A global meta-analysis of yield stability in organic and conservation agriculture.
A global meta-analysis of yield stability in organic and conservation agriculture.
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DOI：
10.1038/s41467-018-05956-1
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发表时间：
2018-09-07
影响因子：
16.6
通讯作者：
van der Heijden MGA
中科院分区：
文献类型：
--
作者：
Knapp S;van der Heijden MGA
我们时代的主要挑战之一是加强全球粮食生产和安全。农业系统中的大多数评估侧重于植物产量。然而，这些分析忽略了产量的时间稳定性，或多年生产的可变性和可靠性。在这里，我们进行了一项荟萃分析，以评估三种主要种植系统的时间产量稳定性：有机农业和保护性农业（免耕）与传统农业，比较了基于2896项比较的193项研究。有机农业单位产量的时间稳定性（-15%）明显低于传统农业。因此，虽然有机耕作促进生物多样性，而且一般来说更有利于环境，但今后的努力应侧重于减少其产量变异。我们的分析进一步表明，使用绿色肥料和强化施肥可以减少有机农业和传统农业之间的产量稳定性差距。免耕的时间稳定性（-3%）与传统耕作的时间稳定性没有显著差异，表明过渡到免耕不会影响产量稳定性。不同种植制度的产量各不相同，但其时间稳定性尚未量化。在这里，克纳普和货车德海登提出了一个荟萃分析表明，在有机农业产量，每单位粮食生产，时间稳定性较低。
One of the primary challenges of our time is to enhance global food production and security. Most assessments in agricultural systems focus on plant yield. Yet, these analyses neglect temporal yield stability, or the variability and reliability of production across years. Here we perform a meta-analysis to assess temporal yield stability of three major cropping systems: organic agriculture and conservation agriculture (no-tillage) vs. conventional agriculture, comparing 193 studies based on 2896 comparisons. Organic agriculture has, per unit yield, a significantly lower temporal stability (−15%) compared to conventional agriculture. Thus, although organic farming promotes biodiversity and is generally more environmentally friendly, future efforts should focus on reducing its yield variability. Our analysis further indicates that the use of green manure and enhanced fertilisation can reduce the yield stability gap between organic and conventional agriculture. The temporal stability (−3%) of no-tillage does not differ significantly from those of conventional tillage indicating that a transition to no-tillage does not affect yield stability. Yields vary between different cropping systems, though their temporal stability has not been quantified. Here, Knapp and van der Heijden present a meta-analysis showing that yields in organic agriculture have, per unit food produced, a lower temporal stability.
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影响因子：
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作者：
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通讯作者：
Lajeunesse, Marc J.
影响因子：
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