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  1. Article ; Online: Adjustment of Meat Consumption Structure under the Dual Goals of Food Security and Carbon Reduction in China

    Sicheng Zhao / Tingyu Li / Guogang Wang / Yongxiang Zhang

    Agriculture, Vol 13, Iss 12, p

    2023  Volume 2242

    Abstract: With the progress of economic development and increase in income, there have been significant transformations in the food consumption patterns among Chinese residents. Grain consumption has declined while the consumption of livestock products such as ... ...

    Abstract With the progress of economic development and increase in income, there have been significant transformations in the food consumption patterns among Chinese residents. Grain consumption has declined while the consumption of livestock products such as meat, poultry, eggs, and milk has gradually risen. Moreover, noteworthy adjustments have been observed in the meat consumption structure itself, with a substantial increase in poultry consumption and a significant decrease in pork consumption as representative of red meat. This study collects data mainly from the “Brick Agricultural Database” and “China National Grain & Oils Information Center”. And then, we employ the China Agricultural Industry Model (CASM) to simulate the economic and ecological consequences of augmenting poultry consumption as a substitute for red meat intake. The research findings demonstrate that ensuring an adequate intake of livestock products for residents without any decline will stimulate the doubling of China’s poultry meat demand by 2035 compared to 2020 while replacing pork. This would reduce feed grain requirements by 50 million tons and achieve carbon emission reductions amounting to 82 million tons. If we consider the consumption of poultry consumption growth in conjunction with its substitution for other red meats such as pork, beef, and mutton, this will save approximately 20 million tons of feed grains and lead to a reduction of around 103 million tons in carbon emissions. In conclusion, promoting future increases in poultry consumption as a substitute for pork and other red meat will yield extensive economic andecological benefits contributing toward international food security goals, as well as global carbon reduction targets. Additionally, advocating for increasing poultry consumption will also reduce the risk of chronic diseases and malignant tumors; this will significantly improve the national health states.
    Keywords poultry consumption ; pork consumption ; nutrient intake ; carbon emissions ; feed grain ; Agriculture (General) ; S1-972
    Subject code 950
    Language English
    Publishing date 2023-12-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Promoting grain production through high-standard farmland construction

    Shuai Hao / Guogang Wang / Yantao Yang / Sicheng Zhao / Shengnan Huang / Liping Liu / Huanhuan Zhang

    Journal of Integrative Agriculture, Vol 23, Iss 1, Pp 324-

    Evidence in China

    2024  Volume 335

    Abstract: Food security is a strategic priority for a country’s economic development. In China, high-standard farmland construction (HSFC) is an important initiative to stabilize grain production and increase grain production capacity. Based on panel data from 31 ... ...

    Abstract Food security is a strategic priority for a country’s economic development. In China, high-standard farmland construction (HSFC) is an important initiative to stabilize grain production and increase grain production capacity. Based on panel data from 31 sample provinces, autonomous regions, and municipalities in China from 2005–2017, this study explored the impact of HSFC on grain yield using the difference-in-differences (DID) method. The results showed that HSFC significantly increased total grain production, which is robust to various checks. HSFC increased grain yield through three potential mechanisms. First, it could increase the grain replanting index. Second, it could effectively reduce yield loss due to droughts and floods. Last, HSFC could strengthen the cultivated land by renovating the low- and medium-yielding fields. Heterogeneity analysis found that the HSFC farmland showed a significant increase in grain yield only in the main grain-producing areas and balanced areas. In addition, HSFC significantly increased the yields of rice, wheat, and maize while leading to a reduction in soybean yields. The findings suggest the government should continue to promote HSFC, improve construction standards, and strictly control the “non-agriculturalization” and “non-coordination” of farmland to increase grain production further. At the same time, market mechanisms should be used to incentivize soybean farming, improve returns and stabilize soybean yields.
    Keywords high-standard farmland ; farmland construction ; food security ; food production area ; difference-in-differences ; Agriculture (General) ; S1-972
    Subject code 669
    Language English
    Publishing date 2024-01-01T00:00:00Z
    Publisher Elsevier
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Green and simple production of graphite intercalation compound used sodium bicarbonate as intercalation agent

    Xin Wang / Guogang Wang / Long Zhang

    BMC Chemistry, Vol 16, Iss 1, Pp 1-

    2022  Volume 10

    Abstract: Abstract In view of the technical difficulties in the preparation of graphite intercalation compound (GIC) such as complex processes, the need to use strong acid reagents, and the product containing corrosive elements. A novel, efficient and simple ... ...

