Preliminary Study on the Ecological Agriculture Development Model of"Pennisetum sineseRoxb-Rocky Desertification Control-Edible Mushrooms"in Guizhou Province

In Guizhou Province, the area of rocky desertification land is 3.023 8 million hm^2, accounting for 17.16% of total area of land in the province. Rocky desertification is the most important ecological problem that restricts the economic and social development in Guizhou, so the primary task of ecological construction in Guizhou Province is to curb rocky desertification. How to effectively, efficiently and persistently use rocky desertification land is not only the key to the improvement of ecological environment, but also an urgent problem solved for local people's survival and anti-poverty. Due to having developed roots, growing fast, high yield of grass, strong resistance to drought, and high regeneration capacity, Pennisetum sinese Roxb has become a new method to control rocky desertification. How to use P. sinese Roxb efficiently becomes the key to the ecological control of rocky desertification by P. sinese Roxb. In this study, the ecological agriculture development model of "P. sinese Roxb-rocky desertification control-edible mushrooms" was studied, and the effect of cultivating Pleurotus eryngii with P. sinese Roxb in rocky desertification land was analyzed. Moreover, an outlook for the application of P. sinese Roxb in rocky desertification areas of Guizhou was given.

The Construction of Ecological Agriculture in Gongcheng County and Its Development Ideas

On the basis of survey of current situations of eco-agricultural construction in Gongcheng County, major "Cultivation + Methane + Planting" triple model of ecological agriculture in Gongcheng County is presented. Then, the eco-agricultural benefits of Gongcheng County are analyzed from three aspects, namely economic, social and ecological benefits. Through summing up, the eco-agricultural construction of Gongcheng County has following problems: imperfect ecological technological system; follow-up service level and ability to be improved; slow in unified planning and design and industrialization step. Finally, ideas of further development of ecological agriculture in Gongcheng County are put forward. These include proper planning and overall management, extending ideas and deepening eco-agricultural construction system; strengthening development of ecological tourism; and perfecting social service system for ecological agriculture.

Investment Projects in Dangshan——The National Ecological Agriculture County

Dangshan County is situated in the mostnortherly part of Anhui Province, acontiguous area of fourprovinces(Jiangsu, Shandong, Henan andAnhui) and six counties(Fengxian, Shanxian,Yucheng, Xiayi, Yongcheng and Xiaoxian).The County is named after Mount Mangdangand Mount Dangshan in the territory. TheLonghai Railway and National Highway 310pass through in parallel the central part of thecounty area, and the ancient Yellow Rivercourse lies in the northern part of the country,extending a hundred li(50 km). The totalland area of the county is 1192.94 sq km, ofwhich the cultivated land area is 904 thousandmu. 650 thousand mu of orchards cover thefields linking to the villages. It is major

Research on the Development Model of Ecological Agriculture in Loess Hilly-Gully Region of Northern Shannxi, China

On the Loess Plateau of China, facing the vulnerable environment, local people have to try their best to guarantee the security of food, and at the same time, to control the most serious soil erosion in the world. The paper introduces two typical models of ecological agriculture: ecological agriculture with commodity and agriculture with soil and water conservation. According to the local natural condition, the model of eco-agriculture with commodity could be characterized by the structure of “agriculture-byproduct”, “agriculture-fruit” or “agriculture-forestry-husbandry”. The development of agriculture with soil and water conservation has decreased the soil erosion rate from 12, 184 ton/kin^2 in 1980 to 458.4 ton/kin^2 in 1999, while the farmers' income has increasingly risen. Analyses on the two models' benefits both in terms of ecological and agricultural economy show that there is a great possibility to construct or restore good eco-environment with comprehensive control in the hilly-gully area of north Shannxi. Further more, the paper points out the potential problems of foodstuff production and stockbreeding development in forming ecological agriculture and eco-environmental restoration.

