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Resilient livelihoods in Africa’s pastoral–agropastoral transition zones will increasingly depend on heat stress adaptation and systemic change 非洲畜牧业-农牧业过渡区的弹性生计将越来越依赖于热应力适应和系统性变革
IF 23.6 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-25 DOI: 10.1038/s43016-024-01079-7
Philip Thornton, Mario Herrero, Gerald Nelson, Dianne Mayberry
Pastoral–agropastoral transition zones across the African continent are projected to face crop production difficulties due to climate change. A greater emphasis on livestock production may be an appropriate response in some places. Here we explore how heat stress may impact livestock productivity and human work capacity. While adaptations can alleviate some of the challenges related to heat stress, data-driven, systemic changes and multi-stakeholder participation are needed to accommodate the complex socio-economic factors involved in shaping a vision for pastoral and agropastoral food systems and to enact local—and effective—change. Heat stress threatens human and livestock well-being in pastoral and agropastoral production systems across Africa. This Perspective explores the challenges, potential adaptations and future pathways for these food systems in the coming decades.
由于气候变化,预计整个非洲大陆的牧-农过渡区将面临作物生产困难。在某些地方,更加重视畜牧业生产可能是适当的应对措施。在此,我们将探讨热应激如何影响畜牧业生产和人类的工作能力。虽然适应性措施可以缓解与热应力有关的一些挑战,但还需要数据驱动的系统性变革和多方利益相关者的参与,以适应在制定牧区和农牧区粮食系统愿景时所涉及的复杂社会经济因素,并在当地进行有效的变革。
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引用次数: 0
Improved alternate wetting and drying irrigation increases global water productivity 改进干湿交替灌溉提高全球水生产力
IF 23.6 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-21 DOI: 10.1038/s43016-024-01081-z
Yan Bo, Xuhui Wang, Kees Jan van Groenigen, Bruce A. Linquist, Christoph Müller, Tao Li, Jianchang Yang, Jonas Jägermeyr, Yue Qin, Feng Zhou
Rice is the staple food for half of the world’s population but also has the largest water footprint among cereal crops. Alternate wetting and drying (AWD) is a promising irrigation strategy to improve paddy rice’s water productivity—defined as the ratio of rice yield to irrigation water use. However, its global adoption has been limited due to concerns about potential yield losses and uncertainties regarding water productivity improvements. Here, using 1,187 paired field observations of rice yield under AWD and continuous flooding to quantify AWD effects (ΔY), we found that variation in ΔY is predominantly explained by the lowest soil water potential during the drying period. We estimate that implementing a soil water potential-based AWD scheme could increase water productivity across 37% of the global irrigated rice area, particularly in India, Bangladesh and central China. These findings highlight the potential of AWD to promote more sustainable rice production systems and provide a pathway toward the sustainable intensification of rice cultivation worldwide. Alternate wetting and drying (AWD) optimizes water use in rice cultivation. This study shows that a soil water potential-based AWD scheme could minimize yield loss while increasing water productivity in 37% of global irrigated rice areas.
水稻是世界上一半人口的主食,但也是谷类作物中水足迹最大的作物。交替湿润和干燥(AWD)是一种很有前景的灌溉策略,可提高水稻的水分生产率(即水稻产量与灌溉用水量之比)。然而,由于对潜在产量损失的担忧以及对水生产率提高的不确定性,其在全球范围内的应用一直受到限制。在此,我们利用 1,187 个对 AWD 和连续淹水条件下水稻产量的配对田间观测数据来量化 AWD 效果(ΔY),结果发现,ΔY 的变化主要是由干旱期最低土壤水势造成的。我们估计,在全球 37% 的水稻灌溉区,尤其是印度、孟加拉国和中国中部地区,实施基于土壤水势的 AWD 计划可提高水分生产率。这些发现凸显了水稻全生育期灌溉在促进更可持续的水稻生产系统方面的潜力,并为全球水稻种植的可持续集约化提供了一条途径。
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引用次数: 0
Meat reduction in small portions 少量减肉
IF 23.6 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-21 DOI: 10.1038/s43016-024-01084-w
Machiel J. Reinders, Hans Dagevos
Reductions in meat consumption require dietary shifts and structural changes to our food system. Yet, a simple measure such as reducing the size of meat portions can already have an impact — and may help kick-off a longer-term shift.
