共查询到10条相似文献,搜索用时 62 毫秒
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转基因食品现状及贸易措施分析 总被引:1,自引:0,他引:1
自1994年首个转基因植物产品番茄商业化以来,转基因技术、研发、产业等均取得了飞速进展,转基因产品已进入人们的生活,为防范转基因生物对环境及人类健康的风险,应对不断出现的贸易壁垒,作者整理分析了自1994年以来转基因食品国际研发、获批、种植推广、安全性评价等状况,以及中国转基因食品获批、消费、管理状况,提出了在目前转基因食品安全争论和贸易壁垒形势下的对策和建议。 相似文献
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福寿螺在中国的入侵历史、扩散规律和危害的调查分析 总被引:6,自引:1,他引:6
福寿螺是全球性的入侵水生动物,在许多国家和地区造成了严重的危害。80年代初传入我国后,迅速扩散至我国南方各省,成为危害水稻及其他水生植物的恶性入侵水生动物。本文采用文献调研的方式,调查了我国福寿螺引种和扩散的历史过程、入侵危害区域和防治现状等内容。调查分析结果显示,引种和水产养殖活动是加速福寿螺在各地入侵和扩散的主要原因。引种养殖期间,对福寿螺引种养殖缺乏有效的科学管理,导致福寿螺在我国南方大部分地区对农作物生产造成危害,对当地生态系统也产生严重影响。显示出我国对外来物种引入及管理的薄弱,以及加强对外来物种监测预警的重要性和紧迫性。 相似文献
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当前种业的竞争日趋激烈,种业全球化趋势正在逐步深化。中国不仅是世界上重要的种子生产国,同时又是极具潜力的种业市场。据估计2004—2005销售年度中国市场种子销售总值超过25亿美元,而中国商业种子市场价值约为30亿美元,居世界第2位,并且随着种子商品化程度的提高,市场增长潜力很大,未来的10~20年可能达到100亿美元以上, 相似文献
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This paper examines the impact of China's export trade on smog pollution. Based on provincial panel data from 2006 to 2016 in China, we use spatial econometric methods to empirically investigate the smog pollution effects of China's export trade from two dimensions, export scale and export structure. It has been found that smog pollution in various regions of China has obvious spatial correlation; China's export trade has a significant positive impact on smog pollution, whether in terms of export scale or export structure. After establishing different forms of spatial weight matrices and considering alternative indicators of smog pollution, the results of this paper are still robust. 相似文献
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中国种子企业在市场竞争中稳步发展 总被引:1,自引:2,他引:1
当前中国种业市场呈竞争过度而又无序状态.中国种子企业要稳步发展.就要在管理水平、人才及品种上下功夫,以规模、品牌和价格取胜.实现种子市场的重新整合. 相似文献
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玉米根萤叶甲(Diabrotica virgfera virgifera Leconte)是一种原产北美洲南部和中美洲北部并于1992年以来在欧洲快速传播扩散的危险性玉米害虫.该虫对我国玉米生产构成严重威胁.为了防范其入侵,本文在概述其生物学和传播蔓延趋势的基础上,利用基于生态位概念的GARP软件对该虫在我国的潜在适生区域进行了预测.研究显示适生区广布于黑龙江、吉林、辽宁、内蒙古、新疆、河北、北京、天津、山东、山西、陕西、宁夏、甘肃、江苏、安徽、河南、湖北、四川、云南和西藏等省区,其中最适生区主要位于东北平原的南部、华北平原的南部、渭河平原及其南北附近地区.据此结果,对其远距离传入中国的可能途径做了分析,对高危地区进行了分析判断,最终提出了检疫与防范建议. 相似文献
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Jean‐Franois Rousseau 《Asia Pacific viewpoint》2020,61(1):134-146
Hundreds of hydropower dam projects, of all sizes, have been initiated in Yunnan Province, China, since the late 1990s. This paper frames hydropower‐driven resource reallocations as resource grabs that combine aspects of land, water and green‐grabbing, investigating how two dams built along the Red River have impacted local communities and how corporate and governmental stakeholders have viewed local livelihood changes and considered compensation mechanisms. This research documents how hydropower expansion triggers changes in both land and water availability, in turn depriving riverside communities of a wide range of intersecting livelihood benefits. Villagers were compensated for some losses, but in ways that failed to address how impacts accumulated over time and how hydrologic changes would impact overall livelihood activities. Financial compensation and specific environmental and modernisation agendas legitimised resource reallocations together with the provincial, national and global development campaigns driving them. Considering how different actors experience, frame and address the impacts of hydropower development through a resource‐grabbing lens elucidates the compartmentalised approaches of distant hydropower actors as well as scholars. This study answers recent calls to mobilise the scholarship on resource‐grabbing in the service of shedding light on the socio‐political projects driving resource reallocations and their livelihood impacts. 相似文献