基于粮食安全视角的海洋农业发展价值分析

论文从粮食安全的视角分析了我国陆上粮食生产面临的挑战,阐释了现代食物观,认为维护我国粮食安全需要节流开源发展海洋农业,构建现代食物观,通过多种途径维护食物安全;论文阐述了海洋农业的基础地位,指出了其在完善农业产业链条、维护粮食安全体系完整等方面的基础性价值,并提出了发展我国海洋农业的政策建议。     

Agriculture on the edge: strategies to abate urban encroachment onto agricultural lands by promoting viable human-scale agriculture as an integral element of urbanization

In the Greater Vancouver region (Canada) tensions exist where urbanization encroaches onto agricultural land. A recently issued white paper proffered ideas to stimulate discussion on land-use plans and public policies to encourage and enhance agriculture while accommodating a doubling of the region's population. It evoked a visceral response from local and regional politicians, planners and agrologists who saw it as an heretical attempt to undermine land conservation. Proponents saw innovative strategies to ameliorate entrenched antipathy between competing perspectives. The core arguments and corresponding critique, outlined in this paper, bring to light elements of a broader debate about the vitality and sustainability of agriculture in British Columbia, as elsewhere, centring on issues of food security (supply) and food sovereignty (control) within two competing agricultural paradigms: human-scale agri-food systems and conventional industrial agri-business. Municipal enabled agriculture (MEA) is advanced as a catalyst for the full integration of the agri-food system within the planning, design, function, economy and community of cities and vice versa. MEA can make significant contributions to local and regional economies and has the potential to alter the way communities are designed to reduce unsustainability, planned to incorporate resilience, and organized so that they flourish socially and culturally.     

Multifunctionality of agriculture: an inquiry into the complementarity between landscape preservation and food security

Without support, the levels of agricultural public goods suchas food security and landscape preservation would fall shortof demand in high-cost countries. However, as demonstrated byNorway as a case study, the current level of support is disproportionatefrom a public goods perspective, and the policy instrumentsare badly targeted at the public goods in question. Becauseagricultural land is a major component of both food securityand landscape preservation, giving rise to a high degree ofcost complementarity between the public goods, it would be moreefficient to support land-extensive production techniques thanproduction per se.     

Cuban agricultural policy in the last 25 years. From conventional to organic agriculture

Political, social, economic and environmental changes undergone in Cuba in recent decades have led to several well-differentiated production models or systems, and have led to profound transformation of Cuban farmland. This article analyses those changes and transformations in three key stages or chronological periods of Cuban agricultural policy, the Green Revolution, the Special Period and Economic Reanimation. The analysis emphasizes the environmental, social and economic effects of each period, and especially, the change from a conventional intensive to an alternative or organic farming system, which has become an example to be followed.     

An African success: the case of conservation agriculture in Zimbabwe

This paper highlights the limiting factors of agricultural production in Zimbabwe and presents conservation agriculture (CA) as a potential solution to address many of these challenges. CA, based on the three principles of minimum soil disturbance, crop residue retention and crop rotations, targets low soil fertility, moisture deficits and low management standards through the use of soil-fertility-enhancing technologies (precision fertilizer application, crop rotations, sequencing and interactions), improved moisture use efficiency and higher standards of agronomic management practices. The paper also explains the role of CA in natural resource conservation as increasing productivity will reduce the land under crop production and increase the area under natural vegetation. Trends in the development of CA in the past five years and its current status in the country are explained, with the roles of different stakeholders outlined. Evidence on the impact of CA on both food security and the environment is presented. In conclusion, the paper looks at the various factors that may affect the spread of CA to different agro-ecological zones in the country.     

The emergence of urban agriculture: Sydney,Australia

Across the world the phenomenon of urban agriculture (UA) is defining itself after emerging from a mainly grass-roots response, evidenced in the Sydney Metropolitan Region by the Hawkesbury Harvest phenomenon and the Sydney Food Fairness Alliance, to powerful global forces which are negatively and paradoxically impacting on the quality of life of urban and farming communities. In the developed world these major forces include: (1) urban sprawl and its progressive sterilization of agricultural lands; (2) the supermarket dominance of food chains; (3) the fast food industry and associated health problems such as obesity; (4) globalization. The community-based promotion and marketing of local agriculture is causing some governments and public and private organizations throughout the world to recognize UA as a strategic mechanism to enable urban communities to deal with food security in the context of neo-liberalism, climate change, pandemics, natural disasters, human and environmental health, carbon footprint, biosecurity/terrorism, peak oil, waste management, and landscape and natural resource management. This paper explores the history of UA in the Sydney region. It is a narrative that allows for UA in the Greater Sydney Metropolitan area to draw on the experiences of other developed countries where UA is establishing its position.     

