世界马铃薯生产发展基本态势及特点

马铃薯是世界第四大粮食作物,在世界范围内有着广泛的种植,关注世界马铃薯生产的发展情况对发展中国马铃薯产业有着重要的指导意义。从世界马铃薯生产角度出发,分析了世界及各区域马铃薯生产的状况和历史变迁,对世界马铃薯生产状况做出基本判断。研究结果表明：（1）世界马铃薯生产集中在“三区两带”,即高山地区、低地热带区、温带区三大主产区,23°—34°N、44°—58°N两个纬度带,占世界种植面积70%以上;（2）马铃薯在世界有着广泛的种植,但生产水平和农业生产地位差异较大;（3）世界马铃薯生产重心正在由西向东、由发达国家向发展中国家转移;（4）世界马铃薯生产格局正在发生重大变化。     

Mapping of Equipotential Zones for Cultivar Yield Pattern Evaluation

Using data from a triticale advanced line yield trial network, we attempt to define the zones, in Portugal, within which the joint regression can be established with enough accuracy and precision to be of practical value. The procedure comprises the following steps: adjustment of the joint regressions for the whole area; evaluation of the residuals in each trial; previous identification of geoclimatic zones; comparison of these zones with the residuals; adjustment of the regressions for the zones confirmed in the previous analysis, and testing the differences between the regressions for each zone. The experimental conditions allowed the differentiation of two main zones: “Nordeste Transmontano” and “Sul de Montejunto-Estrela”, however, another zone, included in the latter and designated “Alentejo Litoral e Algarve”, is suggested though further experimental data are needed for sound conclusions.     

Development Zones,Foreign Investment,and Global City Formation in Shanghai*

ABSTRACT The rapid economic ascent of China and the increasing integration of the world economy in the past two decades have made metropolises in China such as Shanghai and Beijing emerging global cities. Foreign investment is a central force underlying the emergence and transformation of the Chinese metropolises into global cities. This is especially true in Shanghai, which has experienced massive infusion of foreign investment. Varied forms of foreign investment or development zones have been created to promote foreign investment inflows, yet remain under‐studied. This paper analyzes structure, performance, and underlying factors of development zones in Shanghai, and discusses the implications for global city‐formation; it unfolds the variations among development zones, and illustrates the significant role of the state and local conditions. As the literature on global cities dwells primarily on the experiences of advanced economies, this paper further contributes to a better understanding of the dynamics of emerging global cities in the developing world.     

The Spatial Dimension of Trade‐ and FDI‐driven Productivity Growth in Chinese Provinces: A Global Cointegration Approach

This paper analyses the major determinants of long‐ and short‐run labour productivity evolution for Chinese provinces between 1978 and 2010. The role played by openness to trade and foreign direct investment (FDI) constitutes the main focus of this analysis. From a methodological perspective, our main contribution is the inclusion of spatial effects into a dynamic error correction modelling framework. The results show that, in addition to domestic factors such as investment intensity and infrastructure use, trade openness and inward FDI also exert a direct impact on labour productivity. Furthermore, the geographical environment has a strong indirect influence on productivity: The more a region is surrounded by high‐productive regions with good infrastructure and linkages to the world economy, the higher are its productivity level and growth rate. The magnitude of these impacts varies by spatial regime (coastal, interior provinces) and time period in focus. Especially in the recent past, trade and FDI activity appear to be increasingly important drivers of regional productivity evolution, both for coastal and interior regions. These findings have important policy implications: In order to fully exploit the benefits from such spillovers, coordinated industrial policies which foster regional complementarities and support the free movement of production factors across regional borders are crucial.     

Assessing the Potential for Zone‐Specific Management of Cereals in Low‐Rainfall South‐Eastern Australia: Combining On‐Farm Results and Simulation Analysis

In the low‐rainfall region of south‐eastern Australia, distinctive soil types reflecting the typical landscape of higher elevated dunes and swale zones at the bottom can be found within one field. Different soil characteristics cause consequently large variability in cropping productivity between soils and across seasons. To assess the possibilities for zone‐specific management, five farmer fields were zoned into a dune, mid‐slope and swale zone. For each site, zone yields were mapped over 2 years and soil properties were surveyed. This information was used to parameterize and validate the APSIM model for each zone. Field‐measured PAWC increased from the dune to the swale zone. On‐farm results and simulation analysis showed distinctive yield performance of the three designed zones. However, yield is not related to PAWC, it is rather a complex relationship between soil type, fertility and rainfall. While in high‐rainfall years, the swale zones yielded higher due to higher soil organic carbon content and less drainage losses, the dune zones performed better in the low‐rainfall years due to lower evaporation losses. This study emphasizes that in this specific environment where soil variation in texture and subsoil constraints strongly influence crop performance, mechanistic crop models and long‐term field observations are necessary for better understanding of zone‐specific performance, and simple linear relationships across years or sites are not useful.     