    Abstract Abstract In view of the technical difficulties in the preparation of graphite intercalation compound (GIC) such as complex processes, the need to use strong acid reagents, and the product containing corrosive elements. A novel, efficient and simple method used sodium bicarbonate as intercalation agent was developed, which combined with mechanical force and chemical method for the green production of GIC. The production parameters were optimized by the single factor experiments, the optimal conditions were the ball mill speed 500 r/min for 4 h (6 mm diameter of the stainless-steel beads as ball milling media), the decomposition temperature 200 ℃ for 4 h, and 1:1 mass ratio of flake graphite to sodium bicarbonate. SEM results revealed that the prepared product appears the lamellar separation, pores, and semi-open morphology characteristic of GIC. FT-IR results indicated that the preparation method does not change the carbon-based structure, and the sodium bicarbonate intercalant has entered the interlayer of graphite flakes to form GIC. XRD results further showed that the GIC products still maintained the structure of carbon atoms or molecules, and the sodium bicarbonate intercalation agent has entered the interlayer of the graphite, and increased the interlayer distance of the layered graphite. The expandability of GIC products was studied, and the results show that it was expandable, and the expandable volume of GIC products prepared under optimal conditions has reached 142 mL/g. The theoretical basis for large-scale production was provided by studied the mechanism of the preparation method and designed the flow chart. The method has the advantages of simple process, products free of impurities, no use of aggressive reagents, process stable, and does not pollute the environment, being favorable to mass production, and provided new preparation method and idea for two-dimensional nanomaterials with preparation technical difficulties.
    Keywords Graphite intercalation compound ; Green production ; Mechanical force and chemical method ; Chemistry ; QD1-999
    Language English
    Publishing date 2022-03-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Full-state time-varying asymmetric constraint control for non-strict feedback nonlinear systems based on dynamic surface method

    Zhongjun Yang / Chuyan Dong / Xinyu Zhang / Guogang Wang

    Scientific Reports, Vol 12, Iss 1, Pp 1-

    2022  Volume 19

    Abstract: Abstract We investigate the tracking control problem for a non-strict feedback nonlinear system with external disturbance and time-varying asymmetric full state constraints. Firstly, the unknown nonlinear term with external disturbance in the system are ... ...

    Abstract Abstract We investigate the tracking control problem for a non-strict feedback nonlinear system with external disturbance and time-varying asymmetric full state constraints. Firstly, the unknown nonlinear term with external disturbance in the system are estimated by fuzzy logic system. The backstepping method is applied to the design of adaptive fuzzy controller. However, to prevent that the constraints are overstepped by introducing an improved log-type time-varying asymmetric barrier Lyapunov function (TABLF) in each step of backstepping design. Secondly, the dynamic surface control (DSC) is introduced in the designed algorithm to solve the computational explosion problem of controller caused by the derivative of control law. The proposed control scheme can speed up the tracking speed of the system. Compared with the previous work, it is verified that the combination of DSC and TABLF can obtain good performance within the constraint range, and can ensure fast and stable tracking convergence under external disturbance. Finally, two simulation examples verify the performance of the adaptive controller.
    Keywords Medicine ; R ; Science ; Q
    Subject code 629
    Language English
    Publishing date 2022-06-01T00:00:00Z
    Publisher Nature Portfolio
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Study on the Coupling System of Grain-Grass-Livestock of Herbivorous Animal Husbandry in Agricultural Areas

    Chengji Han / Guogang Wang / Hongbo Yang

    Land, Vol 11, Iss 691, p

    A Case Study of Najitun Farm of Hulunbuir Agricultural Reclamation in China

    2022  Volume 691

    Abstract: With the population growth and the upgrading of residents’ food consumption structures, the consumption demand for herbivorous animal products will maintain relatively rapid growth. However, restrictive factors for the development of herbivorous animal ... ...

    Abstract With the population growth and the upgrading of residents’ food consumption structures, the consumption demand for herbivorous animal products will maintain relatively rapid growth. However, restrictive factors for the development of herbivorous animal husbandry in pastoral areas have increased, and how to undertake herbivorous animal husbandry in agricultural areas has become the focus of widespread social concern. This study is based on survey data of Najitun Farm of Hulunbuir Agricultural Reclamation in China. Through field investigation and computer simulation technology of system dynamics, a development system of herbivorous animal husbandry in agricultural areas was established with the development of herbivorous animal husbandry at the core, and the balance of grassland-livestock and the combination of planting-breeding as the constraint. Moreover, the system designs the development strategy compared with the development of system inertia—strengthening and optimizing herbivorous animal husbandry and optimizing the structure of grain, economy, and the feed planting industry, and simulates the above three scenarios, respectively. The study found that without any development strategy, the inertia trend is subject to the influence of factors such as the scale of female livestock, epidemic diseases, and breeding level, so it is difficult to realize the sustainable development of the industry in the next five years. However, expanding the scale of breeding alone will occupy too much environmental capacity, and there will be a shortage in the supply of grass for a long time. According to the scheme of optimizing the structure of the grain, economy, and feed planting industry, it will not only provide feed sources for grass-feeding livestock of about 58,200 sheep units, but also realize the total agricultural output value of USD 7.02 million by the end of the 14th Five-Year Plan, which is 1.89 times of the inertia trend. At the same time, the nutrient demand of grass crops has alleviated 20.42% of the ...
    Keywords agricultural area ; herbivorous animal husbandry ; system dynamics ; system simulation ; Hulunbuir Agricultural Reclamation ; Agriculture ; S
    Subject code 630
    Language English
    Publishing date 2022-05-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: How Has Climate Change Driven the Evolution of Rice Distribution in China?