要减少肉类消费,就必须改变饮食结构,改变我们的食品体系。然而,减少肉类份量这样简单的措施已经可以产生影响,并可能有助于启动长期的转变。
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引用次数: 0
Innovations for pesticide application must consider environmental impact 农药应用创新必须考虑对环境的影响
IF 23.6 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-20 DOI: 10.1038/s43016-024-01080-0
Tobias Dalhaus, Robert Finger, Asaf Tzachor, Niklas Möhring
Innovation in pesticide application is urgently needed. However, recent approaches, such as employing full-service pesticide contractors or utilizing artificial intelligence for pest control, may prioritize economic and production outcomes over environmental protection and public health. Here, we explore these propositions, their associated risks, and suggest a pathway for sustainable, risk-reduced pesticide decisions.
农药应用亟需创新。然而,最近的一些方法,如雇用全方位服务的农药承包商或利用人工智能进行害虫控制,可能会将经济和生产成果置于环境保护和公共健康之上。在此,我们将探讨这些主张及其相关风险,并提出一条可持续的、降低风险的农药决策之路。
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引用次数: 0
Co-benefits of agricultural diversification and technology for the environment and food security in China 中国农业多样化和技术对环境和粮食安全的共同效益
IF 23.6 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-12 DOI: 10.1038/s43016-024-01075-x
Thomas Cherico Wanger, Estelle Raveloaritiana, Siyan Zeng, Haixiu Gao, Xueqing He, Yiwen Shao, Panlong Wu, Kris A. G. Wyckhuys, Wenwu Zhou, Yi Zou, Zengrong Zhu, Ling Li, Haiyan Cen, Yunhui Liu, Shenggen Fan
Land consolidation in China is seen as a key strategy to increase resource use efficiency while maintaining high yields, yet it often reduces crop diversity. Reconciling consolidation, diversity and agricultural technology is key for food and nutrition security.
在中国,土地整理被视为在保持高产的同时提高资源利用效率的关键战略,但它往往会减少作物多样性。兼顾整合、多样性和农业技术是粮食和营养安全的关键。
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引用次数: 0
Nitrogen management across croplands 农田氮素管理
IF 23.6 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-12 DOI: 10.1038/s43016-024-01074-y
Ouping Deng, Baojing Gu
Effective nitrogen management at the local scale, through targeted practices, can enhance agricultural sustainability. However, it also necessitates consideration of climate change and socio-economic transformations.
通过有针对性的做法,在地方范围内进行有效的氮管理,可以提高农业的可持续性。不过,这也需要考虑气候变化和社会经济转型。
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引用次数: 0
Optimized agricultural management reduces global cropland nitrogen losses to air and water 优化农业管理减少全球耕地氮向空气和水中的流失
IF 23.6 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-12 DOI: 10.1038/s43016-024-01076-w
Luncheng You, Gerard H. Ros, Yongliang Chen, Fusuo Zhang, Wim de Vries
Nitrogen (N) losses from croplands substantially contribute to global N pollution. Assessing the reduction in N losses through improved N management practices is complex due to varying site conditions, such as land use, climate, soil properties and local farming methods. In this Article, we conducted a meta-analysis to evaluate the effects of improved practices on N loss reduction, analysing data from 1,065 studies with 6,753 pairs of observations comparing standard and optimized practices. Without considering site-specific conditions, optimized management practices can reduce N2O emissions by 3–39%, NH3 emissions by 15–68%, N run-off by 21–37% and N leaching by 19–52%. After considering local conditions and current practices, average reductions on a global scale were 31% for N2O, 23% for NH3, 18% for N run-off and 17% for N leaching. The effectiveness of N loss reduction was mainly influenced by optimized management practices and, to a lesser extent, site conditions. The results of this study underscore the importance of implementing optimized, site-specific management to effectively reduce N losses from global croplands. Increased agricultural nitrogen inputs lead to elevated nitrogen losses and may result in detrimental environmental impacts. This study uses meta-analyses to evaluate and predict changes in nitrogen losses to air and water in response to sustainable nutrient, crop and soil management practices.
