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A sustainable metasurface for smart food labelling 用于智能食品标签的可持续元表面
Q1 Agricultural and Biological Sciences Pub Date : 2024-04-09 DOI: 10.1038/s43016-024-00964-5
Jie Liang, Jia Zhu
A newly developed metasurface that is eco-friendly, non-toxic and water soluble facilitates the use of sensor-enabled food packaging.
新开发的超表面具有环保、无毒和水溶性等特点,有助于使用传感器食品包装。
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引用次数: 0
A water-soluble label for food products prevents packaging waste and counterfeiting 用于食品的水溶性标签可防止包装浪费和伪造
Q1 Agricultural and Biological Sciences Pub Date : 2024-04-04 DOI: 10.1038/s43016-024-00957-4
Joohoon Kim, Hongyoon Kim, Hyunjung Kang, Wonjoong Kim, Yi Chen, Jonghyun Choi, Heon Lee, Junsuk Rho
Sustainability, humidity sensing and product origin are important features of food packaging. While waste generated from labelling and packaging causes environmental destruction, humidity can result in food spoilage during delivery and counterfeit-prone labelling undermines consumer trust. Here we introduce a food label based on a water-soluble nanocomposite ink with a high refractive index that addresses these issues. By patterning the nanocomposite ink using nanoimprint lithography, the resultant metasurface shows bright and vivid structural colours. This method makes it possible to quickly and inexpensively create patterns on large surfaces. A QR code is also developed that can provide up-to-date information on food products. Microprinting hidden in the QR code protects against counterfeiting, cannot be physically detached or replicated and may be used as a humidity indicator. Our proposed food label can reduce waste while ensuring customers receive accurate product information. Food packaging is an important environmental concern and susceptible to counterfeit-prone labelling. This study presents a newly developed water-soluble food label using nanocomposite ink that addresses these issues.
可持续性、湿度感应和产品来源是食品包装的重要特征。标签和包装产生的废弃物会破坏环境,湿度会导致食品在运送过程中变质,而容易伪造的标签则会损害消费者的信任。在此,我们介绍一种基于高折射率水溶性纳米复合油墨的食品标签,以解决这些问题。通过使用纳米压印光刻技术对纳米复合油墨进行图案化处理,最终得到的元表面呈现出鲜艳明亮的结构色彩。这种方法可以快速、低成本地在大型表面上制作图案。此外,还开发了一种 QR 码,可以提供食品的最新信息。隐藏在 QR 码中的微打印技术可防止伪造,无法物理剥离或复制,并可用作湿度指示器。我们提出的食品标签既能减少浪费,又能确保客户获得准确的产品信息。
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引用次数: 0
Agricultural management practices in China enhance nitrogen sustainability and benefit human health 中国的农业管理做法提高了氮的可持续性并有益于人类健康
Q1 Agricultural and Biological Sciences Pub Date : 2024-04-02 DOI: 10.1038/s43016-024-00953-8
Jiakun Duan, Hongbin Liu, Xiuming Zhang, Chenchen Ren, Chen Wang, Luxi Cheng, Jianming Xu, Baojing Gu
The potential of enhanced agricultural management practices to drive sustainability is rarely quantified at grassroots level. Here we analyse nitrogen use and loss in Chinese cropland, drawing from data collected in 2,238,550 sites in two national agricultural pollution source censuses from 2007 to 2017. We find an upswing of 10% in crop yields and an 8% reduction in nitrogen pollution during this period, owing to the promotion and adoption of various management practices (including the combination of organic and chemical fertilizers, straw recycling and deep placement of fertilizer). These practices have collectively contributed to an 18% increase in nitrogen use efficiency in the country. By fully embracing them, we project that annual cropland pollution could be further reduced by up to 1.4 Mt of nitrogen without compromising crop yields. Environmental and human health benefits are projected to consistently outweigh implementation costs in the future, with total benefits reaching US$15 billion. The exact quantification of environmental and human health gains achieved through sustainable nitrogen management is often impaired by real-world data availability. Drawing on an extensive database in China, this study estimates the costs and benefits of combining organic and chemical fertilizers, straw recycling and deep placement of fertilizer.
