bluuebunny/crossref_metadata_2025_split huggingface dataset:
Horizontal Distribution Trend of Cadmium Content in Surface and Bottom Waters
Authors: Yang Dongfang , Li Haixia , Li Ye , Ren Haoyuan , Wang Qi 
Published: September 2019

Abstract
According to investigation data of Jiaozhou Bay in 1991, this paper studied the vertical distribution and seasonal variation of Cd in surface and bottom waters from bay center to northern bay mouth, and determined its seasonal distribution, variation range and horizontal distribution trend. The results showed that in May and August, in the entire waters from bay center to northern bay mouth, from surface to bottom, the Cd content range was 0.06-0.58μg/L, which shows that the water was not polluted by Cd. From May to August, in bay center, the seasonal variation of Cd content at surface and bottom was an order of summer > spring. In May and August, in northern bay mouth, the seasonal variation of Cd content at surface was an order of spring > summer, and summer > spring at bottom. The seasonal variation of Cd content shows that the Cd content at surface was not controlled by season, but source transport. Besides, Cd content at bottom was not controlled by season, but cumulative effect and dilutive effect when Cd content at surface reached seafloor. In Jiaozhou Bay, in surface and bottom waters from bay center to northern bay mouth, the horizontal distribution trend of Cd contents at surface and bottom was presented. The horizontal distribution trend of Cd content at surface and bottom was opposite in May and consistent in August. The results disclosed the principle of horizontal distribution trend at surface and bottom. Cd content was transported from sources reached surface, then rapidly and constantly sedimentated to seafloor. When Cd content reached high before being cumulated in seafloor, the horizontal distribution trend of Cd content at surface and bottom was consistent. On the contrary, it was opposite. In bottom waters, the accumulation of Cd content and its gravity features determined the consistent horizontal distribution trend of matter content at surface and bottom.
Effects of nitrogen fertilizer on soil chemical property in citrus orchard
Authors: Zhang Jiawen , Huang Jinqiu , Wang Zhihui , Wang Xun 
Published: September 2019

Abstract
The present research investigated the soil chemical properties applied nitrogen different amounts in Citrus orchard. The available nitrogen, available potassium and available phosphorus, as well as soil pH value and organic matter contents were determined. The results showed that the available nitrogen, available potassium, available phosphorus and organic matter in the soil were higher than the control.
Guilin Sustainable Development City Construction Countermeasure and Idea Design for SDGs in 2030
Authors: Zhang Yanjiao , Shao Chaofeng , Shi Yanmin 
Published: September 2019

Abstract
The GDP-driven urban development has created serious resource and environmental issues, and how to achieve sustainable urban development has become the focus of the world. Based on the 17 SDGs identified in the“2030 Agenda for Sustainable Development”, the connotation and index system of sustainable cities are analyzed. Then, focusing on the new situation for constructing the National Sustainable Development Agenda Innovation Demonstration Zone in Guilin City, it identifies the key index of sustainable city in Guilin from three aspects, which are economy, society, and environment. And considering the scale of tourism and its support for the local economy, some popular tourist cities, like Tianjin, Guangzhou, Shanghai, and Hangzhou, are selected for comparative analysis to diagnose the bottleneck of sustainable city construction in Guilin. Finally, this paper proposes the Countermeasures and ideas for building sustainable city in Guilin with the theme of sustainable utilization of landscape for SDGs.
Long and short duration heavy rainfall spatio-temporal patterns change and its contribution to total heavy rainfall in China
Authors: Kong Feng 
Published: September 2019