“Debrucing” the Link between Tax and Expenditure Limits and Special District Governments

We provide a direct test of the extent to which the stringency of a Tax and Expenditure Limit (TEL) influences the creation of special district governments by examining one of the strictest TELs in U.S. history, the Colorado Taxpayer's Bill of Rights (TABOR). Through analysis of panel data from 1993 to 2004 of general purpose and special district governments, we test the relationship between TABOR and the creation of special districts. The novelty of our research involves the use of successful and failed attempts to override TABOR to measure variation in TEL restrictiveness at the county and municipal geography. Our results indicate that counties and municipalities unable to override TABOR's restrictions and therefore bound by the TEL have no greater use of special district governments than local jurisdictions experiencing similar demand for services but not bound by TABOR. These results are robust to failed override attempts specific to tax revenue as well as debt proceeds. Furthermore, results are unaffected by the use of multiyear lagged measures of override attempts and the inclusion of county debrucing initiatives that passed or failed by a small margin—i.e., less than 60 percent of votes. Contrary to anecdotal evidence, our results find no relationship between tax and expenditure limits and the formation of special districts.     

Politics of Economic Adjustment: The Changing Nature of Women’s Work in Jharkand,India

This paper focuses on the ‘gendered’ politics of economic adjustment exemplified in India’s New Economic Policy (NEP) and interrogates NEP’s tacit appropriation of women’s labour (productive and reproductive) to maintain social reproduction during times of economic insecurity. Through a micro­study of an ‘Oraon’ village in the Jharkand region of Bihar, India, I explore the changing nature of women’s work and gender relations in response to the larger socio­economic transformation initiated by the NEP; and how in turn these changes are mediated through the interacting politics of the gendered ideology of the family and the household, class and ethnicity. Through the analysis of changing gender responsibilities within the household, I critique the ‘unitary model’ approach to household behaviour implicit in the NEP and argue for the need to move beyond it, to address the larger issues of gender equity and empowerment.     

Re‐Regulation in the Post‐WTO Period? A Case Study of Vietnam's Food Retailing Sector

Academic interest on domestic regulatory (and re‐regulatory) impacts of retail foreign direct investment remains surprisingly under‐researched, despite high‐profile campaigns, particularly in Southeast Asia, to rein in the expansion of retail transnational corporations. This paper focuses on the trends of re‐regulation of foreign retailers, particularly in the food sector, in Vietnam before and after the accession to the World Trade Organization (WTO) in 2007. The findings reveal a complex layering of regulation, some of it a holdover from the pre‐2007 period and some of it occurring since WTO accession, in the form of the controversial Economic Needs Test.     

Location choice of industrial land reduction in Metropolitan Area: Evidence from Shanghai in China

Under the background of supply side structural reform of the land market, this paper constructs a location choice behavior model of reduction from the perspective of rent maximization, explores how these factors affect the industrial land reduction location choice. We consider 100 industrial parcels in the suburbs of Shanghai as an example to analyze. It is found that the enterprises in development zones have greater advantages in economies of scale, labor productivity, pollution treatment, and tax payments than enterprises outside the development zone, so the low-efficiency enterprises outside the development zones are the preferred objects of reduction. The suburban areas have a stronger attraction than the outer suburbs in the process of location choice, and the closer the city center is, the more obvious the location advantages of enterprises in development zones. Under the control of the total amount of construction land, the land use structure should be constantly adjusted, inefficient enterprises outside the development zone should be preferred to the reduction object, and the government should actively guide enterprises to enter the development zones.     

