A tale of two fields: Management legacy, soil health, and productivity

IF 2.3 4区农林科学 Q1 AGRICULTURE, MULTIDISCIPLINARY Agricultural & Environmental Letters Pub Date : 2022-09-07 DOI:10.1002/ael2.20090

Jeffrey Svedin, Newell R. Kitchen, Curtis J. Ransom, Kristen S. Veum, Robert L. Myers

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Abstract

Adjacent fields with contrasting histories present an opportunity to evaluate the legacy of management on soil health (SH) and grain productivity. In 2011, two fields transitioned to no-till grain production. During the previous 25 yr, one was pasture (pasture-to-grain; PTG), whereas the other was annually tilled for grain cropping (long-term grain; LTG). The study objectives were to contrast these two fields relative to SH and productivity. Yield data was collected from 2011 to 2021 and SH sampled in 2021. The PTG out-yielded LTG each year, with an average 46% yield increase. 2021 SH metrics demonstrated similar trends, with PTG 62% higher than LTG. Contrasting across fields (2020–2021), SH metrics were related to yield (r² = .46–.78), but these relationships weakened when assessed within each field. These findings affirm SH indicators are sensitive to the legacy of management and are meaningful indicators of productivity across sites but less informative for within-field variability.

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这是一个关于两个领域的故事:管理遗产、土壤健康和生产力

具有对比历史的相邻农田为评估土壤健康(SH)和粮食生产力管理遗留问题提供了机会。2011年，有两块土地转为免耕粮食生产。在过去的25年里，一个是牧场(牧场-粮食;PTG)，而另一个是每年耕作的粮食作物(长期粮食;LTG)。研究的目的是对比这两个领域相对于SH和生产力。2011年至2021年收集了产量数据，并在2021年对SH进行了采样。PTG每年产出LTG，平均产量增加46%。2021年的SH指标也表现出类似的趋势，PTG比LTG高62%。跨田对比(2020-2021)，SH指标与产量相关(r2 = 0.46 - 0.78)，但在每个田内评估时，这些关系减弱。这些发现证实了SH指标对管理遗留问题很敏感，并且是跨站点的生产力的有意义的指标，但对于场内变异性的信息较少。

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