Abstract
Recent studies have noted a worldwide increase in the occurrence of extreme-precipitation events. Here we use daily rainfall data from 1951 to 2010 of 659 meteorological stations in China and on the basis of duration days defined long duration heavy rainfall. Results indicate that: on the spatial distribution, short duration heavy rainfall shows gradually decreasing phenomenon from the southeast coastal to northwest inland in China from 1951 to 2010. And long duration heavy rainfall is concentrated in the southeast coastal areas, such as Guangdong, Guangxi and Hainan. On the temporal change, the interannual and interdecadal short and long duration heavy rainfall both show increasing trend. In precipitation contribution ratio, the proportion of total heavy rainfall amounts to total rainfall amounts and total heavy rainfall days to total rainfall days are 6.1%∼27.7% and 0.6%∼27.7% respectively from 1951 to 2010 in China. Short duration storm to occupy the dominant position that the proportion of short duration heavy rainfall amounts to total heavy rainfall amounts and short duration heavy rainfall days to total heavy rainfall days are 75.9%∼89.4% and 75.6%∼89.4% respectively in the same period. Long duration heavy rainfall occupy a secondary position that the proportion of long duration heavy rainfall amounts to total heavy rainfall amounts and short duration heavy rainfall days to total heavy rainfall days are only 10.6%∼24.1% and 10.8%∼24.4% respectively. On the trend of precipitation contribution, China’s the contribution rate of total heavy rainfall to the total rainfall show increasing trend with contribution of rainfall amounts and rainfall days trend are 2.1%/10a and 0.2%/10a respectively. The contribution rate of short duration heavy rainfall to the total heavy rainfall show increasing trend with contribution of rainfall amounts and rainfall days trend are 0.5%/10a and 0.4%/10a respectively. On the contrary, the contribution rate of long duration heavy rainfall to the total heavy rainfall show decreasing trend with contribution of rainfall amounts and rainfall days trend are -0.5%/10a and -0.4%/10a respectively. The results suggest that the precipitation in China are changing to extremely accompanied by short duration storm increased significantly.
Spatial-temporal Dynamic Analysis of Landscape Ecological Security of Chishui River Basin in Guizhou Province, China
Authors: Feng Tu , Li Wangjun , Liang Qin , Xiao Qunying , Ren Jintong 
Published: September 2019

Abstract
Using the technologies of GIS and RS for the perspective of landscape ecology, the characteristics of landscape ecological security changes of Chishui River Basin in Guizhou Province from 1995 to 2015 were analyzed. The results showed that: (1) In the past 20 years, the utilized land types in the study area were changed greatly. The disturbance of human factors on utilized land change was serious. The area of construction land was increased rapidly, the area of forest land was decreased, while the cultivated land increased first and then decreased. (2) In the past 20 years, the landscape fragmentation index and landscape separation index of other utilized land types were increased except the construction land. The fractal dimension indices of other landscape types were increased, but the change was not obvious. With the continuous development of economy and society, the disturbance of human activities to various landscape types was increased. (3) From the point of view of temporal and spatial changes of landscape ecological security, the overall situation of landscape ecological security in the study area was better, and the area with high ecological security was increased in the past 20 years. Less than 10% of the area was in low ecological security, but the overall trend was increasing, and the problem of ecological security was serious. (4) In the past 20 years, the spatial aggregation of towns with similar landscape ecological security in the study area decreased first and then increased, and the spatial aggregation types were low to low and high to high .
Comparative Study on the Physicochemical Characteristics and Fatty Acid Composition of Cashew Nuts and Other Three Tropical Fruits
Authors: Liu Yijun , Li Xiaofei , Liang Yuen , Liang Jiemin , Deng Dongyan , Li Jihua 
Published: September 2019

Abstract
In order to investigate the differences of three kinds of special fruits between cashew nut oil and macadamia nut oil in the aspects of physicochemical properties and fatty acid composition, the acid value, iodine value, peroxide value, saponification value, non-saponification value, moisture and The volatile matter, pH, colour and fatty acid composition were compared. The results showed that the three oils had significant differences, and the macadamia had the highest oil content. The macadamia nut and cashew nut oil had a significant difference in oil yield. The price, iodine value, moisture and volatile matter content and colour difference were significant. The macadamia nut oil had the lowest acid value. The cashew nut oil had the highest iodine value and the lowest moisture and volatile matter content. The difference of the fatty acid composition of the three oils was that camellia seed oil contains a-linolenic acid, the cashew nut oil contains linoleic acid, and the macadamia nut oil contains lauric acid and myristic acid. This study identified the significant differences in oil content, extraction rate, physicochemical properties, fatty acid composition and relative content between the three oils, which provided basic data support for the development of functional products in the later period.
Study on Intrinsic Factors Affecting Production Technology of Low Carbon Agriculture and Forestry Plants
Authors: Luo Le , Zhou Ying , Li Qi , Mao An 
Published: September 2019