加强农业管理实践推动可持续发展的潜力很少在基层得到量化。在此,我们利用 2007 年至 2017 年两次全国农业污染源普查中收集的 238,550 个地点的数据,分析了中国耕地的氮素使用和流失情况。我们发现,在此期间,由于推广和采用了各种管理方法(包括有机肥和化肥结合、秸秆回收利用和化肥深施),作物产量提高了 10%,氮污染减少了 8%。这些做法共同促使该国的氮利用效率提高了 18%。通过全面采用这些方法,我们预计每年可进一步减少 140 万吨氮的耕地污染,而不会影响作物产量。预计未来环境和人类健康效益将持续超过实施成本,总效益将达到 150 亿美元。
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引用次数: 0
Personalized nutrition as the catalyst for building food-resilient cities 个性化营养是建设具有粮食复原力的城市的催化剂。
Q1 Agricultural and Biological Sciences Pub Date : 2024-04-01 DOI: 10.1038/s43016-024-00959-2
Anna Ziolkovska, Christian Sina
Data-driven personalized nutrition (PN) can address the complexities of food systems in megacities, aiming to enhance food resilience. By integrating individual preferences, health data and environmental factors, PN can optimize food supply chains, promote healthier dietary choices and reduce food waste. Collaborative efforts among stakeholders are essential to implement PN effectively.
数据驱动的个性化营养(PN)可以解决特大城市粮食系统的复杂性,从而提高粮食的抗灾能力。通过整合个人偏好、健康数据和环境因素,个性化营养可以优化食品供应链,促进更健康的饮食选择,并减少食品浪费。利益相关者之间的合作对于有效实施 PN 至关重要。
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引用次数: 0
Over 80% of the European Union’s Common Agricultural Policy supports emissions-intensive animal products 欧盟 80% 以上的共同农业政策支持排放密集型动物产品
Q1 Agricultural and Biological Sciences Pub Date : 2024-04-01 DOI: 10.1038/s43016-024-00949-4
Anniek J. Kortleve, José M. Mogollón, Helen Harwatt, Paul Behrens
The European Union’s Common Agricultural Policy strongly influences the European Union’s food system via agricultural subsidies. Linking global physical input–output datasets with public subsidy data reveals that current allocation favours animal-based foods, which uses 82% of the European Union’s agricultural subsidies (38% directly and 44% for animal feed). Subsidy intensity (€ kg−1) for animal-based foods approximately doubles after feed inclusion. The same animal-based foods are associated with 84% of embodied greenhouse gas emissions of EU food production while supplying 35% of EU calories and 65% of proteins. The transition towards plant-based diets requires supportive market and policy instruments. This study investigates how and the extent to which public funds support animal agriculture by tracking subsidy flows related to the European Union’s Common Agricultural Policy across global food supply chains.