Partial least squares regression and importance–satisfaction analyses of the strategic drivers of happiness: A quality of life survey in Seoul,Korea

Using survey data by the Seoul Metropolitan Government for 5 years (n = 228,103 individuals), this study analyzes the magnitudes of the impacts of major grouping variables on variations in the overall happiness through partial least squares regression analysis. This study then uses the importance–satisfaction analysis to explore how the between‐group variations can be reduced according to the current satisfaction as well as the ultimate importance of the five happiness components (health, finance, relationships with close relatives/friends, home life, and social life). The regression finds that self‐respect‐as‐a‐Seoul‐citizen, social class recognition, years (other than 2014), household income, and not being elderly have a positive difference in happiness. The importance of the social class recognition over the objective income suggests the validity of soft policies for increasing happiness as a subjective concept. The low happiness level in 2014 may reflect history effects or events that occurred in that year. The importance–satisfaction analysis presents customized strategies by group. Specifically, policies oriented to financial happiness are prioritized for groups with low values on self‐respect, class recognition, household income, and age while health‐ and home life‐related policies should be additionally arranged for the older population.     

Zeitliche und vertikale Nitratverteilung in der ungesättigten und gesättigten Bodenzone grundwassernaher Sandböden Nordwestdeutschlands

Periodic and Vertical Nitrate Distribution in Unsaturated and in Saturated Zone of Sandy Soils Close to Groundwater in North-West Germany
Investigations into the periodic and vertical distribution of nitrate were conducted in three geologically, pedologically and climatically comparable arable sandy soils lying close to the groundwater zone of the coastal moorlands of N.W. Germany. Periodical and vertical distribution of nitrate was observed in unsaturated and in saturated zones of the soil.
The investigation concerns podzol-brown earths. The depth of the water-unsaturated zone is 2 to 3 m. The crops in two locations consisted of maize and winter rye; in one location, of maize only. N-manuring consisted of mineral fertilizers and/or of organic liquid manure. At two locations the investigations were conducted over 3 years, at one location, over 18 months.
The results from the three locations indicate a corresponding clear variability of nitrate amounts in the soil depending on weather conditions, on the course of growth of the crops, and on the date, the rate and the type of manuring.
The dependence of nitrate content on the time span is most clearly expressed in the top soil. The peak values of NO₃ in the top soil appear in May, June and in the autumn months. Nitrate peaks in the top soil are continued in the subsequent ground levels with a time shift. Underneath the root zone, the nitrate peak values are transferred, largely without losses, by the seepage water through the capillary and groundwater zones close to the surface.
In the capillary and groundwater zones the nitrate peak values are characterized by time-dependent extension.
The time-span for transferring nitrate peak values from the top soil down to 4.00 m under the surface was determined to be approximately 6-8 months.     

Organising AIDS in the borderless world: A case study from the Indonesia–Malaysia–Singapore Growth Triangle*

Abstract: Tropes of borderlessness are pervasive both in discourses concerning the spread of HIV/AIDS and the Growth Triangle, a transnational economic zone that ideally binds together the Indonesian island of Batam, the Malaysian province of Johor and Singapore. This paper considers how the emergence of HIV as a problem in the Growth Triangle, and on Batam in particular, has been framed as a problem to be addressed in context of the nation‐state rather than as a transnational problem that demands cooperation across borders. In conjunction with this, it focuses on further attempts to create boundaries around HIV, through the identification of risk groups, the localisation of prostitutes and the distribution of condoms. The paper focuses particular attention on the relationship between Batam and Singapore, and how non‐governmental organisations and governments have dealt with HIV/AIDS issues in both places. Furthermore, it problematises these activities by paying ethnographic attention to other forms of cultural and economic logics that often are odds with prevention models. This raises important questions concerning, most specifically, the problems of HIV prevention and cross‐border cooperation, and, more generally, the regulation and formation of new kinds of borders in a ‘borderless world’.     

The complete chloroplast genome sequence of <Emphasis Type="Italic">Glycyrrhiza lepidota</Emphasis> (Nutt.) Pursh - An American wild licorice

The wild species are considered as primary and secondary genepools for the world’s most important food crops. Here, we sequenced the complete chloroplast (cp) genome sequence of an American wild licorice, Glycyrrhiza lepidota for the first time to investigate their phylogenetic relationship among inverted-repeat-lacking clade (IRLC) legumes. The total length of the chloroplast genome is 127,939 bp, with 34.2% overall GC content. The chloroplast genome harbors 110 known genes, including 76 protein-coding genes, four ribosomal RNA genes, and 30 tRNA genes. Similar to other closely related plastomes, rpl22 and rps16 are absent. A total of 464 cp microsatellites (cpSSRs) were analyzed in the G. lepidota. The majority of the SSRs in this cp genome are penta-nucleotides (61.6%). Locally collinear blocks (LCBs) identified between the Glycyrrhiza glabra and G. lepidota cp genomes were showed that they were well conserved with respect to gene organization and order. Moreover, the phylogenetic analysis indicates that G. lepidota is closely related to its confamilial counterparts than to the other taxa of the IRLC legumes.     

