Food Production In China Research Articles

Can technology in terms of finance, environment, and communication boost food production while facilitating a low-carbon transition? Evidence from a high-tech and low-tech state

The need to revamp the food system to combat climate change is growing. This initiative faces a major challenge: redesigning the agricultural system to increase food production (FOP) and attain sustainable development objectives simultaneously. Information and communication technologies (ICT), financial innovations, and environmental technology define a global community of shared futures, making it essential to consider whether these technologies can equally “enhance food production and reduce greenhouse gas (GHG) emissions” in agriculture in high-tech and low-tech states. The study examined the direct and indirect effects of these technologies on food production in China and Nigeria using the ARDL model. We controlled for climate factors such as precipitation, agricultural emissions, and temperature, plus agricultural factors like fertilizer consumption and land use. The findings indicate the following: 1) Financial innovation has a dual effect of increasing food production and decreasing agricultural emissions in both states. 2) Environmental technology lessens agricultural emissions in China but confirmed a dual role in Nigeria. 3) ICT directly increases (decreases) food production in China (Nigeria) as well as harms environmental quality in both states. The study found positive impact of land use, fertilizer consumption, and temperature on food production. Moreover, causality outcomes confirm the agricultural sector's environmental impact. To promote sustainable agriculture, the research suggested government and financial institutions lease agriculture machinery and offer internet based interest-free financing.

Effects of agricultural carbon footprints and malnutrition on life expectancy in China.

This study explored the impact of carbon footprints and malnutrition on life expectancy in China over the periods of 2000 and 2021. Data from the World Bank Indicators database was utilized, and Dynamic Ordinary Least Squares (DOLS) was employed to analyse the extracted data. The results show that over the periods of 2000 and 2021, agricultural carbon footprints in China experienced a first sharp decline in 2015. In contrast, per capita food production in China rose from 88.29% in 2011 to over 108% in 2021. Within a space of a decade, the undernourished population in China was reduced by 78.8%. Moreover, per capita food production had a positive impact on life expectancy in China. Conversely, malnutrition exerted a negative and significant influence on life expectancy. Agricultural carbon footprints contributed a positive but insignificant impact on life expectancy, and GDP per capita growth increased life expectancy significantly in the country. We conclude that policymakers in China are should ensure that all citizens have access to food necessary to improve life span of the country`s population.

Keeping Nitrogen Use in China within the Planetary Boundary Using a Spatially Explicit Approach.

Nitrogen (N) supports food production, but its excess causes water pollution. We lack an understanding of the boundary of N for water quality while considering complex relationships between N inputs and in-stream N concentrations. Our knowledge is limited to regional reduction targets to secure food production. Here, we aim to derive a spatially explicit boundary of N inputs to rivers for surface water quality using a bottom-up approach and to explore ways to meet the derived N boundary while considering the associated impacts on both surface water quality and food production in China. We modified a multiscale nutrient modeling system simulating around 6.5 Tg of N inputs to rivers that are allowed for whole of China in 2012. Maximum allowed N inputs to rivers are higher for intensive food production regions and lower for highly urbanized regions. When fertilizer and manure use is reduced, 45-76% of the streams could meet the N water quality threshold under different scenarios. A comparison of "water quality first" and "food production first" scenarios indicates that trade-offs between water quality and food production exist in 2-8% of the streams, which may put 7-28% of crop production at stake. Our insights could support region-specific policies for improving water quality.

Is the boom in staple crop production attributed to expanded cropland or improved yield? A comparative analysis between China and India

