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Journal of Agriculture, Food Systems, and Community Development最新文献

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The evolution of a partnership-based breeding program for organic corn 基于伙伴关系的有机玉米育种计划的演变
Pub Date : 2023-11-17 DOI: 10.5304/jafscd.2023.131.011
Walter Goldstein
This paper describes decades of research develop­ing a new type of corn (maize) cultivar that utilizes partnerships with seed-borne, bacterial endophytes to create environmentally friendly, nutritious corn that is better adapted to organic farming. Over time the project engaged and formed multiple, evolving networks of corn breeders and other scientists, organic farmers, nongovernmental organizations (NGOs), private companies, the U.S. Department of Agriculture Agricultural Research Service (USDA-ARS), and state agricultural univer­sities in several states. It addressed and partly resolved the need for developing (a) yield-competi­tive hybrids with greater nutrient density (methio­nine and minerals), (b) better adapted inbreds for organic production conditions, and (c) reduced pollution from nitrogen fertilizers. The partnership approach taken also differs from usual top-down mechanistic breeding approaches in that the methods of breeding entailed holistic attention, learning, and respect for what turned out to be corn plants evolving in symbiogenesis with beneficial microbial partners. Initial studies indicate that the resulting corn from the program is competitive in yield but has better nutritional value. It obtains more of its nitrogen from microbial biomass and organic matter and nitrogen fixation than does conventional corn. Its performance partially depends on seed-borne plant/microbial partnerships. This corn continues to be developed at the Mandaamin Institute but is also being commercially introduced for testing by farmers.
本文介绍了数十年来开发一种新型玉米(玉米)栽培品种的研究工作,这种栽培品种利用与种子传播的细菌内生菌的合作关系,创造出更适合有机农业的环保型营养玉米。随着时间的推移,该项目与玉米育种家和其他科学家、有机农户、非政府组织、私营公司、美国农业部农业研究局(USDA-ARS)以及几个州的州立农业大学建立了多种不断发展的网络。该项目满足并部分解决了以下需求:(a) 开发具有产量竞争力、营养密度(蛋氨酸和矿物质)更高的杂交种;(b) 开发更适合有机生产条件的近交种;(c) 减少氮肥污染。所采取的合作方法也不同于通常的自上而下的机械育种方法,因为育种方法需要全面关注、学习和尊重玉米植物与有益微生物伙伴的共生进化。初步研究表明,该计划培育出的玉米产量具有竞争力,但营养价值更高。与传统玉米相比,它能从微生物生物量、有机物和固氮作用中获得更多的氮。其性能部分取决于种子传播的植物/微生物伙伴关系。这种玉米将继续在曼达明研究所开发,但也正在进行商业推广,供农民测试。
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引用次数: 0
Does participation in livelihood education programs impact household food security? A comparative study in rural Uganda 参与生计教育计划会影响家庭粮食安全吗?乌干达农村地区比较研究
Pub Date : 2023-11-17 DOI: 10.5304/jafscd.2023.131.009
Samuel Ikendi, Francis Owusu, D. Masinde, Ann Oberhauser, Carmen Bain
Food and nutrition security projections from global to household levels show that the future requires multifaceted approaches to achieve desired goals. In Uganda, the government has tried several strate­gies to promote food production, including a public-private partnership with Iowa State Univer­sity through its Center for Sustainable Rural Liveli­hoods. In this comparative study, we surveyed 454 households to explore whether participation in livelihood education programs (LEPs) impact household food security. We also determine which LEPs and household characteristics influence food security. Overall, 46.3% of the surveyed house­holds were food secure, while the remaining were insecure or extremely insecure. Significantly, 51.0% of LEP participants were more food secure, com­pared to 35.5% of nonparticipants. Specific LEPs including agronomy and postharvest technologies, and livestock integration significantly influence food security, but less so for programs on nutrition and infant feeding, water supply and public health, complementary services like therapeutic porridge and assistance with immunization, and income innovations. Multinomial logistic regression analy­sis revealed that the household characteristics of keeping livestock and the number of meals eaten during periods of scarcity, influenced households having more food security than insecurity or extreme insecurity. Households participating in LEPs, having larger acreage of land, and having clean water and sanitation facilities were more food secure. The time taken to fetch water, days of ill­ness of male adults, and belonging to community social groups, also influence the level of household food security. Based on these findings, we recom­mend that households should participate in LEPs to build their capacity to manage crop and live­stock production, and also to acquire knowledge of nutrition and feeding, public health, and income innovations.
从全球到家庭层面的粮食和营养安全预测表明,未来需要多方面的方法来实现预期目标。在乌干达,政府尝试了多种战略来促进粮食生产,其中包括通过爱荷华州立大学可持续农村生计中心与该大学建立公私合作伙伴关系。在这项比较研究中,我们对 454 个家庭进行了调查,以探讨参与生计教育计划(LEPs)是否会影响家庭粮食安全。我们还确定了哪些生计教育计划和家庭特征会影响粮食安全。总体而言,46.3% 的受访家庭有粮食安全保障,其余家庭没有粮食安全保障或极度没有粮食安全保障。值得注意的是,与 35.5%的非参与者相比,51.0%的 LEP 参与者更有粮食保障。包括农艺和收获后技术以及牲畜一体化在内的特定 LEP 对粮食安全有显著影响,但对营养和婴儿喂养、供水和公共卫生、食疗粥和免疫接种援助等补充服务以及收入创新计划的影响较小。多项式逻辑回归分析表明,饲养牲畜的家庭特征和匮乏时期的进餐次数对粮食安全的影响大于不安全或极端不安全。参加低保的家庭、拥有较大面积土地的家庭以及拥有清洁水和卫生设施的家庭更有粮食保障。取水所需的时间、成年男性生病的天数以及是否属于社区社会团体也会影响家庭的粮食安全水平。根据上述研究结果,我们建议家庭参加地方环境方案,以提高他们管理作物和牲畜生产的能力,并获得营养与喂养、公共卫生和收入创新方面的知识。
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引用次数: 0
The Economic Pamphleteer: Local Food: Another Food Fad or Food of the Future? 经济小册子》:当地食品:另一种食品时尚还是未来食品?
Pub Date : 2020-03-25 DOI: 10.5304/jafscd.2020.093.005
J. Ikerd
First paragraph: When anticipating the future, many experts simply examine trends of the past and project them into the future—as if trends continue indefinitely. However, one of the most fundamental principles of science is that everything on earth tends to cycle—whether physically, ecologically, economically, or socially (Culotta, 1991; Pool, 1991). All trends eventually stall out and reverse direction. Some apparent aberrations or blips in trends turn out to be harbingers of impending reversals. Some see the reemergence of farmers markets and popularity of locally grown foods as a passing fad or a blip in a continuing trend toward the globalization of the food system. Others see the local food movement as a harbinger of fundamental change. . . .
第一段:在预测未来时,许多专家只是简单地研究过去的趋势,并将其推测到未来--好像趋势会无限期地持续下去。然而,科学最基本的原则之一是,地球上的一切事物都趋向于循环往复--无论是物理的、生态的、经济的还是社会的(Culotta, 1991; Pool, 1991)。所有趋势最终都会停滞并逆转方向。趋势中一些明显的反常现象或小插曲最终会成为即将发生逆转的先兆。有些人认为,农贸市场的重新兴起和本地种植食品的流行是一种过眼云烟,或者是食品系统全球化持续趋势中的一个小插曲。另一些人则认为本地食品运动预示着根本性的变革。. . .
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引用次数: 8
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Journal of Agriculture, Food Systems, and Community Development
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