Evaluation on Ecological Agriculture Benefit and Coordinated Development Level in Henan Province

[Objective] The aim was to establish theevaluation index system of ecological agriculture benefit in Henan Province to assess its ecological agriculture benefit and coordinated development level. [Method] Based on the existing evaluation index system of ecological agriculture, the evaluation index system of ecological agriculture benefit in Henan Province was established by means of factor analysis from the aspects of economic benefit, social benefit and ecological benefit, so as to assess the ecological agriculture benefit and coordinated development level of cities at prefecture level in Henan Province. [Result] Zhengzhou City had the highest development level in ecological agriculture in Henan Province, and coordination level was the highest in Anyang City, while coordinated development level was the highest in Zhengzhou and lowest in Sanmenxia City. [Conclusion] The study could provide reference for the evaluation on ecological agriculture benefit in China.

Thoughts on Present Situation of Development of Rural Animal Husbandry and Its Relationship with Construction of Ecological Agriculture and Revitalization of Rural Industry

After several rounds of phased ups and downs of development,rural animal husbandry finally presents a shrinking and depressed development situation under the comprehensive action of the failure of transformation and upgrading and the increasing production costs and breeding risks.Actively exploring and guiding the healthy and sound development of rural animal husbandry is not only an important measure to promote the construction of ecological agriculture,but also the main starting point to realize the revitalization of rural industry.This paper analyzes the present situation of the development of rural animal husbandry in recent years,the influence of animal husbandry on the construction of ecological agriculture and the revitalization of rural industry,and puts forward the corresponding measures,in order to promote the steady and efficient development of animal husbandry in the grand strategy of revitalizing rural industry.

Development of Ecological Agriculture in Xiantao City

This paper takes ecological agriculture as the starting point.On the basis of field investigation and research on the basic situation of the development of ecological agriculture in Xiantao City,this paper focuses on the development models of ecological agriculture in some typical regions such as Xianfeng Village,Zhanggou Town,Chenchang Town and Shazui Street Office in Xiantao City.This paper analyzes many problems that affect and restrict the development of ecological agriculture in Xiantao City,and puts forward some measures and suggestions to promote the development of ecological agriculture in Xiantao City.

Ecological Agriculture in Liuminying Village

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Ecological Agriculture. Integrating Low Input, High Productive Farming with Wildlife Conservation. Results from the Experimental Farm La Combe, Drome France

Wildlife conservation must be integrated with energy and resource efficient agriculture for the human population to survive. Modern high input energy and resource inefficient agriculture does not address these problems. An efficient food producing system which marries wildlife conservation with resource and energy efficient human food production is needed. This is Ecological Agriculture, modelled on how natural ecosystems work. It is defined as: The establishment and maintenance of a diversified, self-sustaining low input farming system managed to maximize net production without causing large or long term changes to the environment. It must be economically viable, and ethically and aesthetically acceptable [1]. Forty years of research on 4 experimental farms have assessed the practicality of this approach (results previously published). The 5th experimental farm in the mountains of the Pre Alps has completed its 10 years. The results are discussed in relation to the tenets of Ecological Agriculture. The techniques previously developed have allowed the results to fulfil the majority of the demands of efficient ecological agriculture and to produce food for 20 families from the farm’s resources despite the difficult climate, topography and soils. It is shown how energy and resource inefficient the omnivorous animals (poultry and pigs) are, compared to herbivores. The species diversity has increased and the whole farm is a nature reserve. Aesthetic and ethical problems have been addressed with an emphasis on a life of quality for farm animals.

Contrastive Research on Domestic and Foreign Ecological Agriculture Policies

In the first place,the definitions of ecological agriculture defined by scholars both at home and abroad are introduced.In the second place,the domestic and foreign ecological agriculture policies are expounded.Through contrastive research on the domestic and foreign ecological agriculture polices,the problems in the development of ecological agriculture in China are found.By mirroring the western experiences in developing ecological agriculture,the countermeasures and relevant suggestions are put forward from the perspective of government.The first one is to increase the subsidies from the government to ecological agriculture.The second one is to clarify the standard of ecological agriculture construction.The third one is to promote the industrialization of ecological agriculture.The fourth one is to strengthen the construction of ecological demonstration region and ecological village.