The characteristics of cropland development and the dynamics of food production in China and India, the world's largest agricultural and most populous countries, are of great importance to global food security. However, there is a notable lack of a thorough comparison between China and India in this regard. Here, we systematically compare the differences between China and India using cropping intensity and crop production data, including cropland area, harvested area, total staple crop (i.e., cereal crops, tuber crops and pulse crops) production and yield capacity. The results are mainly as follows: (1) Both China and India experienced an increasing trend in cropland area and harvested area from 2001 to 2021, especially notable in India. In China, the cropland area and harvested area increased by 11.76 % and 14.36 %, respectively, while in India, they witnessed a more substantial increase of 31.10 % and 49.32 %, respectively. (2) The cropping intensity underwent significant transformations, primarily shifting between non-cropland, single-cropping, and double-cropping. Northwestern China exhibited a clear trend of non-cropland converting to single-cropping, whereas northeastern China showed a distinct pattern of single-cropping changing to non-cropland. The interconversion between single-cropping and double-cropping was also frequently observed in the main food-producing regions. In India, the cropland expansion and the adoption of double-cropping are highly pronounced, extending widely across most of the country. (3) From 2001 to 2021, the total staple crop production in China and India increased by 34.12 % and 55.81 %, respectively. Despite the rapid growth in India's total staple crop production, it still amounts to only about half of China's. The major crops production also showed different trends, China's cereal crops production increased significantly, while tuber and pulse crops production declined, and India's production of cereal, tuber, and pulse crops has all increased (4) China's yield capacity has increased by 17.28 %, while India's has only grown by 4.35 %. Despite the rapid increase in India's total staple crop production, the yield gap with China has widened. The boost in China's total staple crop production mainly resulted from improved yield capacity, whereas India relied more on the cropland area expansion, especially the increase in harvested area. Our comprehensive comparison of China and India in cropland development and staple crop production contributes to a deep understanding of the differences in agricultural production between the two countries, and provides lessons for global food security and sustainable agricultural development.

Green finance and food production: Evidence from cities in China

In the domain of global socio-economic dynamics, the pivotal role of food production (FP) cannot be overstated. It constitutes the bedrock of fundamental human necessities while being inexorably linked with critical aspects such as economic expansion, societal equilibrium, and geopolitical interplays. The multifaceted nature of FP appears through its direct impact on macroeconomic indicators and its latent influence on international relations and policy-making. This critical nexus underscores the imperative for a comprehensive understanding and strategic management of food production processes to sustain and enhance global socio-economic stability and growth. Investigating the nexus between green finance (GF) and FP is pivotal for ensuring national security and promoting sustainable economic development. This research thus paper examines GF's impact on FP in China as outlined in the 2017 green finance policies. It employs the difference-in-differences (DID) method and analyzes a balanced panel dataset comprising 282 cities in China from 2009 to 2020. The results show that GF has an inhibitory effect on FP, and this remains valid after a range of reliability checks, including parallel trend assessments and placebo tests. Further findings of transmission mechanism analysis indicate that non-agricultural factors and financial exclusion are critical for GF's inhibitory effect on FP. Heterogeneity analyses show that GF's inhibitory effect on FP is more pronounced in the main food-producing areas, the main food-marketing areas, and cities with better infrastructure. The empirical results of this paper comprehensively illustrate GF's impact on FP and how it contributes to the achievement of food security objectives.

Spatial and Temporal Distribution of the Ecosystem Provisioning Service and Its Correlation with Food Production in the Songhua River Basin, Northeastern China

Provisioning services are essential components of ecosystem services. Food production is usually a driver of land use change, which has the effect on altering the provisioning services of ecosystems. As one of the main areas of food production in China, the provisioning services of the Songhua River Basin (SHRB) should be taken seriously. In view of this, it is urgent to carry out a study on the assessment of provisioning services in the SHRB to provide data support and scientific reference for the optimization of the spatial pattern of land use in the basin, the sustainable development of agriculture, and the formulation of differentiated protection policies. In this study, based on the equivalent factor method for the unit area value and spatial autocorrelation with the Moran’s I, we assessed the provisioning services values (PSV) of the SHRB every ten years during the period of 2000–2020 under different land use types and analyzed the relationships between different PSV and the production of four different food types, including rice, wheat, corn, and soja. The main conclusions are as follows: (1) From 2000 to 2020, the area of paddy fields in the SHRB increased and then decreased, while the area of dry lands continued to increase. The land use transfer matrix showed a significant expansion of paddy fields (+0.55 × 104 km2), shrinkage of grassland (−0.72 × 104 km2), and loss of water body (−0.43 × 104 km2) in the SHRB from 2000 to 2020; (2) The PSV in the SHRB showed an increasing trend from 2000 to 2020, growing by 16.73 × 1010 RMB, with the growth in 2010–2020 being greater than in 2000–2010. The order of increase in each type of PSV was: water supply > food supply > raw material supply; (3) Spatially, the increase in PSV per unit and total PSV in the SHRB was lesser in the center and greater in the east and west. Meanwhile, the spatial distribution of various PSV showed that the value of unit area food supply was higher in the central and eastern plains, while the raw material supply and water supply were higher in the western and eastern hilly areas. (4) In terms of spatial correlation, the distribution of soja production with the total PSV, food supply, raw materials supply, and water supply services values were positively spatially correlated. However, the production of rice, wheat, and corn with the total PSV, food supply, and raw materials supply services values were negatively spatially correlated. Cluster analysis revealed that changing the crop cultivation structure could protect the ecosystem and increase the value of ecosystem services.