Estimating the Refugee Population from PUMS Data: Issues and Demographic Implications

Discussions of immigration, settlement and adjustment within the U.S. do not typically refer to immigrant status (i.e., refugee versus family preference), and instead refer to the foreign–born population as an aggregate. Distinguishing between refugees and other immigrant arrivals likely means differences with respect to their geographic distribution and embodied human capital owing to differences associated with the reasons for immigration (forced versus voluntary), period of arrival, and immigration policy. The lack of differentiation by group within the existing literature is typically due to a shortfall of detailed information relating to admission status within publicly released data files. Yet concrete knowledge of differences by admission category is important in understanding overall patterns of settlement and adjustment within the foreign–born population. This paper therefore explores potential differences with respect to settlement and endowed human capital between immigrants and refugees. Identification of the major sources of refugees within Immigration and Naturalization Service data files allows the refugee population to be identified within the 1990 Public Use Microdata Sample (PUMS), therefore increasing the range of variables and measures associated with the refugee population available to researchers, and points to the diversity of the refugee population.     

Changes in Cultivated Land Resources and Grain Potential in Mainland China between 1996 and 2007

Analysis of recent changes in the amount and nature of cultivated land and grain potential, and the impacts of these changes on grain security in mainland China provides vital information for revising and developing strategies regarding protection of cultivated land and national grain security. This study examined changes in the area of cultivated land and in grain potential in agro-ecological zones using the "change rate" method. Agro-ecological subzones were used as the basic units and agro-ecological zones as the research units. We then studied changes for all of mainland China using the "gravity centre model" and analyzed the structural change of cultivated lands in each agro-ecological zone to investigate the changes in detail. The results show that both cultivated land and grain potential in mainland China decreased from 1996 to 2007. The structural and quantitative changes in each zone have caused the shift of the gravity centres of cultivated land and grain potential in mainland China to the northeast. Unfortunately, it is unlikely that natural and economic resources can keep up with this change. Although a large gap remains between the grain potential and the actual grain yield, the rapid loss of grain potential and the direction of change pose great threats to grain security. To ensure comprehensive grain security in China, it is vital to rethink the regional patterns of grain production according to natural conditions without jeopardising cultivated land protection(quantitative and qualitative), and consider the direction of cultivated land use and reconstruction according to local natural conditions, water and soil resources, and the level of economic development, and then work steadily to improve the grain potential.     

Agglomeration and Competition among Chinese Cities: An Investigation of Taiwanese High‐Tech Foreign Direct Investment

The purpose of this study was to investigate how Taiwanese high‐tech firms' foreign direct investment (FDI) leads to agglomeration and competition among cities in China. By using social network analysis to analyze 1,111 subsidiaries affiliated with 270 multinational corporations (MNCs) during the years between 1988 and 2006 in 30 major Chinese cities, this study finds that: 1) agglomeration in Chinese cities falls into three primary categories: the hub cluster, the communication‐extended cluster, and the computer‐extended cluster. Among the aforementioned clusters, the hub cluster is the most critical in terms of firm location, and therefore is often a high‐priority investment site for Taiwanese high‐tech firms. 2) Chinese cities fall into four primary groups, or “blocks”: the core block, the coast block, the inland block, and the periphery block; these groups were determined by applying a structural equivalence analysis of which members of each type are in competition with one another. By linking the findings of the urban network characteristics to Chinese regional economic policies, this study provides guidance to aid executives in determining the optimal location for future FDI. Implications and suggestions for host country governments in terms of firms' investment strategies are also discussed.     

Critical Transport Infrastructure in Urban Areas: Impacts of Traffic Incidents Assessed Using Accessibility‐Based Network Vulnerability Analysis