COUPLED PHYSICAL-ECOLOGICAL MODELLING IN THE CENTRAL PART OF JIAOZHOU BAY Ⅱ. COUPLED WITH AN ECOLOGICAL MODEL

Sharples’ 1 D physical model employing tide wind driven turbulence closure and surface heating cooling physics, was coupled with an ecological model with 9 biochemical components: phytoplankton, zooplankton, shellfish, autotrophic and heterotrophic bacterioplankton, dissolved organic carbon (DOC), suspended detritus and sinking particles to simulate the annual evolution of ecosystem in the central part of Jiaozhou Bay. The coupled modeling results showed that the phytoplankton shading effect could reduce seawater temperature by 2℃, so that photosynthesis efficiency should be less than 8%; that the loss of phytoplankton by zooplankton grazing in winter tended to be compensated by phytoplankton advection and diffusion from the outside of the Bay; that the incident irradiance intensity could be the most important factor for phytoplankton growth rate; and that it was the bacterial secondary production that maintained the maximum zooplankton biomass in winter usually observed in the 1990s, indicating that the microbial food loop was extremely important for ecosystem study of Jiaozhou Bay.

Overview of Ecological Agriculture with High Efficiency

From the presentation, connotation, characteristics, principles, pattern, and technologies of ecological agriculture with high efficiency, we conduct comprehensive and systematic analysis and discussion of the theoretical and practical progress of ecological agriculture with high efficiency. (i) Ecological agriculture with high efficiency was first advanced in China in 1991. (ii) Ecological agriculture with high efficiency highlights "high efficiency", "ecology", and "combination". (iii) Ecological agriculture with high efficiency is characterized by diverse organisms, good environment, good structure, powerful function, good quality, high benefit, low emission, sustainability. (iv) The yield increase and efficiency increase principle of ecological agriculture with high efficiency lies in full land use, three-dimensional light use, sufficient use of season, multi-layer water consumption, efficient fertilizer consumption, symbiosis and mutual supplement, ecological disaster reduction, recycling. (v) The typical pattern of ecological agriculture with high efficiency includes three-dimensional use pattern, biological symbiosis pattern, multi-industry combination pattern, industrial extension pattern, technology-driven pattern, environmental renovation pattern, resource recycling pattern, leisure and sight-seeing pattern. (vi) The key technologies of ecological agriculture with high efficiency include resource-saving technology, water and fertilizer regulation technology, biological technology for increasing soil fertility, disaster prevention and mitigation technology, comprehensive utilization technology, water conservation technology, structural adjustment technology, energy development technology, watershed control technology, and modern high-tech technology.

Stability and Uniform Boundedness for a Class of Anaerobic Digestion Ecological Models

Stability, boundedness and persistence are three important aspects for an ecological model. In this paper, a further analysis of a class of anaerobic digestion ecological models is performed. Based on the Liupunov Method, the local stability of all equilibria in the system is got. According to the vector fields described by the system, the proof of the boundedness of the solution on the anaerobic digestion processes is completed in three steps. The method proposed in the discussion on the boundedness can be generalized to the similar problems. Results in this paper give information on how to run the ecological system well by adjusting the system parameters.

Optimization of Urban Ecological Network Based on MSPA-MCR Model: A Case Study of Jingzhou City

As a key carrier supporting urban ecological health and living environment quality,urban ecological network is a key focus of current urban green space research.Jingzhou City of Hubei Province is taken as the research object.Relying on GIS technology platform,MSPA method is used to analyze the landscape pattern of Jingzhou City.On this basis,the landscape connectivity evaluation method is used to accurately identify and extract the source areas with important ecological value in Jingzhou City.Then,the normalization method and weighting method are combined to create a resistance factor evaluation system to construct the resistance surface.Based on the MCR model,the ecological network of Jingzhou City is successfully constructed,and targeted spatial optimization strategies and development suggestions are proposed.