欧盟的共同农业政策通过农业补贴对欧盟的粮食系统产生了强烈影响。将全球实物投入产出数据集与公共补贴数据联系起来可以发现,目前的补贴分配偏向于动物性食品,使用了欧盟 82% 的农业补贴(38% 直接补贴,44% 用于动物饲料)。纳入饲料后,动物性食品的补贴强度(€ kg-1)大约翻了一番。同样的动物性食品占欧盟食品生产温室气体排放的 84%,但却提供了欧盟 35% 的热量和 65% 的蛋白质。
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引用次数: 0
Phosphorus applications adjusted to optimal crop yields can help sustain global phosphorus reserves 根据最佳作物产量调整磷的施用量有助于维持全球磷储备。
Q1 Agricultural and Biological Sciences Pub Date : 2024-03-25 DOI: 10.1038/s43016-024-00952-9
R. W. McDowell, P. Pletnyakov, P. M. Haygarth
With the longevity of phosphorus reserves uncertain, distributing phosphorus to meet food production needs is a global challenge. Here we match plant-available soil Olsen phosphorus concentrations to thresholds for optimal productivity of improved grassland and 28 of the world’s most widely grown and valuable crops. We find more land (73%) below optimal production thresholds than above. We calculate that an initial capital application of 56,954 kt could boost soil Olsen phosphorus to their threshold concentrations and that 28,067 kt yr−1 (17,500 kt yr−1 to cropland) could maintain these thresholds. Without additional reserves becoming available, it would take 454 years at the current rate of application (20,500 kt yr−1) to exhaust estimated reserves (2020 value), compared with 531 years at our estimated maintenance rate and 469 years if phosphorus deficits were alleviated. More judicious use of phosphorus fertilizers to account for soil Olsen phosphorus can help achieve optimal production without accelerating the depletion of phosphorus reserves. Ongoing depletion rates of phosphorus reserves might pose a challenge to future food security. This Analysis estimates the effects of matching plant-available soil Olsen P concentrations with thresholds for optimal yields of grassland and 28 crops on the longevity of global P reserves.
由于磷储备的寿命不确定,如何分配磷以满足粮食生产需求是一项全球性挑战。在这里,我们将植物可利用的土壤奥尔森磷浓度与改良草地和 28 种世界上种植最广泛、最有价值的作物的最佳生产力阈值相匹配。我们发现,低于最佳生产临界值的土地(73%)多于高于临界值的土地。根据我们的计算,56,954 千吨的初始资本应用可将土壤中的奥尔森磷提高到阈值浓度,28,067 千吨/年-1(耕地为 17,500 千吨/年-1)可维持这些阈值。在没有额外储备的情况下,按照目前的施用量(20500 千吨/年-1),需要 454 年才能耗尽预计的储备量(2020 年值),而按照我们预计的维持量,则需要 531 年,如果磷短缺得到缓解,则需要 469 年。更明智地使用磷肥来补充土壤中的奥尔森磷,有助于实现最佳生产,同时不会加速磷储备的耗竭。
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引用次数: 0
Agri-environmental policies from 1960 to 2022 1960 年至 2022 年的农业环境政策
Q1 Agricultural and Biological Sciences Pub Date : 2024-03-22 DOI: 10.1038/s43016-024-00945-8
David Wuepper, Ilsabe Wiebecke, Lara Meier, Sarah Vogelsanger, Selina Bramato, Andrea Fürholz, Robert Finger
For both research and practice, it is paramount to understand what, where and when agri-environmental policies have been put in place. Here we present a database of 6,124 agri-environmental policies implemented between 1960 and 2022 in about 200 countries. The database comprises a wide range of policy types (including regulations and payment schemes) and goals (such as biodiversity conservation, safer pesticide use and reducing nutrient pollution). We illustrate the application of the database by exploring the association between economic development and agri-environmental policies and between the soil-related, agri-environmental policies of countries and their border discontinuities in cropland erosion. A strong, positive link between economic development and implemented agri-environmental policies is revealed, and it is found that 43% of all global border discontinuities in soil erosion between countries can be explained by differences in their policies. A lack of systematized information on existing agri-environmental policies poses challenges for research and practice. A new database with more than 6,000 agri-environmental policies implemented over the past six decades around the world helps fill the gap. This information enables the extraction of valuable insights for policymakers, academics and businesses.
对于研究和实践而言,了解农业环境政策的内容、实施地点和时间至关重要。在此,我们提供了一个数据库,其中包含 1960 年至 2022 年间在约 200 个国家实施的 6124 项农业环境政策。该数据库包含多种政策类型(包括法规和支付计划)和目标(如保护生物多样性、更安全地使用农药和减少养分污染)。我们通过探讨经济发展与农业环境政策之间的关联,以及各国与土壤相关的农业环境政策与其耕地侵蚀边界不连续性之间的关联,来说明该数据库的应用。结果表明,经济发展与已实施的农业环境政策之间存在密切的正向联系,而且在全球各国土壤侵蚀的边界不连续性中,有 43% 可以用政策差异来解释。
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引用次数: 0
Contribution of fragmented croplands 破碎耕地的贡献
Q1 Agricultural and Biological Sciences Pub Date : 2024-03-21 DOI: 10.1038/s43016-024-00937-8
Xiaolong Wang
Cropland fragmentation poses a significant threat to agricultural sustainability in China. Rational crop layout is required for different ecological regions to manage the fragmented croplands.