Organic food production among Chinese urban botanists

Organic food production is recognized by most countries and regions worldwide as a method of ecological and environmental protection because traditional agricultural practices significantly use pesticides and other chemicals, creating severe issues regarding the ecological, environmental, and food safety issues. Most research on organic production focuses on large-scale organic production. This study focuses on growing noncommercial, small-scale urban organic food using the value-belief-norm (VBN) model to explore the pro-environmental behavior regarding organic food production from a psychological perspective. We employed nonprobability sampling because of the absence of a sampling framework for the target population. We obtained a sample of 621 respondents from noncommercial urban botanists in China followed by quantitative methods to examine the relationships among variables using partial least squares structural equation modeling. This study focused on organic food behavior by modifying the VBN theory, which built trust in organic food production methods and developed a structural equation model to explain the underlying motivational factors that influenced the propensity to grow organic food. Finally, the path analysis results demonstrated that all hypothesized associations were statistically significant, except for the ecological worldview on personal norms and trust in organic food production, and personal norms on intention toward organic food production. Overall, the results of this study verify the validity of the VBN theory in the context of organic food consumption as a pro-environmental behavior. Therefore, relevant departments and governments should take measures to promote organic food production in China from a psychological perspective.

Land-use intensification dominates China's land provisioning services: From the perspective of land system science

A pressing challenge to global sustainability is meeting the escalating needs of a growing population while safeguarding land resources from degradation. In recent decades, China's rapid growth, expanding population, urban sprawl, and diminishing high-quality farmland have presented a compelling case suitable for exploring solutions and challenges related to this critical issue. Therefore, there is an urgent need for comprehensive and detailed information regarding land systems. Here, we developed the first fine-scale dataset of the China Land System at a spatial resolution of 1 km, covering the period from 2000 to 2015. By leveraging this comprehensive land information, we identified five primary types of land systems and their respective subsystems, thereby delineating distinct patterns of human–environmental interaction. Land system dynamics followed diverse developmental trajectories characterized by incremental shifts toward more functionally centralized systems. Land use intensification played a significant role in increasing the population capacity and food production in China, contributing nearly 93.94% and 84.99%, respectively. In contrast, land cover changes accounted for only 4.69% and 11.43%, respectively. These findings underscore the tendency of previous studies to overestimate the impact of land cover change and underestimate the influence of land use intensification in meeting the growing demands of land-based production. This study emphasizes the importance of transcending traditional land cover-based approaches and integrating land systems into land representation and global land change scenario simulations to promote sustainability.

Government and dealer regulatory decisions on producer illegal production in China’s food supply chain

Illegal food production in China has proliferated in recent years, triggering serious public concerns on food safety. In this work, we model a regulatory event in a food supply chain comprising a local government, a dealer, and a producer involved in illegal food production, and get equilibrium regulatory decisions of the government and the dealer, and equilibrium production decisions of the producer. The results show that: 1) in a situation where the producer is likely to produce illegally, the government does not regulate, and implements insufficient or sufficient regulation according to the utility-cost ratio of regulating. 2) The regulatory decisions of the dealer depend not only on the regulatory decisions of the government but also on the utility-cost ratio of regulating. 3) Only when the joint regulatory intensity of the government and the dealer is not less than a certain threshold value, the producer will not produce illegally, and the threshold value is the optimal regulatory intensity jointly implemented by the government and the dealer. Otherwise it is ineffective, inadequate, or excessive regulation. Therefore, we suggest that the government and the dealer jointly make regulatory decisions to achieve optimal regulation at the lowest regulatory cost and evade illegal food production by the producer.