Incidents (vehicle breakdowns, crashes, roadworks, lane blockages, severe weather, etc.) are believed responsible for about 50 percent of traffic congestion in Australia's major cities, which is a similar situation to that found in cities in many other parts of the developed world. Incident‐based congestion is particularly disruptive because of its random occurrence in space and time, which maximises the operational impacts of the congestion on social and economic activities. This paper discusses a method for assessing critical locations—congestion “hot spots”—in urban road networks, and the development and application of diagnostic tools that will allow urban road system managers to anticipate potential vulnerabilities to incident‐related congestion and take proactive action to avoid congestion rather than react to it. The expected outcomes are then reduced congestion, delays, and pollution; significantly improved performance from the existing urban road system; and reduced pressure to build more roads. The method involves modelling of travel demand, network topology, capacity and road geometry, the identification and assessment of impacts of traffic incidents at specific locations in a road network, and the use of accessibility impact analysis to assess system‐wide effects. Accessibility impact analysis is undertaken using an accessibility framework, which can account for time of day, transport mode and destination choices by individuals, and level of traffic congestion among other factors. A case‐study application to a specific (potential) incident in a real‐world network indicates that the proposed method is feasible and demonstrates its power in identifying not just total impacts but the distribution of those impacts across a region or community. While current approaches to urban road network planning and management tend to be reactive—finding cures for problems as they arise or addressing locations of recurrent congestion or bad incident record—the vulnerability analysis method described in the paper should lend itself to a proactive approach that can anticipate structural weaknesses and vulnerabilities and help to avoid or at least temper potential adverse effects, rather than to react to them afterwards.     

Fertilizer Best Management Practices: A Perspective from the Dryland West Asia–North Africa Region

Chemical fertilizer use has contributed significantly to increased global food output in the past half century, especially in climatically favourable regions of the world. However, in drier agro‐ecological zones, such as in West Asia and North Africa (WANA) with a Mediterranean‐type climate, fertilizer use has been low but has increased rapidly in the past few decades. Chemical fertilizer use is now widely adopted in rainfed and irrigated agriculture. As elsewhere, fertilizer use is underpinned by concerns about biological and economic efficiency. Fertilizer use efficiency is central to the current concept of fertilizer best management practices (FBMP), which embraces right source, right place, right timing and right application method. In this brief review, we highlight such FBMP concepts as related to agriculture of the WANA region, with emphasis on the key nutrients for crop production. Rainfall has a dominant influence on dryland crop yields. Nitrogen (N) use efficiency increases with increasing rainfall and is influenced by crop rotation. Under rainfed conditions, modest N losses by volatilization can occur. Leaching losses are usually minimal. Phosphorus use (P) efficiency is higher with band application than with broadcasting. Balanced fertilization, especially involving potassium (K) and micronutrients, is fundamental to efficient nutrient use. Fertilizer efficiency is also influenced by soil test values and agronomic factors that influence crop yields, e.g. sowing date and varietal differences. Rational fertilizer application rates are guided by calibration–response trials. Effective fertilizer use in the region is also dictated by external factors such as government policies and a functioning extension service. In contrast to other regions of the world, environmental impacts from the overuse of fertilizers are relatively minor, while developments in fertilizer formulations that promote efficiency have yet to have impact. Despite the relatively low fertilizer use intensity in dryland areas such as the WANA region, the FBMP comprehensive approach is a logical framework within which to achieve the most efficient management and use of fertilizer in the region’s agriculture.     

Impact on China''s Construction Industry after Accession of China to WTO and Countermeasures

China's construction industry is confronting with the impacts and challenges with the China's entry into the WTO. With the further opening to the outside world, the competition of China's construction industry becomes more and more intensive. Under such circumstance, the only way to adapt to the post-WTO environment for China's construction industry is to promote such works as regulation integrity, industrial structure adjustment and enterprise innovation. In order to promote and speed up the development of China's construction industry, it is realistic to analyze both the advantages and disadvantages with the accession of China to WTO and take corresponding countermeasures.     

Local geographies of globalisation: rural agglomeration in the Chinese countryside

China’s rural enterprises were responsible for 48 per cent of the $US 151 billion in exports and absorbed nearly 20 per cent of total foreign direct investment in 1996. Clearly, the significant and increasing role of rural enterprises in China’s integration with the world economy demands attention. The penetration of global capital into the rural enterprise sector and the desire of such enterprises to benefit from expansion into international markets have important implications at the local level. The impact of international, domestic and local forces on institutional and structural reforms is reflected in particular spatial outcomes in rapidly developing non‐urban regions. Local authorities have responded to external forces in ways which do not conform to the conventional expectations. Evidence from the lower Yangtze (Yangzi) delta reveals how the supposedly universalising pressures of globalisation have been mediated and adapted at the local level, particularly in terms of enterprise location and the proliferation of special zones. Expanding on the desakota hypothesis, the notion of rural agglomeration is introduced to capture the paradox of spatial economic transformation as it was linked to local circumstances, and localised responses to external pressures of globalisation.