    Guogang Wang / Shengnan Huang / Yongxiang Zhang / Sicheng Zhao / Chengji Han

    International Journal of Environmental Research and Public Health, Vol 19, Iss 16297, p

    2022  Volume 16297

    Abstract: Estimating the impact of climate change risks on rice distribution is one of the most important elements of climate risk management. This paper is based on the GEE (Google Earth Engine) platform and multi-source remote sensing data; the authors ... ...

    Abstract Estimating the impact of climate change risks on rice distribution is one of the most important elements of climate risk management. This paper is based on the GEE (Google Earth Engine) platform and multi-source remote sensing data; the authors quantitatively extracted rice production distribution data in China from 1990 to 2019, analysed the evolution pattern of rice distribution and clusters and explored the driving effects between climatic and environmental conditions on the evolution of rice production distribution using the non-parametric quantile regression model. The results show that: The spatial variation of rice distribution is significant, mainly concentrated in the northeast, south and southwest regions of China; the distribution of rice in the northeast is expanding, while the distribution of rice in the south is extending northward, showing a spatial evolution trend of “north rising and south retreating”. The positive effect of precipitation on the spatial distribution of rice has a significant threshold. This shows that when precipitation is greater than 800 mm, there is a significant positive effect on the spatial distribution of rice production, and this effect will increase with precipitation increases. Climate change may lead to a continuous northward shift in the extent of rice production, especially extending to the northwest of China. This paper’s results will help implement more spatially targeted climate change adaptation measures for rice to cope with the changes in food production distribution caused by climate change.
    Keywords rice ; GEE ; crop distribution ; semi-parametric quantile regression ; Medicine ; R
    Subject code 910
    Language English
    Publishing date 2022-12-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article ; Online: The Influence of Converting Food Crops to Forage Crops Policy Implementation on Herbivorous Livestock Husbandry Development—Based on Policy Pilot Counties in Hebei, China

    Huanhuan Zhang / Guogang Wang / Jinge Liu / Shuai Hao / Shengnan Huang

    Agriculture, Vol 12, Iss 1872, p

    2022  Volume 1872

    Abstract: In the context of increasing consumption of herbivorous livestock products, competition between humans and animals for food, and increasing environmental constraints, it is necessary to solve the problem of sustainable development of China’s livestock ... ...

    Abstract In the context of increasing consumption of herbivorous livestock products, competition between humans and animals for food, and increasing environmental constraints, it is necessary to solve the problem of sustainable development of China’s livestock industry and increase the protection and development of the grassland livestock industry while making good use of production resources in agricultural areas in order to explore the development potential of the herbivorous livestock industry in agricultural areas. The Converting Food Crops to Forage Crops Policy (CFFP), as an important measure of agricultural supply-side structural reform, aims to develop a high-quality forage industry and a high-quality herbivorous livestock industry. However, over the years of policy implementation, few studies have examined the impact effects of the policy on the development of the regional herbivorous livestock industry. To fill this research gap and provide theoretical support for subsequent policy implementation, the study used the synthetic control method to examine the impact of policy implementation on the development of herbivorous livestock production in the pilot counties in Hebei Province from 2010 to 2020. The study discovered that the policy’s implementation encouraged the expansion of herbivorous livestock production in the pilot counties, but the policy’s effects on various regions and livestock species varied due to the influence of local production bases and resource endowments.
    Keywords Converting Food Crops to Forage Crops Policy (CFFP) ; policy effect ; herbivorous livestock husbandry ; Agriculture (General) ; S1-972
    Subject code 320
    Language English
    Publishing date 2022-11-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Study on Cavitation of Port Plate of Seawater Desalination Pump with Energy Recovery Function

    Wenlei Li / Rui Guo / Guogang Wang / Jingyi Zhao / Qian Zhang / Lin Yu / Qisheng Zhang

    Processes, Vol 11, Iss 743, p

    2023  Volume 743

    Abstract: To address the problem of low integration and efficiency of reverse osmosis desalination system, an energy-recovery type incurve multiple acting pump is developed with integrated functions of a high-pressure pump, energy recovery device and booster pump. ...

