沪郊柑桔产业发展现状与展望

柑桔是世界第一大水果，中国是世界上许多柑桔种类的原产地，而上海的柑桔种植面积在全国几乎是排不上名次，种植面积只能算是个“小弟弟”。但随着我国农业产业结构战略性调整步伐的深入推进，消费者对柑桔的需求量的增加，如今沪郊柑桔种植同全国一样，在面积趋于稳定的同时，又有了长足的发展，品种和品质结构调整发展迅速，产业链条不断延伸，产业整体竞争力显著提升。来自上海市农业部门的专家学者对沪郊柑桔业的发展现状进行了分析和展望，认为应在提高品质的基础上限量发展。     

综合防治柑桔黄龙病

柑桔黄龙病的蔓延扩展，对柑桔产业的发展造成严重的威胁。文章介绍综合防治柑桔黄龙病的经验。     

栽种柠檬好处多

柠檬又称宜母果，为荟香科柑桔属。原产马米西亚，目前地中沿岸，东南亚和美洲等地都有分布，我国台湾、广东、福建等地有栽培，浙江也有零星种植。美国和意大利是柠檬的著名产地，法国则是世界上食用柠檬最多的国家。     

砂糖桔破题

又到柑桔成熟时。 当我们品尝着美昧的岭南佳果砂糖桔时，很多人可能还记得，去年却是广东柑桔业命运多舛之年。由于蛆柑流言、全国柑桔普遍丰收、金融危机等原因导致国内外市场萎缩，广东柑桔销售一度呈现疲态。记者在今年春节前对砂糖桔“卖难”问题做了深度的报道，直指柑桔产品同质化导致行业无序发展，产业处于散户时代等发展困境，并提出政府应完善服务水平，加强区域品牌推广等建设性建议.     

因地制宜,发展我国柑桔生产

柑桔是热带、亚热带常绿果树,性喜温暖湿润的生态环境。我国适栽柑桔的地域辽阔,占全国面积27.7％的热带、亚热带都有分布,面达十八个省、市、自治区,主要集中在北纬33°以南的四川、广东、广西、浙江、湖南、福建、江西、台湾等省(区)。     

柑桔生产经营规模的研究

通过模型解析得出在浙江衢县目前生产条件下,影响柑桔生产经营规模的主要因素为资金投入和桔园面积。并分别求得在兼营与专营条件下1—3个劳动力农户的最佳经营规模。     

锈潜净乳油防治柑桔锈壁虱和潜叶蛾的药效试验

柑桔锈壁虱和柑桔潜叶蛾都是柑桔生产上的主要害虫，本文介绍了使用锈潜净乳油防治柑桔锈壁虱和潜叶蛾的试验情况。     

广东省柑桔专业镇——南盛镇

南盛镇位于广东云浮市云安县南部，云雾山北麓，是云浮市柑桔的发源地和主产区。目前，全镇90％以上的农户种植柑桔，总面积达10．3万亩，人均种植面积3亩多，已成为广东省镇级最大的柑桔主产区。     

抓住优势 发展规模——蓬安县发展柑桔生产的调查

蓬安系川中盆地丘陵县,发展柑桔已有1700多年的历史。近十几年来,该县认真实施以良种为依托,以基地建设为轴心,以规模发展为重点的柑桔发展战略,使柑桔生产获得了突破性的发展,柑桔产量和质量均名列全省前茅。年总产值在全县8个主要农副产品中,已由70年代的第五位上升到第一位,成为农村经济的一大骨干产业,柑桔远销苏联、香港等国家和地区,近十     

综合防治柑桔黄龙病

柑桔黄龙病的蔓延扩展,对柑桔产业的发展造成严重的威胁。文章介绍综合防治柑桔黄龙病的经验。     

夏橙在赣州大面积推广可行性分析

[目的]夏橙比赣州地区其它的橙子品种具有一些比较优势,晚熟特性可以与其他品种错开季节销售,品质也较好,当前在赣州地区有小面积种植,评估夏橙是否在赣州地区大面积种植,对防范大规模种植带来的风险,具有重要意义。[方法]文章从夏橙要求的种植条件出发,通过赣州地区17个气象站40年资料与各个气象站的海拔建立了大于等于10℃积温与海拔关系模型,利用ARCGIS软件和赣州地区1:25万地理信息数据,分析赣州地区各地理信息网格点上热量条件,进而确定赣州区域内满足夏橙种植的热量条件,还分析了各站的极端气温、水分、日照和土壤情况,是否有利于夏橙种植。[结果]从土地类型、积温、日照、水分条件和土壤条件来看,赣州大部分适宜种植。从极端最低气温和历史性积温来看,赣州不适宜大面积种植,只有个别小气候区域,极端低温达不到零下3℃的区域才能种植。[结论]夏橙不适宜在赣州地区大面积推广,只适合在个别小气候环境适宜的区域种植。有待于未来培育耐低温的品种,才能大面积种植。     