Optimizing the structure of food production in China to improve the sustainability of water resources

The conflict between the growing demand for food and limited water resources is intensifying. To further elucidate the relationship between food and water, we construct a water footprint life cycle assessment framework for food products and propose a modified algorithm for measuring a food's water footprint to assess the virtual water transfer between grain crops and animal products. To address the mismatch between regional water resources and food production, we propose a novel optimization model for food production structure, with both reducing water use and maintaining food security as its objectives. Using 2020 as an example, the analysis proposes an adjusted food production structure for China at national, regional, and provincial scales. The results show that 24.9 % of water consumed by grain crops is transferred to animal products through feed grain. The total water footprint of food production in China is 820.8 billion m3, with the blue water footprint accounting for 32.9 % of that total. The blue water footprint for food production in northern China is 161.8 billion m3, which is much larger than 108.2 billion m3 in southern China. Water scarcity is also greater in northern regions, which produce the majority of grain and animal products. Our optimization shows that a reasonable food production structure can balance water resources and food security by remarkably reducing China's total blue water footprint and increasing food production in the south while reducing production in certain northern provinces to ensure sustainable regional development.

A Large-Scale Dataset of Conservation and Deep Tillage in Mollisols, Northeast Plain, China

One of the primary challenges of our time is to feed a growing and more demanding world population with degraded soil environments under more variable and extreme climate conditions. Conservation tillage (CS) and deep tillage (DT) have received strong international support to help address these challenges but are less used in major global food production in China. Hence, we conducted a large-scale literature search of English and Chinese publications to synthesize the current scientific evidence to evaluate the effects of CS and DT on soil protection and yield maintenance in the Northeast China Plain, which has the most fertile black soil (Mollisols) and is the main agricultural production area of China. As a result, we found that CS had higher soil bulk density, strong soil penetration resistance, greater water contents, and lower soil temperature, and was well-suited for dry and wind erosion-sensitive regions i.e., the southwest areas of the Northeast. Conversely, DT had better performance in the middle belt of the Northeast China Plain, which contained a lower soil temperature and humid areas. Finally, we created an original dataset from papers [dataset 1, including soil physio-chemical parameters, such as soil water, bulk density, organic carbon, sand, silt, clay, pH, total and available nitrogen (N), phosphorus (P), and potassium (K), etc., on crop biomass and yield], by collecting data directly from publications, and two predicted datasets (dataset 2 and dataset 3) of crop yield changes by developing random forest models based on our data.

New reflections on food security and land use strategies based on the evolution of Chinese dietary patterns

Food is the fundamental guarantee for the sustainable development of human society. Countries around the world put food security on their high-priority political agenda. As the largest developing country in the world, China uses only 9% of the world’s land, contributing to 25% of the world’s food and feeding one-fifth of the population. However, with the transformation and upgrading of the dietary structure, food security in China is latent with a structural crisis. This study explored the demand for cultivated land resources under the evolution of Chinese dietary patterns, examined the transition of agricultural planting structure in China, and put forward land use strategies to ensure food security. Results show that from 1987 to 2020, the Chinese gradually shifted to land-intensive food consumption. Specifically, plant-based food, such as cereals and vegetables, gradually decreased, whereas animal-based food (land-intensive), such as meat, eggs, and milk, continued to increase. The cultivated land requirements for food (LRF) progressively approached the upper limit of domestic cultivated land resources. Unfortunately, the LRF for meat consumption was equal to that for cereals consumption, and meat consumption alone contributed 70.6% to the increase in the total LRF. More importantly, the coexistence of supply shortage and excess in China’s agricultural planting structure exhibited an imbalance. Grain was trapped in a vicious cycle of more production, more import, and more inventory, but the planting area for soybean and succulence was only one-fourth of the feed grain required for animal-based food such as meat, eggs, and milk. Furthermore, this study predicted that China would be difficult to feed its population by 2050 if it relied on domestic cultivated land alone, including implementing the Chinese Food Guide Pagoda (2022). Therefore, the work suggests that it is necessary to promote the transformation of food production in China from a single supply pattern from cultivated land resources to a multi-supply pattern that relies on different types of land resources (e.g., woodlands, grasslands, and lakes). Meanwhile, it is essential to adjust the current dietary guidelines and encourages residents to adopt resource-saving diet patterns.

