Rotational complexity increases cropping system output under poorer growing conditions

IF 15.1 1区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
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引用次数: 0

Abstract

Growing multiple crops in rotation can increase the sustainability of agricultural systems and reduce risks from increasingly adverse weather. However, widespread adoption of diverse rotations is limited by economic uncertainty, lack of incentives, and limited information about long-term outcomes. Here, we combined 36,000 yield observations from 20 North American long-term cropping experiments (434 site-years) to assess how greater crop diversity impacts productivity of complete rotations and their component crops under varying growing conditions. Maize and soybean output increased as the number of species and rotation length increased, while results for complete rotations varied by site depending on which crops were present. Diverse rotations reduced rotation-level output at eight sites due to the addition of lower-output crops such as small grains, illustrating trade-offs. Diverse rotations positively impacted rotation-level output under poor growing conditions, which illustrates how diverse cropping systems can reduce the risk of crop loss in a changing climate.

Abstract Image

在较差的生长条件下,轮作的复杂性可提高种植系统的产量
轮作种植多种作物可以提高农业系统的可持续性,降低日益恶劣的天气带来的风险。然而,由于经济上的不确定性、缺乏激励措施以及有关长期结果的信息有限,多样化轮作的广泛采用受到了限制。在此,我们综合了来自 20 个北美长期种植试验(434 个地点年)的 36,000 个产量观测数据,以评估在不同的生长条件下,提高作物多样性如何影响完整轮作及其组成作物的生产力。玉米和大豆的产量随着作物种类的增加和轮作时间的延长而提高,而完全轮作的结果则因地而异,取决于哪些作物存在。由于增加了小杂粮等产量较低的作物,多样化轮作降低了八个地点的轮作产量,这说明了权衡的问题。在生长条件较差的情况下,多样化轮作对轮作水平的产出产生了积极影响,这说明了多样化种植系统如何在不断变化的气候中降低作物损失的风险。
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来源期刊
One Earth
One Earth Environmental Science-Environmental Science (all)
CiteScore
18.90
自引率
1.90%
发文量
159
期刊介绍: One Earth, Cell Press' flagship sustainability journal, serves as a platform for high-quality research and perspectives that contribute to a deeper understanding and resolution of contemporary sustainability challenges. With monthly thematic issues, the journal aims to bridge gaps between natural, social, and applied sciences, along with the humanities. One Earth fosters the cross-pollination of ideas, inspiring transformative research to address the complexities of sustainability.
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