Abstract
The management of low-carbon agriculture and forestry plant farms is an important path to promote the development of agricultural industry. This study used binary logistic regression method to construct a logistic regression model of low-carbon agriculture and forestry plant production status. The various conditions of low-carbon agroforestry production were analysed. The various internal factors affecting the evaluation of the production status of low-carbon agroforestry plants and the farm production as well as production status were discussed and comprehensively evaluated. Six main influencing factors were summarized and analysed, which were seedling quality, seed market supervision, fruit and vegetable standardization, fruit and vegetable market supervision, fruit and vegetable market infrastructure, post-harvest treatment of fruits and vegetables, and the promotion of low carbon farmland and plant production.
Residual and migration characteristics of norfloxacin in two mangrove ecosystems
Authors: Li Ling , Liu Yu , Sun Qinyu , Yu Fei , He Shuwen 
Published: September 2019

Abstract
Direct discharge of aquaculture wastewater in coastal areas could increase concentrations of antibiotics in coastal mangrove forests. This study focused on the Gaoqiao Mangrove Nature Reserve in Zhanjiang City, Guangdong Province. Norfloxacin (NOR) residues in rhizosphere sediments, plant roots, branches, and leaves of two dominant mangrove communities, Rhizophora stylosa and Avicennia marina, the correlation between physical properties of rhizosphere deposition and residual NOR in sediments, and NOR accumulation in the root system were analyzed. Significant differences were noted in NOR residues in rhizosphere sediments of R. stylosa and A. marina, with higher NOR concentrations than those in other wetland sediments locally and abroad. NOR accumulation in R. stylosa was higher in the branches than in the roots and was also significantly higher than that in A. marina. Thus, both species could accumulate NOR from the environment with R. stylosa showing a stronger potential to purify the environment. Cation exchange capacity and total organic carbon could affect NOR distribution in the rhizosphere sediment, and total organic carbon content could reduce NOR uptake by mangrove roots. This study contributes to research on the migration and adsorption characteristics of antibiotics in mangrove wetlands.
Discussion on Defense Safety Design for Rural-Urban Fringe Zones in Changchun in the View of Criminal Pattern Theory — A Case Study of A Typical Zone Dominated by Industrial Lands in Changchun
Authors: Wang Keqi , Sun Zhaorui , Liang Baixue 
Published: September 2019

Abstract
The rural-urban fringe zones are the by-products of rapid urbanization in China. They are specific regions where the urban and the countryside permeate mutually. On account of their ambiguous, dynamic, complex and farraginous characteristics, there are many personal defense safety hidden danger, and there are many vulnerable spaces and hot spots for crime as well. The author summarizes four kinds of hot spots in view of defense safety, namely, spatial nodes, linear paths, transition edges and spatial areas. Using the crime pattern theory and the crime template proposed in paper, the author analyzes the defense safety problem on four kinds hot spots in a typical rural-urban fringe zone dominated by industrial lands in Changchun and finally puts forward feasible strategies that reverse the crime template.
Effects of Temperature on Growth and Quality of Dormancy-released Sedum aizoon L.
Authors: Chen Yan , Yang Luxi , He Zhongqun 
Published: September 2019

