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[学术文献] Comprehensive evaluation model for water environment carrying capacity based on VPOSRM framework: A case study in Wuhan, China 进入全文

Sustainable Cities and Society

Constructing an objective and reasonable evaluation index system was the key to scientifically evaluate the carrying capacity of water environment. The paper proposed a conceptual framework of vigor–pressure–organization-state-resilience-management (VPOSRM) and chose 22 indicators to establish the evaluation index system. The projection pursuit model optimized by quantum genetic algorithm was used to calculate comprehensive evaluating indicators. The results showed that Wuhan's Water Environmental Carrying Capacity (WECC) increased in 2006–2015 and the evaluation grade changed from grade IV unhealthy to grade III health. Through analysis the influence weights of indicators, per capital water resource, the proportion of irrigated area in commonly used cultivated land, water consumption of ten thousand Yuan industrial value-added, percentage of collective disposal of sewage and population density were top 5 indicators that affected Water Environmental Carrying Capacity significantly. By analysis the evaluation results, the improvement of WECC was attributed to the increase of daily sewage treatment capacity in resilience subsystem. The decrease of per capital water resources was the real reason for the change of WECC in 2010–2011. The development of agriculture and industry had put Wuhan city under great pressure for many years.

[学术文献] Utilizations of agricultural waste as adsorbent for the removal of contaminants: A review 进入全文

Chemosphere

In recent years, various industrial activities have caused serious pollution to the environment. Due to the low operating costs and high flexibility, adsorption is considered as one of the most effective technologies for pollutant management. Agricultural waste has loose and porous structures, and contains functional groups such as the carboxyl group and hydroxyl group, so it can be invoked as biological adsorption material. Agricultural waste gets the advantages of a wide range of sources, low cost, and renewable. It has a good prospect for the comprehensive utilization of resources when used for environmental pollution control. This article summarized the current research status of agricultural waste in adsorbing pollutants, which pointed out the influencing factors of adsorption, expounded the adsorption mechanism of biological adsorption and introduced the related parameters of adsorption, proposed the application of adsorbents in engineering including adsorption in liquid and gas phases, at the same time it gave the future development prospect of agricultural waste as adsorbent.

[会议论文] 农民绿色发展理论与二十一世纪国外绿色农业发展实践研究 进入全文

建国70周年与人的发展经济学——2019年中国·人的发展经济学学会学术会议论文集

农民绿色发展对中国农民的全面发展有着至关重要的意义和作用,国内外的农民绿色发展理论为农民绿色发展提供了丰富的理论支撑。而21世纪以来的国外的农民绿色发展实践则易绿色生态农业为基础。近20年来的国外绿色生态农业发展具有起步晚、势头猛、模式相近等特点,推动绿色生态农发展的关键要素也可分为法律、政府、科技、行业和市场等几个方面。国外绿色生态农业发展经验为中国农民发展绿色生态农业,实现绿色发展,推进全面发展提供了很多有益经验,但在借鉴过程中也要因地制宜、重视国内外区别和差异性。

[前沿资讯] US farm bankruptcies spike up 24% in September 进入全文

AgroNews

U.S. farm bankruptcies in September surged 24% to the highest since 2011 amid strains from President Donald Trump's trade war with China and a year of wild weather. Growers are also becoming increasingly dependent on trade aid and other federal programs for income, figures showed in a report by the American Farm Bureau Federation, the nation's largest general farm organization. The squeeze on farmers underscores the toll China's retaliatory tariffs have taken on a critical Trump constituency as the president enters a re-election campaign and a fight to stave off impeachment. The figures also highlight the importance of a "phase one" deal the administration is currently negotiating with Beijing to increase agriculture imports in return for a pause in escalating U.S. levies. Almost 40% of projected farm profit this year will come from trade aid, disaster assistance, federal subsidies and insurance payments, according to the report, based on Department of Agriculture forecasts. That's $33 billion of a projected $88 billion in income. The trade war and two straight years of adverse weather rattled farmers already facing commodity price slumps. 

[前沿资讯] Agriculture occupies 41% of Brazil's total land area 进入全文

AgroNews

The Brazilian Institute of Geography and Statistics (IBGE) recently released their Agricultural Census 2017 which indicated that agriculture occupied 41% of Brazil's land area. Brazil has a total land area of 851.4 million hectares (2.1 billion acres) with a total of 5,073,324 farming operations which occupy 351.2 million hectares (867.4 million acres) or 41% of Brazil's total land area. Compared to ten years earlier, the agricultural area in Brazil increased 5.8% while the number of farming operations declined 102,312. The census was conducted between October 1, 2017 and February 28, 2018 and data was collected on 7.5 million addresses. The number of large farming operations increased especially in the northern agricultural frontier areas while the number of farming operations decreased in northeastern Brazil due to periodic droughts over the last ten years. The percent of the types of agricultural operations were as follows: 15.8% annual crops, 2.2% permanent crops, 31.9% planted pastures, 13.4% natural pastures, 30.3% natural forested areas within the farming operations, 2.4% planted forestry plantations. A striking take away from the census data is how little of Brazil is dedicated to row crop production. Only approximately 7% of Brazil's land area is dedicated to row crop production with soybeans being the main crop. That means there is tremendous potential for the expansion of soybean acreage in the future if there are favorable market conditions. According to the Brazilian Minister of Agriculture, Brazil is currently the third largest food producer in the world and it will continue to gain market share for the foreseeable future.

[前沿资讯] International Institute of Tropical Agriculture unveils digital tools for agricultural transformation 进入全文

AgroNews

The International Institute of Tropical Agriculture (IITA) on Friday unveiled a suite digital tools that are helping in transforming farming, improving yield and livelihoods of farmers. The digital tools include the cassava, Goseed and yam seed trackers; Akilimo, IITA Herbicide Calculator, e-commerce site and IITA News App. The seed trackers are mobile platforms designed to help in seed production planning, seed traceability, seed inventory, real-time tracking of production status, seed certification, marketing, information resources, among others. The IITA Herbicide Calculator is a mobile app that was developed by the Cassava Weed Management Project and deployed across Nigeria and other African countries and is being used in controlling weeds in cassava.  The App helps growers to estimate correct amount of herbicides to be added to knapsack sprayers, helping farmers to avoid underdosing or overdosing which leads to environmental pollution and weeds resistance. Akilimo on the other hand, is a mobile agronomy advisory tool developed by the African Cassava Agronomy Initiative (ACAI) that combines weed management/best plantig, fertilizer recommendations, scheduled planting.

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