wen; Jiang, Yinjuan] Hunan Agr Univ, Econ Coll, Changsha 410125, Peoples R China.;[Zheng, Kaixin] Wuhan Univ, Acad Dev, Wuhan 430072, Peoples R China.
关键词：
carbon emission;construction sector;green development;industrial green transformation;entropy method
摘要：
In the context of the commitment to peak carbon emissions by 2030, specific sectors in China should take responsibility to change their energy consumption patterns. In China and across the globe, the construction sector is a major source of carbon dioxide emissions, as well as an indicator of economic growth and structural transformation. In this study, we examine panel data for 30 provinces or regions from 2008 to 2019 to dissect which macro-factors contribute to growth in carbon emissions, and which will lead to carbon emission reductions. Derived by the entropy method, the Green Finance Index is a comprehensive environmental regulation index related to reduction in emissions in each province. It presents an N shape for construction emissions, and provinces are currently striving to cross the first inflection point, which will help to curb emissions. Judging from the combined effects of this and other structural factors, the Green Finance Index can promote the decarbonization of production by playing the role of guiding and screening capital allocation. Population expansion, income levels, and financial development initially stimulate demand for construction, but their effects eventually level off. This paper can serve as a reference for developing countries that are experiencing industrialization and urbanization processes and handling gas discharge pressure at the same time.
通讯机构：
[Hu Yangming] C;College of Public Administration and Law, Hunan Agricultural University, Changsha, China
关键词：
Elderly people;Physical health;Neighborhood health effects;Mechanism of function
摘要：
BACKGROUND: There are more than 26 million elderly people in China, and due to the Health China strategy proposed in 2020, "Elderly Health" has become an important topic of concern for all sectors of society. Neighborhoods provide important social relationships. However, Chinese researchers have not extensively explored the impact of these relationships on the physical health of the elderly. METHODS: Based on the data from the 2018 China Health and Retirement Longitudinal Study (CHARLS), we constructed a comprehensive research framework integrating ordinary least square (OLS) regression, heterogeneity analysis, IV-2SLS, robustness testing, and Karlson-Holm-Breen (KHB) mediating effect analysis, which can be used to thoroughly examine neighborhood health effects (NHEs) in relation to the physical health of the elderly. RESULTS: The OLS results showed that the NHEs (B=0.4689, p<0.01) had a positive influence on the physical health of the elderly, and were lower than the NHEs estimated by IV-2SLS (B=0.5018, p<0.01). The mediating effects of social networks and social relationships were analyzed using KHB, and both the total (B=0.6056, p<0.01) and indirect (B=0.0800, p<0.01) effects on neighborhood health were significant, with the total effect being 10 times larger than the direct effect and 13.24% of the total effect coming from the mediating variable. CONCLUSIONS: Firstly, the NHEs positively influence the physical health of elderly persons, but there are heterogeneous differences. Secondly, the IV-2SLS estimation results suggest that not controlling for endogeneity leads to underestimation of the role of the NHEs. Thirdly, using the county-level NHEs, self-rated health, and health changes to replace variables, and grouping by smokers (small sample) and never smoked (large sample), the influence of the NHEs on the physical health of the elderly is robust. Finally, social networks and social relationships are important transmission mechanisms of the NHEs when it comes to the physical health of the elderly.
通讯机构：
[Xin Liu; Yulin Liao] A;Authors to whom correspondence should be addressed.<&wdkj&>College of Resources and Environment, Hunan Agricultural University, Changsha 410128, China<&wdkj&>Authors to whom correspondence should be addressed.<&wdkj&>Soil and Fertilizer Institute of Hunan Province, Hunan Academy of Agricultural Sciences, Changsha 410125, China
摘要：
In this study, we conducted field experiments to assess the effects of the combined application of Chinese milk vetch (Astragalus sinicus L., CMV) and red mud (RM) to remediate the cadmium-polluted acidic paddy soil. The results showed that the combined application increased the yield component index and improved the grain yields, compared with the control, RM1, RM2, and CMV treatments. However, the increased range of soil pH values in the CMV-RM1 and CMV-RM2 treatments was smaller than that of the RM1 and RM2 treatments at the different rice growth stages. The soil organic matter (SOM) contents of the RM-only treatments did not differ throughout the whole period, but were significantly different (p < 0.05) between CMV-RM2 and the control. Compared with the control, the combined application decreased the concentration of exchangeable Cd in the early rice soil. The combined application of CMV and RM substantially decreased the rice uptake of Cd. However, we found no significant difference (p < 0.05) between the CMV-RM1 and CMV-RM2 treatments. Therefore, compared with remediation with RM or CMV alone, we recommend the combined application of CMV and RM as an economical, highly effective, and replicable amendment for remediating acidic, Cd-polluted paddy soil. Considering the restorative effect and proper use of RM, we recommend CMV-RM1 treatment.