    Abstract To address the problem of low integration and efficiency of reverse osmosis desalination system, an energy-recovery type incurve multiple acting pump is developed with integrated functions of a high-pressure pump, energy recovery device and booster pump. In order to determine its flow range and suppress cavitation generation, a mathematical model of the port plate is established, combining the realizable k-ɛ turbulence model and the Schnerr-Sauer cavitation model to obtain the internal flow field characteristics of the port plate. The effects of different rotational speeds and inlet pressures on cavitation were analyzed to obtain the gas volume fraction distribution rules. The design is based on the pressure and mass flow monitoring test device to verify the numerical calculation results. The results show that the experimental and simulation data match accurately, and with the increase in speed and the decrease in inlet pressure, the cavitation phenomenon becomes serious and the flow coefficient is reduced. The optimal working speed of the pump in this paper is 520 r/min and the output flow is 200 L/min. Compared with conventional products, the volume is reduced by more than 40%.
    Keywords seawater desalination ; energy recovery ; cavitation ; CFD ; Chemical technology ; TP1-1185 ; Chemistry ; QD1-999
    Subject code 621
    Language English
    Publishing date 2023-03-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  9. Article ; Online: Climate Change is Likely to Alter Sheep and Goat Distributions in Mainland China

    Yongxiang Zhang / Guogang Wang / Yu Zhang / Sicheng Zhao / Chengji Han

    Frontiers in Environmental Science, Vol

    2021  Volume 9

    Abstract: Climate change endangers food security worldwide, especially in developing countries. Livestock husbandry is one of the essential livelihoods for farmers and herders in remote arid and semiarid regions. However, it remains unclear how climate change will ...

    Abstract Climate change endangers food security worldwide, especially in developing countries. Livestock husbandry is one of the essential livelihoods for farmers and herders in remote arid and semiarid regions. However, it remains unclear how climate change will impact livestock husbandry in the future. This study collected sheep and goat distributions from the “gridded livestock of the world” (GLW) dataset for 1943 counties in Mainland China. Current climate data include precipitation and temperature from the National Meteorological Information Center (NMIC). We disentangled the effects of precipitation and temperature on current distributions of sheep and goats with the Bayesian Hierarchical Model by Integrated Nest Laplace Approximation (INLA). Further, we forecasted the potential sheep and goat distributions in 2030 and 2050 under Coupled Model Intercomparison Project (CMIP) scenarios. Our result showed that sheep distribution is significantly correlated with elevation, slope, market density, and highway distance, with absolute correlation coefficients ranging from 0.019 to 0.411. In addition to elevation, slope, and market density, goat distribution is also affected by gain production, with a correlation coefficient of 0.055. There is a dynamic correlation of temperature and precipitation with sheep and goat density. The sheep density distribution is predicted to increase in Northwest China, while the goat density distribution might increase in farming areas under climate change. Finally, this study suggests for the sheep and goat breeding industry to respond to climate change.
    Keywords integrated nest laplace approximation (INLA) ; bayesian hierarchical model ; rainfall ; CMIP 6 ; market factors ; Environmental sciences ; GE1-350
    Subject code 910
    Language English
    Publishing date 2021-12-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Coastline Management

    Suxia HUO / Guogang WANG / Chun XIU / Tianyu ZHANG / Keke CHEN

    E3S Web of Conferences, Vol 206, p

    Review and Countermeasure Proposal

    2020  Volume 03029

    Abstract: The scientific coastline management is of great significance to the development of marine economy, coordinated development of land and marine and construction of ecological civilization. The coastline management in China has experienced two main stages: ( ...

    Abstract The scientific coastline management is of great significance to the development of marine economy, coordinated development of land and marine and construction of ecological civilization. The coastline management in China has experienced two main stages: (i) the stage of basic survey and jurisprudential establishment, and (ii) the stage of perfection under new situation. There are challenges in promoting modern marine governance and marine power, which are characterized by the lack of high-quality management involvement throughout the coastline management process. Accordingly, coastline supervision is not comprehensive, the standardized system still needs to be improved, and the research on the main function of coastline has not been conducted yet. On this basis, the corresponding strategies were put forward from the perspectives of top-level design, main function, the “double-index” assessment system, requisition-compensation balance of natural coastline, with a view to provide strategic support for coastline management in China.
    Keywords Environmental sciences ; GE1-350
    Subject code 333
    Language English
    Publishing date 2020-01-01T00:00:00Z
    Publisher EDP Sciences
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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