Analysis of potential distribution of Spodoptera frugiperda in western China

• Over 60% of the areas in western China are suitable distribution areas of Spodoptera frugiperda . • More than 20% of the areas in western China are high suitable distribution area for Spodoptera frugiperda. • Greenhouses may raise the risk of Spodoptera frugiperda infestations in western China. Spodoptera frugiperda (J. E. Smith) (Lepidoptera: Noctuidae), a newly invaded pest that breaks out fast and severely, causes a serious threat to the national security of food production in China. In this study, the MaxEnt model was used to predict the potentially suitable distribution area of S. frugiperda in western China. The potential distribution of S. frugiperda was predicted using meteorological factors from the correlation analysis. According to the result, a satisfactory AUC value in the MaxEnt model indicates that the prediction model has good accuracy, which is sufficient for predicting the suitable distribution areas of S. frugiperda in western China. The prediction results show that the potential distribution risk of S. frugiperda is high in western Gansu, eastern Qinghai, Shaanxi, most regions of Ningxia, and part regions of Tibetan, and the most suitable areas for S. frugiperda in Xinjiang are Hami, Ili, Urumqi, Hotan and Aksu, and more than 60% of western China are suitable distribution areas for S. frugiperda . Western China is one of the main wheat and corn producing areas in China. Clarifying the potential geographical distribution of S. frugiperda in western China is essential for early warning as well as prevention and control.

Impacts of meteorological factors and ozone variation on crop yields in China concerning carbon neutrality objectives in 2060

Carbon neutrality objectives affect meteorology and ozone (O3) concentration in China, both of which would influence crop yields, thus food security. However, the joint impact of these two factors on crop yields in China is not clear. In this study, we investigated future trends in China's maize, rice, soybean, and wheat yields under a carbon-neutral scenario considering both regional emission reduction and global climate change in 2060. By combining a process-based crop model (Agricultural Production Systems sIMulator, APSIM) with O3 exposure equations, the impacts of regional emission reduction and global climate change were studied.The results suggest that regional emission reduction dominated the increase in yield by reducing the O3 concentration, whereas global climate change led to yield loss mainly through meteorological factors. The national yield decreases for the four crops ranged from 1.0% to 38.0% owing to meteorological factors, while O3 reduction resulted in additional yield increases ranging from 2.8% to 7.0%. The combined effect of carbon neutrality, which included both meteorological factors and O3 concentration, resulted in changes to the yields of maize, rice, soybean, and wheat of +4.3%, -7.3%, -24.0%, and -31.7%, respectively.It seems that crop production loss caused by meteorological factors in 2060 would be mitigated by the O3 reduction. Given the advantages of declining O3 concentration, regional emission reduction would likely benefit crop growth. However, global climate change may offset the benefits and threaten food production in China. Therefore, more strict emission reduction policies and global climate change mitigation actions are necessary to ensure food security in China.