Data Analyses and Parallel Optimization of the Regional Marine Ecological Model

Under the joint influence of high-intensity human activities and cli-mate change,the coastal ecological environment is deteriorating,and the ecologi-cal environment security and the sustainable development of the marine economy are seriously threatened.Therefore,it is of great significance to establish a high-resolution ecological environment operational forecasting system.To meet the run time requirements of the ecological operational forecasting system,a vari-ety of parallel optimization methods were proposed to improve the operation efficiency of the model.First,based on the National Marine Environmental Fore-casting Center’s Lenovo cluster,the ROMS benchmark experiment was expanded to the 4000 Processes scale.A good speedup was obtained by the experiment.The ROMS model was analysed with strong scalability.Second,in the hydrodynamic-ecological simulation experiment of the Bohai Sea-Yellow Sea-East China Sea,by optimizing Vector,InfiniBand,and Parallel I/O,the performance of the model can be improved by 270%while maintaining the same computing resources.That computing resources were more reasonably used lay the foundation for the operational forecast.

Influence of ecological function protection zone on the water conservation in Gansu-Qinghai Contiguous Region of the upper Yellow River

The implementation of Ecological Function Protection Zone(EFPZ)policy is significant for the ecological restoration and conservation of soil and water in the territory space.This manuscript analyzed and quantified the impact of EFPZ on the regional water conservation function,based on land use data from 2005,2008,2010,2015 and 2020,by conducting a counterfactual simulation along with the GeoSOS-FLUS model and the InVEST model.The results demonstrate that the delineation of EFPZ can significantly influence the water conservation.(1)From 2010 to 2020,as the EFPZ was implemented,the water conservation in the study area was increasing year by year,with a growth rate of 0.03×10^(8) m^(3)∙a^(-1).On the other hand,the simulated water conservation capacity without the implementation of EFPZ decreased year by year,with a decrease rate of 0.01×10^(8) m^(3)∙a^(-1).(2)The EFPZ accounts for only 23%of the total area,but the contribution rate of water conservation reaches 80%.The actual values of water conservation and average water yield per unit pixel in the EFPZ show an increasing trend both internally and externally,while the counterfactual simulation values exhibit a decreasing trend.(3)The water conservation is much higher within the EFPZ than without EFPZ.The implementation of EFPZ has a significant effect on the improvement of the water conservation capacity in Maqu EFPZ and Yellow River Source EFPZ.The protection effectiveness should be enhanced in Qilian Mountain EFPZ and afforestation activities need to be carefully considered in Loess Plateau EFPZ.

Changes of coastline and tidal flat and its implication for ecological protection under human activities: Take China’s Bohai Bay as an example

The change processes and trends of shoreline and tidal flat forced by human activities are essential issues for the sustainability of coastal area,which is also of great significance for understanding coastal ecological environment changes and even global changes.Based on field measurements,combined with Linear Regression(LR)model and Inverse Distance Weighing(IDW)method,this paper presents detailed analysis on the change history and trend of the shoreline and tidal flat in Bohai Bay.The shoreline faces a high erosion chance under the action of natural factors,while the tidal flat faces a different erosion and deposition patterns in Bohai Bay due to the impact of human activities.The implication of change rule for ecological protection and recovery is also discussed.Measures should be taken to protect the coastal ecological environment.The models used in this paper show a high correlation coefficient between observed and modeling data,which means that this method can be used to predict the changing trend of shoreline and tidal flat.The research results of present study can provide scientific supports for future coastal protection and management.