Abstract
The effects of recovery growth were compared by measuring the biomass and quality indices when dormancy-released Sedum aizoon L. were treated at 25°C, 20°C and 15°C respectively. The results showed that with the increasing temperature, the plant height and aboveground fresh weight all showed an upward first and then downward trend. The contents of chlorophyll, carotenoids, calcium and zinc all showed an upward trend, while magnesium and iron all showed a downward first and then upward trend in fresh food part. The contents of soluble protein, vitamin C, free amino acid and flavonoid all showed a downward trend, while total soluble sugar, caffeine and oleanolic acid all showed an upward first and then downward trend. The plant height, aboveground fresh weight, the total chlorophyll to carotenoid ratio, the contents of total soluble sugar, caffeine and oleanolic acid were all the highest under 20°. In conclusion, the best recovery growth temperature was 20° for dormancy-released Sedum aizoon L.
Physiological and ecological responses and changes of Phaeodactylum tricornutum under long-term stress of naphthalene
Authors: Cong Sha , Yuelu Jiang 
Published: September 2019

Abstract
Naphthalene, as a common polycyclic aromatic hydrocarbon (PAHs), attracts broad attention due to its toxicity to human and marine organisms. This study investigate the effects of naphthalene on growth, maximum photochemical efficiency (F
v
/F
m), total esterase activity and reactive oxygen species production of Phaeodactylum tricornutum. The study explored how algal physiological characteristics change under naphthalene’s long-term exposure and analyzed the correlation between photosynthetic efficiency with growth, total esterase activity and reactive oxygen species production, respectively. The study shows that low-concentration naphthalene promotes slightly or doesn’t affect algal growth, total esterase activity and reactive oxygen species while it promotes F
v
/F
m significantly. On the other hand, high-concentration naphthalene inhibits algal growth, total esterase activity and F
v
/F
m significantly, while it stimulates reactive oxygen species production and the stimulation increases with time. The study also shows that growth and Fv/Fm of P. tricornutum are correlative and the correlation is related with naphthalene concentration. F
v
/F
m of P. tricornutum is significantly positively-related with total esterase activity, while is significantly negatively-related with reactive oxygen species.
Isolation and Identification of Two Antagonistic Actinomycetes against pomegranate wilt pathogen
Authors: Yinli Zhou , Wei Yang , jianbo Bai , qiong Kong , Xianqi Hu 
Published: September 2019

Abstract
Pomegranate wilt is a soil-borne disease relatively difficult to prevent. In this study, actinomycetes with strong antagonistic activity against pomegranate wilt pathogen were separated and screened from the soil samples collected from Yunnan Mengzi Wanmu Pomegranate Garden and Jianshui Pomegranate Garden. The indoor bacteriostatic radius of strain MZ12 against pomegranate wilt pathogen was 11 mm while the indoor bacteriostatic radius of strain MZ1 against pomegranate wilt pathogen was 7.25 mm. Combined with the characteristics, morphological observation and 16S rDNA sequence analysis of the two strains on identification medium, MZ12 was initially identified as Streptomyces cinnamonensis, and MZ1 as Streptomyces fulvissimus.
Application Research of Benford’s Law in Testing Agrometeorological Data
Authors: Qin Lang , Han Shuqing , Xing Liwei , Zhang Jianhua , Zhang Jing , Yang Ruyi , Wu Jianzhai 
Published: September 2019

AbstractBenford’s law is an effective tool to test the quality of data sets. In order to strengthen the research on the quality evaluation of agrometeorological data, this paper empirically analyzed the precipitation data sets of China from 1951 to 2015 from the time, space and time staggered dimensions. It was found that the overall and local quality of precipitation data sets in China was high. Further improvement and expansion of Benford’s law’s application in the future can help to detect and control the quality of agricultural data efficiently and improve the utilization rate of agricultural data.
Research on the Optimization of Agricultural Industrial Structure in Hainan Province Based on Shift-Share Method
Authors: Li Yao , Fang Heyuan 
Published: September 2019