耕地的氮(N)流失严重加剧了全球氮污染。由于土地利用、气候、土壤特性和当地耕作方法等现场条件各不相同,因此评估通过改进氮管理方法减少氮损失的情况非常复杂。在本文中,我们进行了一项荟萃分析,以评估改进方法对减少氮损失的影响,分析了来自 1,065 项研究的数据,其中有 6,753 对观察结果,对标准方法和优化方法进行了比较。在不考虑具体地点条件的情况下,优化管理方法可减少 3-39% 的 N2O 排放、15-68% 的 NH3 排放、21-37% 的 N 径流和 19-52% 的 N 沥滤。在考虑了当地条件和当前做法后,全球范围内的平均减排量分别为:N2O 31%、NH3 23%、N 径流 18%、N 沥滤 17%。减少氮流失的效果主要受优化管理方法的影响,其次是受当地条件的影响。这项研究的结果强调了针对具体地点实施优化管理以有效减少全球耕地氮损失的重要性。
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引用次数: 0
Enhanced sulfide burial in low-oxygen aquatic environments could offset the carbon footprint of aquaculture production 在低氧水生环境中加强硫化物掩埋可抵消水产养殖生产的碳足迹
IF 23.6 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-11 DOI: 10.1038/s43016-024-01077-9
Mojtaba Fakhraee, Noah J. Planavsky
Carbon removal from the atmosphere is needed to keep global mean temperature increases below 2 °C. Here, we develop a model to explore how alkalinity production through enhanced iron sulfide formation in low-oxygen aquatic environments, such as aquaculture systems, could offer a cost-effective means of CO2 removal. We show that enhanced sulfide burial through the supply of reactive iron to surface sediments may be able to capture up to a hundred million tonnes of CO2 per year, particularly in countries with the highest number of fish farms, such as China and Indonesia. These efforts could largely offset the carbon footprint associated with their aquaculture industry. Enhanced sulfide burial could directly benefit both fish farms and surrounding ecosystems by removing toxic sulfide from aquatic systems, providing an addition to durable global CO2 removal markets and a path towards large-scale, carbon-neutral aquatic food production. A model simulating the carbon cycle in low-oxygen aquatic environments suggests a potential pathway to increase alkalinity production and carbon dioxide uptake, offering an affordable and scalable method of carbon capture in aquaculture systems.