气候因子对花生-脐橙两大经济圈的负面影响

花生是中国科学院红壤生态实验站所在地域附近农业的特产和经济收入的命脉;中国科学院三峡工程秭归生态实验站地域的脐橙,是库区农业的特产和经济收入的命脉,也是库区高山峡谷绿化造林防治水土流失的好办法。气候因子对花生—脐橙两大经济作物的负面影响极大;根据两大经济圈的现实气象资料和实地观察,探索了生态网络气象数据的处理。     

ECONOMIC EFFECTIVENESS OF BRAND ADVERTISING PROGRAMMES FOR U.S. ORANGE JUICE IN THE EUROPEAN MARKET: AN ERROR COMPONENT ANALYSIS

An econometric model is used to measure the impact of the Three-Party Programme on European demand for U.S. orange juice. The results show that the programme has helped expand the demand for orange juice in European countries and, from the viewpoint of the U.S. citrus industry, is an economically preferred way of generating additional exports compared with using price reductions to achieve additional sales.     

关于“双置换”模式“普适性”的思考

成都温江区最早开始实施的"双置换",现已成为各地农地制度改革创新中学习的典范,尤其受到地方政府的青睐。但在某些地区,"双置换"制度却受到了当地农民的抵触,结果差强人意。为什么"橘生淮南则为橘,生于淮北则为枳","双置换"能否具有普适性?文章将在深入分析成都"双置换"模式的基础上,结合江苏南通地区的实施情况,将两地进行对比,从而对这个问题进行探讨,并提出建议。     

A MODEL OF SUPPLY RESPONSE IN THE AUSTRALIAN ORANGE GROWING INDUSTRY*

A model of the Australian orange growing industry to explain changes in plantings, removals, the number and age composition of trees and orange production is developed and estimated. Most of the variation in plantings is explained by the expected profitability of growing oranges, the current stocks of bearing and nonbearing trees, and removals of trees last year. Estimates of the elasticities of response of plantings and production to price changes are low and there are long time lags. An illustrative application of the model projects future developments in the industry for alternative assumptions about the profitability of growing oranges.     

试论三峡柑桔带的系列开发

柑桔开发是长江三峡地区的大农业优势,本区气候优越,土壤适宜,品种适栽,生产已经初具规模,土地资源潜力较大,市场前景广阔。三峡柑桔带的系列开发,可以带动一系列相关行业的发展,对于本区脱贫致富、移民开发、经济发展产生深远影响。随着三峡工程的上马,要在本世纪末建成我国内销、外贸和加工相结合的有特色的长江三峡柑桔带。     

中国水果收购价格波动性研究——以苹果、香蕉和橙子为例

价格是市场的信号,水果收购价格对果农的生产决策和市场供给具有重要的指示作用。本研究利用Census X12法、H-P滤波法和变异系数法对2002～2010年中国苹果、香焦和橙子的季度收购价格的波动特征进行分析。研究结果显示:三类水果收购价格具有上升的长期趋势,季节性波动特征表现非常明显,而且较易受到外部因素的冲击;三类水果收购价格波动周期都具有不可重复性和非对称性;同时发现,苹果和香焦的收购价格有5个波动周期,平均波动周期为7.2个季度;而橙子的收购价格有3个波动周期,平均波动周期为12个季度。     

Design Factors Influencing Willingness‐to‐Pay Estimates in the Becker‐DeGroot‐Marschak (BDM) Mechanism and the Non‐hypothetical Choice Experiment: A Case of Biofortified Maize in Zambia

Two of the experimental methods used to estimate willingness‐to‐pay (WTP) for a non‐market good, the Becker‐DeGroot‐Marschak (BDM) mechanism and the non‐hypothetical choice experiment (nHCE) often lead to significantly different WTP estimates, complicating the choice between the methods. In Zambia the same group of researchers used both techniques to evaluate WTP for orange maize, which provides more vitamin A than other varieties. This provided an opportunity to analyse the sources of the difference. In the BDM experiment, one group of respondents was provided with more training opportunities than the other, and made higher bids. Accounting for lexicographic behaviour in the nHCE reduced the estimated WTP. These two design factors together resulted in a decrease in the WTP difference for orange maize (1,279–632 ZMK) although the difference remains statistically significant. More training was also shown to eliminate the effects of different orders in which maize varieties were presented.     

TIME VARYING DEMAND FOR ORANGES IN THE EEC

Orange consumption is of special interest to the EEC since three new citrus-producing countries are scheduled to enter into the community. Demand for sweet oranges has changed over time as EEC trade policies change. Time varying parameters procedures are used to evaluate the dynamics of orange demand in the community of nine. The demand estimates are then used to make consumption projections through 1990. The merits of TVP models are contrasted to those of OLS.     

Commodity futures markets: a survey

This review article describes the main contributions in the literature on commodity futures markets. It is argued that modern studies have focused primarily on technical questions, with insufficient economic content. More research needs to be directed towards understanding fundamental economic issues such as why so few farmers hedge, the impacts of government farm programs on commodity futures, and the market impacts of commodity pools. The literature has failed to explain the prevalence of inverted markets in grains and oilseeds, and there is unexplainable price volatility in markets such as hogs and orange juice.