Valuation of environmental and social functions of the multifunctional Cypriot agriculture

The multifunctional farming sector in Cyprus poses threats on the island’s water resources, but highly contributes to the protection of the cultural identity and to the provision of incomes and employment in its rural areas. These services are externalities, as farmers are not remunerated in markets for the environmental and cultural services they provide, nor for the fact that they maintain vivid rural areas. This paper presents an application of the Choice Experiment method, in order to evaluate these non-traded outputs of Cypriot agriculture. The results of the empirical analysis demonstrate that the Cypriot public is in favor of a less intensive pattern of agriculture. Furthermore, Cypriots are willing to pay in order to mitigate adverse environmental effects of agriculture, to improve cultural heritage and to safeguard the continuation of farming trade on the island. The estimated benefits often exceed income losses from changes in the cropping pattern towards extensification, which verifies that EU rural development policies are regarded as beneficial by the public.     

Collaborative research on Conservation Agriculture in Bajío,Mexico: continuities and discontinuities of partnerships

Agricultural technologies are debated and contested. Studying the socio-political life of agricultural research can help us to understand why some particular technologies or pathways are favoured (and others not) and eventually why expectations are maintained or not. We studied the 30-year trajectory of practices of Conservation Agriculture in the central region of Mexico. The results of our interviews and literature review show how, over the course of time, Conservation Agriculture (CA) technology has successively changed from being referred to as Conservation Tillage, Direct Seeding, Conservation Agriculture and has now, finally become integrated within Sustainable Intensification. These changes are connected with revamped narratives and the applications of the latest research and development (R&D) paradigms. They were the result of new spaces for CA projects opening up after other spaces had closed, spaces that allowed the researchers, politicians, technicians and farmers to continue to engage in CA in a reconfigured way that fit the various agendas. The opening and closure of spaces for CA projects were the result of researchers being subject to, and taking advantage of, political changes and of politicians seeking new initiatives to support their agendas. This shows how research and politics are mutually dependent and how they generate a discontinuity of project interventions which, paradoxically, represent a continuity of agendas and research processes. As CA is both a complex and flexible technology, it has been possible to make it fit to accommodate the changing agendas of different actors.     

发展旱作农业和节水农业是干旱地区农业的出路

干旱灾害仍然是我国北方地区农业发展的最大威胁。北方干旱地区按自然条件可划分为若干类型区 ,但按照水利设施条件划分 ,可划分为无水利设施区域和有水利设施区域。无水利设施区域应以旱作农业为重点 ,有水利设施区域应以节水农业为重点。旱作农业、节水农业是两个相互交叉、相互区别的概念。在实践中 ,既要把握其共同点 ,把二者结合起来 ,又要把握其不同点 ,在不同区域实施不同增产技术。无水利设施区域要重点推广地膜覆盖、作物绿肥带状轮作培肥保墒、蓄水保墒耕作、秸秆覆盖、种植结构调整优化、窑窖蓄水灌溉等旱作农业技术。有水利设施区域要重点推广输水系统节水、田间节水、节水型井灌、非充分灌溉和局部灌溉等节水灌溉技术。要把发展旱作农业、节水农业作为下世纪农业发展的战略任务来抓 ,一是各级党政部门要增强紧迫感 ,尽快制定发展规划 ;二是要加大投入力度 ,用政策调动各方发展旱作、节水农业的积极性 ;三是要加强旱作、节水农业技术推广 ,探索不同区域农业增产增收新路子 ;四是要加大行政推动力度 ,办好样板工程。     

Conceptualising multifunctional agriculture from a global perspective: Implications for governing agricultural trade in the post-Doha Round era

The notion of multifunctional agriculture has been researched from diverse disciplines including economics, sociology, political economy, and geography since the URAA. In particular, the economics approach represents an attempt to tailor the concept of multifunctional agriculture to market- oriented WTO trade regime. The approach has been fundamentally troubled by the lack of concord among WTO member countries on the question of what constitutes multifunctional agriculture. This article redefines multifunctional agriculture as a concept encompassing six components that are extremely heterogeneous in their nature of external benefits. Upon examining different positions taken by the US, the EU, the Cairns group, LDCs, and the G10, this article develops a conceptual model explaining why the notion of multifunctional agriculture is conceived so differently across countries. The model posits that institutions, natural resources endowment, ecological conditions, farm policies, and culture/history unique to each country would determine the state of economic development and agricultural competitiveness in a country, which in turn shape the pattern of social demand for various components of multifunctional agriculture. The theorizing undertakes to overcome the Euro- centrism that has dictated the discourse of multifunctional agriculture since the URAA. Implications are discussed for the governance of agricultural trade in the post-Doha Round era.     

Putting the culture back into agriculture: civic engagement,community and the celebration of local food

This paper reports on the case study of a community-supported agriculture (CSA) farm in south-western Ontario, Canada. As an exemplar of urban agriculture, Fourfold Farm CSA operates from an alternative agriculture paradigm and is built upon the socio-ecological practices of civic engagement, community and the celebration of local food. Analysis of in-depth, key informant interviews with members of the CSA as well as the co-founders reveals the extent to which the farm is much more than a source of healthy, organic food. The paper outlines the ways the CSA operators and their members articulate a deeper endeavour to link urban food consumers with food producers through cultural activities. The discussion concludes with a call for more social research in agriculture as well as a broader effort to articulate the ways urban agriculture can contribute to putting the culture back into agriculture and creating sustainable systems of farming.     