要将全球平均气温升幅控制在 2 ℃ 以下,就必须从大气中去除碳。在这里,我们建立了一个模型来探索如何通过在低氧水生环境(如水产养殖系统)中强化硫化铁的形成来产生碱度,从而提供一种具有成本效益的二氧化碳去除方法。我们的研究表明,通过向表层沉积物提供活性铁来强化硫化物埋藏,每年可捕获多达一亿吨的二氧化碳,尤其是在中国和印度尼西亚等养鱼场数量最多的国家。这些努力可以在很大程度上抵消与水产养殖业相关的碳足迹。强化硫化物掩埋可通过清除水生系统中的有毒硫化物,使养鱼场和周围生态系统直接受益,为持久的全球二氧化碳清除市场增添新的活力,并为实现大规模、碳中性水生食品生产提供一条途径。
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引用次数: 0
Inequality in agricultural greenhouse gas emissions intensity has risen in rural China from 1993 to 2020 1993 至 2020 年中国农村农业温室气体排放强度的不平等有所上升
IF 23.6 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-04 DOI: 10.1038/s43016-024-01071-1
Xiangbo Xu, Qiran Zhao, Jianbing Guo, Chang Li, Jing Li, Kunyu Niu, Shuqin Jin, Chao Fu, Paul P. J. Gaffney, Yan Xu, Mingxing Sun, Yinghao Xue, Dunhu Chang, Yumei Zhang, Wei Si, Shenggen Fan, Linxiu Zhang
Reducing greenhouse gas (GHG) emissions in crop production while ensuring emission equity is crucial for sustainable agriculture in China, yet long-term large-scale data on GHG emissions intensity (GEI) are limited. Using an extensive dataset based on surveyed farm households (n > 430,000 households) from 1993 to 2020, we reveal that 2015 was a turning point for GEI levels, which dropped 16% in 2020, while inequality—measured as average GHG emissions per unit planted area—increased 13%. The key driving forces behind such trends included farmland input, all other inputs, agricultural labour input and total factor productivity but not capital input. Notably, farmland input and all other inputs contributed to 80% of the inequality, while contribution of total factor productivity gradually declined and was replaced by migration-induced agricultural labour input differences. Reducing GEI levels and guarding against widening inequality require optimizing production factor inputs. Understanding greenhouse gas (GHG) emission patterns in crop production, particularly their spatial and temporal distributions, is key to designing better policies. This study combines secondary data and household survey data to examine the GHG emissions intensity of croplands in China and how it has fluctuated in the past few decades and to identify the factors driving emissions intensity inequality.
减少农作物生产过程中的温室气体(GHG)排放,同时确保排放公平对中国农业可持续发展至关重要,但有关温室气体排放强度(GEI)的长期大规模数据却十分有限。通过使用基于 1993 年至 2020 年调查农户(43 万户)的广泛数据集,我们发现 2015 年是温室气体排放强度水平的转折点,到 2020 年温室气体排放强度下降了 16%,而以单位种植面积平均温室气体排放量衡量的不平等则增加了 13%。这种趋势背后的主要驱动力包括农田投入、所有其他投入、农业劳动力投入和全要素生产率,但不包括资本投入。值得注意的是,耕地投入和所有其他投入造成了 80% 的不平等,而全要素生产率的贡献逐渐下降,取而代之的是移民导致的农业劳动力投入差异。要降低 GEI 水平并防止不平等扩大,就必须优化生产要素投入。
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引用次数: 0
Smaller meat portions contribute the most to reducing meat consumption in the United Kingdom 在英国,肉类份量越小越有助于减少肉类消费
IF 23.6 Q1 FOOD SCIENCE & TECHNOLOGY Pub Date : 2024-11-01 DOI: 10.1038/s43016-024-01070-2
Alexander Vonderschmidt, Lindsay M. Jaacks, Peter Alexander, Rosemary Green, Alexandra L. Bellows, Cristina Stewart
Reducing meat consumption can help improve environmental and health outcomes, yet the effect of specific meat-reducing strategies is context dependent. Here, using decomposition analysis of National Diet and Nutrition Survey data (2008–2009 to 2018–2019), we found that in the United Kingdom, reduced meat portions had the largest impact on total meat consumption decline (52%), followed by fewer meat-eating days (24%), fewer meat consumers (17%) and fewer meat-eating meal occasions (7%). Understanding meat consumption behaviour patterns is key for more effective policies. Strategies to change meat consumption patterns remain poorly understood. Using decomposition analysis, this study shows that the decline in UK meat consumption is driven by the consumption of smaller portions of meat, followed by reducing the number of days and occasions on which meat is consumed.
减少肉类消费有助于改善环境和健康结果,但具体的减少肉类消费策略的效果取决于具体情况。在此,通过对全国膳食与营养调查数据(2008-2009 年至 2018-2019 年)进行分解分析,我们发现在英国,肉类份量的减少对肉类总消费量的下降影响最大(52%),其次是食肉天数减少(24%)、肉类消费者减少(17%)和食肉用餐次数减少(7%)。了解肉类消费行为模式是制定更有效政策的关键。
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引用次数: 0
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Nature food
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