Abstract
This paper conducts an empirical analysis of the agricultural industrial structure in various regions of Hainan Province in China from 2009 to 2017 on the basis of the shift-share method. The results show that the agricultural industries in all areas of Hainan have varying growth rates, which jointly promote the agricultural development of Hainan Province. The planting industry and fishery in coastal areas have stronger structural effects and regional advantages. Through further analysis of the changes in the internal structure of the planting industry and fishery, it is found that the optimization effect of industrial structure is significant, and that high quality and sustainable development are basically realized. Based on the conclusions of the above empirical analysis, the countermeasures and suggestions for the optimization of agricultural industrial structure in Hainan Province are proposed.
Effects of Abscisic Acid on Soluble Sugar Accumulation of Cyphomandra betacea Seedlings under Cadmium Stress
Authors: Li Zhiyu , Li Jiayu , Liu Yujia , Lu Yuyang , Huang Kewen , Lin Lijin 
Published: September 2019

Abstract
In this study, the effects of different concentrations (0, 1, 5, 10, and 20 μmol/L) of abscisic acid (ABA) on soluble sugar accumulation in Cyphomandra betacea seedlings under cadmium stress were studied. The results showed that spraying 10 and 20 μmol/L ABA could effectively increase the content of soluble sugar in roots, stems, leaves and aerial parts of C. betacea seedlings. Spraying 1 and 5 μmol/L ABA reduced the soluble sugar content in roots, stems, leaves and aerial parts of C. betacea seedlings. Therefore, the use of 20 μmol/L ABA can increase the accumulation of soluble sugar in C. betacea seedlings.
Coordinated Development of Energy, Environment and Economic Systems (3E) - Based On a Comparison of Regional Differences
Authors: Xiao-wei Zhu 
Published: September 2019

Abstract
By constructing the 3E symbiosis system model and the 3E system coordination degree evaluation model, this paper measures the coordination degree of 3E system in the three regions of Beijing-Tianjin-Hebei Urban Agglomerations(BTH), Yangtze River Delta Urban Agglomerations(YRD) and Pearl River Delta(PRD). The study found that the 3E system coordination degree in the three regions is in an intermediate coordination state, and the energy system and the environmental system are lagging behind. This paper provides assistance for understanding the coordinated development of China’s 3E system, and provides empirical support for China’s promotion of ecological civilization.
RETRACTED: Research on the Construction of Early Warning Index System of Network Public Opinion Emergency Based on Computer Simulation
Authors: Hongbing Ge 
Published: September 2019

Abstract
Under the current social background of our country, the dissemination environment, dissemination background, audience characteristics, media environment and event types of network public opinion are constantly developing and changing, and the influencing factors will also have new changes. The early warning index system of network public opinion emergencies is an important part of the crisis management of network public opinion. The analysis of network public opinion is based on the complete and accurate grasp of network public opinion. The early warning of network public opinion emergencies is based on the full exploitation and utilization of network public opinion data. Through the analysis and judgment of public opinion, the early warning mechanism of network public opinion emergencies can be improved. Computer simulation is a fast and economical important research tool, and the effectiveness and accuracy of computer simulation depends on the performance of computer simulation software tools. Using computer simulation and simulation of the process of user concept in event propagation, dynamic evolution simulation of events is analyzed according to the results of user concept, and hot events are identified.
The Climatic Characteristics of surface salinity distribution in the East China Sea from 1981 to 2010
Authors: Fen Xu , Kang Jiancheng , Chen Zhang 
Published: September 2019

Abstract
Choosing the surface salinity from SODA database during 1981 to 2010, the climatic distribution characteristics of surface salinity at the continental shelf of the East China Sea for the new 30-year climate reference period (1981-2010) were analyzed, to lay the foundation for further study of climate change. The results showed that: (1) The average salinity of the surface layer in the study area increased gradually from the Yangtze River estuary to the southeast. The isoline has a circular distribution near the Yangtze River estuary, and it is generally northeast-southwest in other sea areas of the study area; (2) In the inter-monthly change, the highest salinity in March is 27.38psu; the 5-8 month is the low salinity season, and the lowest salinity in August is 22.30psu; September-December is the season of salinity rise; (3)The annual amplitude of salinity has two regional changes: the largest positive center is located in the northeast of the Yangtze River estuary, the largest negative center is located in the waters near Hangzhou Bay south of the Yangtze River estuary.