Historical nitrogen fertilizer use in China from 1952 to 2018

Abstract. China ranks in the highest position for nitrogen (N) fertilizer consumption in the world. Although N fertilizer use has greatly contributed to the China's food production, this has also caused an unprecedented alteration in the biogeochemical cycles and endangered terrestrial and aquatic ecosystems. Existing use of N fertilizers in China, as shown by digital maps, is usually coarse in resolution and intermittently covered with a biased gridded dataset. Here, we have reconstructed a historical, annual N fertilizer use dataset in China and resampled it to 5 km×5 km resolution, covering the period from 1952 to 2018 by integrating improved cropland maps. Results showed that most of the N input was directly applied as N-only fertilizer, while the contribution from compound fertilizers has ranged between 16 % and 24 % since 1980. The national total N fertilizer input increased from 0.06 Tg N yr−1 (0.05 g N m−2 yr−1) in 1952 to 31.15 Tg N yr−1 (18.83 g N m−2 yr−1) in 2014 and then decreased to 28.31 Tg N yr−1 (17.06 g N m−2 yr−1) in 2018. Despite the total N input decreasing by 9.1 % (2.84 Tg N yr−1) from 2014 to 2018, the N input from compound fertilizers has increased by 6 % (0.43 Tg N yr−1) during the corresponding period. The previous Food and Agriculture Organization (FAO) data-based N fertilizer products in China overestimated N use in low cropland coverage areas but underestimated N use in high cropland coverage areas. However, our newly reconstructed data have not only corrected the existing biases and improved the spatial distribution but have also shown that vegetable and other crops (e.g., orchards), but not grain crops, are the most intensively fertilized crops in China, implying the importance of quantifying greenhouse gas (GHG) emissions from these croplands. We argue that the reconstructed, spatially explicit N fertilizer use data in this study are expected to contribute to better understanding of biogeochemical cycles, including the simulations of GHG emissions and food production in China. The spatially explicit N fertilizer use and the crop-specific N fertilizer use datasets are available via an open data repository (https://doi.org/10.6084/m9.figshare.21371469.v1; Yu, 2022).

Disintegrating the impact of climate change on maize yield from human management practices in China

Climate warming has posed one of the greatest threats to global food security during the 21st century. Evidence suggests that such a threat could be partly offset by promoting food production through human management. Most studies have focused on quantifying the impact of climatic factors on food quantity. However, the contributions of human management practices, including fertilization and irrigation, to food production are yet to be comprehensively understood. Using integrated information on climate, fertilizer use, and irrigation water allocation across China's 208 prefecture-level administrative divisions, as well as four spatial panel models, we have successfully disintegrated the relative effects of climate change and human management practices on China's maize yield. From 1982 to 2013, the average maize yield in maize planting regions in China increased by 1.7 times. The overall impact of human management (fertilizer use and irrigation) on maize yield was higher than that of climate change (based on the optimal spatial Durbin model where the coefficients of most factors were significant at p < 0.01; R2 = 0.65). The vapor pressure deficit (VPD) was the main influencing factor on maize yield followed by nitrogen and phosphorus (N&P) fertilizer use, precipitation, and diurnal temperature range (DTR) respectively. For example, maize yield would decrease by 15.0% per 0.1 kPa increase in VPD and increase by 29% per 10 g added in N&P fertilizer per square meter. Specifically, the VPD negatively influenced the maize yield in the Northern spring and the Southwest maize region, while the increased temperature negatively influenced the maize yield in the Huang-Huai spring-summer maize region. The N&P fertilizer use, precipitation, and diurnal temperature range all positively influenced the maize yield. N&P fertilizer use in the South maize region had a greater effect on improving maize yield than the other regions. The yield in the South maize region benefited more from human activities. This research could provide a timely reference for improving food production in China's maize planting regions and maintaining food security.

Consumers' knowledge, attitude, and behavior towards antimicrobial resistance and antimicrobial use in food production in China.

BackgroundAntimicrobial resistance (AMR) can be induced by overuse or misuse of antimicrobials. Few researches were involved in consumers' knowledge and attitude toward antimicrobial use (AMU) in food production. This study was designed to investigate the knowledge and awareness, perception, and attitude of Chinese consumers toward AMU in food production. Their behavior, purchase intention of antimicrobial-free food products, and confidence in information sources were also investigated.MethodsAs a descriptive cross-sectional study, an online electronic survey questionnaire was conducted between February 25 and March 8, 2022, involving 1,065 consumers in China. Factor analysis was conducted to identify underlying patterns of the attitudes and information sources. Spearman correlations were employed to determine the relationship between knowledge, attitudes and the intention to pay extra. The differences in knowledge and attitudes were performed by independent t-test and one-way analysis of variance (ANOVA) test, and the difference in intention was performed by Chi-square test, when compared with demographic factors.ResultsThe findings showed that even though 75.0% of them heard of AMR, and 48.2% knew the definition of AMR, the level of consumers' knowledge of AMU in farming production and food regulations in China was not high (48.9% of participants replied correctly). About half viewed AMU and AMR as a potential risk to their health. Of these participants, 61.3% claimed that they were more likely looking for specific information about AMU on food packaging, and 58.3% changed their eating or cooking habits due to the concern. In addition, 79.8% were willing to pay extra for antimicrobial-free food products. Information sources from professionals and authorities were considered more accurate than those from media, the internet, word of mouth, and others.ConclusionsChinese consumers had insufficient knowledge and neutral attitudes about AMU in farming production and food regulations in China. A large proportion of the participants were willing to purchase antimicrobial-free food products. Most of them obtained related information from the media. This study highlighted the importance of updated education and effective communication with consumers in China. It helps to develop the reliable foodborne AMR surveillance system along food chain and improve government communication and consumer awareness.