传统农业时代乡村粮食安全水平估测

传统农业时代中国单位面积的粮食产量长期在世界处于领先地位,农业技术水平的提高在很大程度上降低了饥荒风险,减缓了饥荒的发生。隋唐以前粮食生产能力处于持续上涨阶段,粮食生产能力完全能够应对可能发生的饥荒,而且还可以供养更多的人口。宋元明时期粮食生产能力依然高于秦汉时期的水平。入清以后由于人口增殖过快,人口压力剧增,粮食供应空前紧张。清代中国人均粮食占有量倒退到2000多年前春秋战国时代的水平上,饥荒的频繁发生已经呈现出不可避免的恶化趋势。因此提高粮食产量水平成为20世纪中国最为关键的问题,在耕地资源基本开发殆尽的情况下,唯有采取改进农业技术提高单位面积产量的办法最为可行。战争和自然灾害是导致粮食波动的根本性因素,局部地区因此而出现粮食短缺,饥荒的发生成为可能。农民是粮食生产的主体力量,同时也是最易遭受饥荒危害的社会群体。中国传统社会农民生活水平长期处于贫困化的状态,直至20世纪中叶依然没有发生根本性变化。     

土地整理与农业可持续发展问题研究

江苏人口众多,土地资源紧缺,经济快速发展过程中土地的非农化速度很快,保护耕地增产粮食,促进农业的可持续发展问题随着人口、经济高速增长而日益受到重视。江苏省开展的土地整理进行农村土地资源的整合,保持耕地总量平衡,完善农业基础设施,有效地提高土地产出,从而促进土地的持续、高效利用,这为江苏省经济持续高速发展的同时,做好耕地、粮食发展战略决策提供科学依据。     

Integrating the environmental and economic consequences of converting to organic agriculture: evidence from a case study

In the current debate about the future of food quality, the merits of organic agriculture are frequently championed, but few studies have sought to integrate the changes in soil conditions, biodiversity and socio-economic welfare linked to the conversion from non-organic to organic production. This article aims to undertake this approach with respect to one case study. Its conclusions may not be representative for all organic conversions, but the findings are of relevance at a time of debate over changing patterns of subsidies and other incentives in agricultural policy. The study showed that there were demonstrable differences in overall environmental conditions in the comparison of organic and non-organic farming, with field evidence of increased species diversity, and an eventual improvement in the profitability of the organic farming regime. The broad conclusion is that there are definite environmental and economic advantages arising from organic agriculture that are not fully reflected in the present pattern of agricultural incentives. The study also showed that variations in farm management practice strongly influence the notion of on-farm and off-farm environmental consequences. The implications of these findings for the future of sustainable agriculture and for interdisciplinary science are also discussed.     

The challenges to urban agriculture in the Sydney basin and lower Blue Mountains region of Australia

The western edge of the Sydney basin in Australia has been one of the major sources of fruit and vegetables for the Sydney markets. A rapid expansion of urban development in this region has caused a significant reduction in the number of small farms and market gardens. Urban and peri-urban agriculture in the region also provides an important buffer between urban development and the neighbouring Greater Blue Mountains World Heritage Area. The decline in urban agriculture can be attributed to various causes including urban expansion and economies of scale. This paper presents an overview of a four-year project that explored options for supporting these vulnerable farming communities both in terms of the regulatory factors and economic and environmental sustainability. The role of agri-industries as landscape buffers to the neighbouring World Heritage Area was investigated in relation to resilience, communities of practice, and ecosystem services. The study developed tools, in conjunction with targeted representative landholders, that can assist in enhancing the economic and environmental resilience of these agri-industries. These tools included an integrated bio-system approach to waste using organic waste conversion, and the use of landscape function analysis to monitor across farms to help address erosion, loss of nutrients and inefficient water management.     

基于粮食安全的林业生物质能发展

以粮食为基础的生物能源已有危及粮食安全的倾向。发展林业生物质能有重要意义,中国有发展林业生物质能的巨大潜力,但当前也存在一些影响因素。为了实现能源安全和粮食安全的双赢,今后生物能源的发展应以非粮作物为主。应认识到发展林业生物质能重要性,加强技术研究,强化科技自主创新,加大产业扶持力度。     

桂西北石山区农业结构调整研究

根据桂西北石山区脆弱的生态环境以及丰富的生物资源特征,阐述了桂西北石山区在新阶段以发展高效生态农业为目的,调整农业结构布局的指导思想、原则、重点、方向以及实现农业结构调整的措施。     

粮食安全视角下地方政府征地行为博弈分析

粮食安全战略最终只是国家层次的目标,中央政府与地方政府发展战略目标的不一致导致粮食安全行动策略的差异,地方政府受经济利益驱动的影响,往往在征地行为中未顾及到粮食安全计划,本文从经济发展与粮食安全的角度构建地方政府间利益博弈模型,分析地方政府征地策略选择概率的限制因素,提出地方政府策略选择区间受机会成本条件约束和替代弹性约束的限制。对地方政府征地行为的分析,有助于促进土地政策的制定与实施,加强对地方政府征地行为的监管与约束,协调现阶段经济发展与农地保护和粮食安全的矛盾。