Influencing Factors and Prediction of Risk of Returning to Ecological Poverty in Liupan Mountain Region,China

China has resolved its overall regional poverty in 2020 by attaining moderate societal prosperity.The country has entered a new development stage designed to achieve its second centenary goal.However,ecological fragility and risk susceptibility have increased the risk of returning to ecological poverty.In this paper,the Liupan Mountain Region of China was used as a case study,and the counties were used as the scale to reveal the spatiotempora differentiation and influcing factors of the risk of returning to poverty in study area.The indicator data for returning to ecological poverty from 2011-2020 were collected and summarized in three dimensions:ecological,economic and social.The autoregressive integrated moving average model(ARIMA)time series and exponential smoothing method(ES)were used to predict the multidimensional indicators of returning to ecological poverty for 61 counties(districts)in the Liupan Mountain Region for 2021-2030.The back propagation neural network(BPNN)and geographic information system(GIS)were used to generate the spatial distribution and time variation for the index of the risk of returning to ecological poverty(RREP index).The results show that 1)ecological factors were the main factors in the risk of returning to ecological poverty in Liupan Mountain Region.2)The RREP index for the 61 counties(districts)exhibited a downward trend from 2021-2030.The RREP index declined more in medium-and high-risk areas than in low-risk areas.From 2021 to 2025,the RREP index exhibited a slight downward trend.From 2026 to2030,the RREP index was expected to decline faster,especially from 2029-2030.3)Based on the RREP index,it can be roughly divided into three types,namely,the high-risk areas,the medium-risk areas,and the low-risk areas.The natural resource conditions in lowrisk areas of returning to ecological poverty,were better than those in medium-and high-risk areas.

Optimization of water-urban-agricultural-ecological land use pattern:A case study of Guanzhong Basin in the southern Loess Plateau of Shaanxi Province,China

Extensive land use will cause many environmental problems.It is an urgent task to improve land use efficiency and optimize land use patterns.In recent years,due to the flow decrease,the Guanzhong Basin in Shaanxi Province is confronted with the problem of insufficient water resources reserve.Based on the Coupled Ground-Water and Surface-Water Flow Model(GSFLOW),this paper evaluates the response of water resources in the basin to changes in land use patterns,optimizes the land use pattern,improves the ecological and economic benefits,and the efficiency of various spatial development,providing a reference for ecological protection and high-quality development of the Yellow River Basin.The research shows that the land use pattern in the Guanzhong Basin should be further optimized.Under the condition of considering ecological and economic development,the percentage change of the optimum area of farmland,forest,grassland,water area,and urban area compared with the current land use area ratio is+2.3,+2.4,-6.1,+0.2,and+1.6,respectively.The economic and ecological value of land increases by14.1%and 3.1%,respectively,and the number of water resources can increase by 2.5%.

Spatiotemporal Evolution of Ecological Quality in Typical Karst Ecologically Fragile Areas Based on Remote Sensing Ecological Indexes

Fast and effective remote sensing monitoring is an important means for analyzing the spatio-temporal changes in ecological quality in fragile karst regions.This study focuses on Guanling Autonomous County,a national-level demonstration county for comprehensive desertification control.Based on Landsat TM/OLI remote sensing image data from 2005,2010,2015,and 2020,remote sensing ecological indices were used to analyze the spatio-temporal changes in ecological quality in Guanling Autonomous County from 2005 to 2020.The results show that:①the variance contribution rates of the first principal component for the four periods were 66.31%,71.59%,63.18%,and 75.24%,indicating that PC1 integrated most of the characteristics of the four indices,making the RSEI suitable for evaluating ecological quality in karst mountain areas;②the remote sensing ecological index grades have been increasing year by year,with an overall trend of improving ecological quality.The area of higher-grade ecological quality has increased spatially,while fragmented patches have gradually decreased,becoming more concentrated in the low-altitude areas in the northwest and east,and there is a trend of expansion towards higher-altitude areas;③the ecological environment quality in most areas has improved,with the improvement in RSEI spatio-temporal variation becoming more noticeable with increasing slope.Areas of higher-grade quality appeared in 2010,and the range of higher-grade quality expanded with increasing slope.