Changes in Cultivated Land Loss and Landscape Fragmentation in China from 2000 to 2020

Cultivated land area and fragmentation are two crucial elements that influence food production in China. However, few studies have analyzed the fine-grained changes in both the area and the fragmentation of cultivated land from a national perspective. Using a 30 m annual land-cover dataset with the help of cultivated land area (CA) and a newly constructed coupling landscape fragmentation index (CLFI), this research identified the spatial distribution characteristics of both the area and the landscape fragmentation of cultivated land in Chinese counties and simultaneously analyzed the changes in the above two elements since the beginning of the 21st century. The results showed that the distribution pattern of CA in China’s counties was large in the north and small in the south. During the first two decades of the 21st century, the total CA of China decreased, but the decrease rate decreased from 2.91% in 2000–2010 to 0.41% in 2010–2020; in contrast, the CLFI of China showed an increasing trend, but the increase rate also decreased, from 4.06% in 2000–2010 to 0.51% in 2010–2020. Spatially, from 2000 to 2010, there was an obvious reverse distribution pattern between counties with large CA changes and those with large CLFI changes; however, this pattern became less obvious from 2010 to 2020. Urban expansion, sloping land conversion programs and other ecological protection programs, and land development and consolidation programs were major causes of changes in the CA and CLFI across China. The findings of this research provide a data basis and scientific support for the protection and large-scale utilization of cultivated land, where this information is necessary to ensure food security.

Isolation and Molecular Characterization of Plant-Growth-Promoting Bacteria and Their Effect on Eggplant (Solanum melongena) Growth

In recent years, the optimum development of land resources has become an important task for ensuring the security of food production in China. Soil microorganisms have been considered to play an important role in conferring soil fertility and productivity. In order to obtain the plant-growth-promoting bacteria in newly reclaimed land, a total of 988 bacterial strains were isolated from nine soil samples collected from different sites in wastelands in Hangzhou (Zhejiang Province, China), a rural mountainous area. Among them, five strains exhibited substantial potential of phosphate solubilization, nitrogen fixation, siderophore production and indole acetic acid production at both pH 5.0 and pH 7.0, and also promoted eggplant growth in immature soil from newly reclaimed land. Furthermore, bacterial strains ZJ62 and ZJ3-12 were identified as Pantoeadispersa and Pantoea ananatis, respectively, while strains ZJ5, ZJ9 and ZJ174 were identified as Burkholderiaarboris, Burkholderia pyrrocinia and Burkholderia pyrrocinia, respectively, based on colony morphology observation and phylogenetic analysis of 16S rDNA and the housekeeping genes sequences. Overall, the result of this study showed that the 5 obtained bacterial strains have a great potential in promoting plant growth in immature soil from newly reclaimed land.

Nutrient-rich locusts serve as an ingredient for food production in China

As a major group of insects, locusts frequently cause agricultural damage, however, they have high economic value due to their rich nutritional content. In this paper, we systematically summarise the research results on the species, distribution, and functional composition of locusts in China over the past three decades and analyse the differences in research results in relation to experimental methods, locust species, and the experimental dates. In addition, we also introduce the methods for obtaining mass locusts, and discuss the edible, medicinal and feed usage of locusts, and prospect the exploitation of locust resources in order to provide a reference for locust-related research.