耕地破碎化对中国农业的可持续发展构成重大威胁。不同生态区域需要合理的作物布局,以管理破碎化的耕地。
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引用次数: 0
Managing fragmented croplands for environmental and economic benefits in China 在中国管理破碎的耕地,实现环境和经济效益
Q1 Agricultural and Biological Sciences Pub Date : 2024-03-21 DOI: 10.1038/s43016-024-00938-7
Ouping Deng, Jiangyou Ran, Shuai Huang, Jiakun Duan, Stefan Reis, Jiabao Zhang, Yong-Guan Zhu, Jianming Xu, Baojing Gu
Cropland fragmentation contributes to low productivity and high abandonment risk. Using spatial statistics on a detailed land use map, we show that 10% of Chinese croplands have no potential to be consolidated for large-scale farming (>10 ha) owing to spatial constraints. These fragmented croplands contribute only 8% of total crop production while using 15% of nitrogen fertilizers, leading to 12% of fertilizer loss in China. Optimizing the cropping structure of fragmented croplands to meet animal food demand in China can increase animal food supply by 19%, equivalent to increasing cropland proportionally. This crop-switching approach would lead to a 10% and 101% reduction in nitrogen and greenhouse gas emissions, respectively, resulting in a net benefit of US$ 7 billion yr−1. If these fragmented croplands were relocated to generate large-scale farming units, livestock, vegetable and fruit production would be increased by 8%, 3% and 14%, respectively, and reactive nitrogen and greenhouse gas emissions would be reduced by 16% and 5%, respectively, resulting in a net benefit of US$ 44 billion yr−1. Both solutions could be used to achieve synergies between food security, economic benefits and environmental protection through increased agricultural productivity, without expanding the overall cropland area. Using spatial statistics on a detailed land use map, the study highlights the impact of cropland fragmentation in China. Optimizing cropping structures to meet animal food demand or relocating fragmented croplands for large-scale farming can release the potential of the fragmented croplands for increased agricultural productivity and environmental protection.
耕地破碎化导致低生产率和高撂荒风险。通过对土地利用详图的空间统计,我们发现,由于空间限制,中国有 10% 的耕地没有被整合为大规模耕作(10 公顷)的潜力。这些破碎的耕地仅占农作物总产量的 8%,却使用了 15% 的氮肥,导致中国 12% 的化肥流失。为满足中国的动物食品需求,优化破碎耕地的种植结构可使动物食品供应量增加 19%,相当于按比例增加耕地面积。这种作物转换方式将使氮排放量和温室气体排放量分别减少 10%和 101%,每年可带来 70 亿美元的净效益。如果将这些零散的耕地迁移到其他地方,形成大规模的耕作单元,牲畜、蔬菜和水果产量将分别增加 8%、3% 和 14%,活性氮和温室气体排放量将分别减少 16% 和 5%,净效益为每年 440 亿美元。这两种解决方案都可以在不扩大总耕地面积的情况下,通过提高农业生产率来实现粮食安全、经济效益和环境保护之间的协同增效。
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引用次数: 0
On the value of food systems research 关于粮食系统研究的价值。
Q1 Agricultural and Biological Sciences Pub Date : 2024-03-20 DOI: 10.1038/s43016-024-00960-9
Every study has limitations; the question is whether it moves the field forward and what this entails for each community.
每项研究都有局限性;问题在于它是否推动了该领域的发展,以及这对每个社区意味着什么。
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引用次数: 0
期刊
Nature food
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