Improving rotational partners: Intraspecies variation for pea cover cropping traits

IF 1.3 Q3 AGRONOMY
Edward Marques, Lauren Kerwien, Erika Bueno, Eric Bishop-von Wettberg
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Abstract

To improve cover crops such as peas (Pisum sativum), as rotational partners, intraspecific variation for cover cropping traits such as nutrient mobilization, carbon deposition, and beneficial microbial recruitment must be identified. The majority of research on cover crops has focused on interspecies comparisons for cover cropping variation with minimal research investigating intraspecies variation. To address if variation of cover cropping traits is present within a cover cropping species, we grew 15 diverse accessions (four modern cultivars, three landraces, and eight wild accessions) of pea in a certified organic setting. We measured various cover cropping traits, such as nutrient mobilization, soil organic matter deposition, and microbial recruitment, and quantified the effect of pea accession on the growth and yield of a subsequently planted crop of corn (Zea mays). We discovered that the domestication history of pea has a significant impact on soil properties. Specifically, domesticated peas (modern cultivars and landraces) had higher average plant–soil feedback values for amounts of nitrogen, carbon, and manganese compared to wild peas. Additionally, no variation for prokaryotic recruitment (α- and β-diversity) was observed within pea; however, we did observe significant variation for fungal recruitment (α- and β-diversity) due to domestication and accession. Our results demonstrate that there is variation present in peas, and likely all crops, that can be selected to improve them as rotational partners to ultimately boost crop yields in sustainable agroecosystems.

Abstract Image

改善轮作伙伴:豌豆覆盖种植性状的种内变异
要改进豌豆等作为轮作伙伴的覆盖作物,就必须确定覆盖作物特性(如养分调动、碳沉积和有益微生物招募)的种内变异。大多数有关覆盖作物的研究都集中在覆盖作物变异的种间比较上,很少有研究调查种内变异。为了解决覆盖作物品种内部是否存在覆盖作物性状变异的问题,我们在经认证的有机环境中种植了 15 个不同的豌豆品种(4 个现代栽培品种、3 个陆生品系和 8 个野生品系)。我们测量了各种覆盖种植特性,如养分调动、土壤有机质沉积和微生物繁殖,并量化了豌豆品种对随后种植的玉米(玉米)生长和产量的影响。我们发现,豌豆的驯化历史对土壤特性有重大影响。具体来说,与野生豌豆相比,驯化豌豆(现代栽培品种和陆生品系)的氮、碳和锰含量的植物-土壤平均反馈值更高。此外,在豌豆中没有观察到原核生物迁移(α- 和 β-多样性)的差异;但是,我们观察到真菌迁移(α- 和 β-多样性)因驯化和加入而存在显著差异。我们的研究结果表明,豌豆以及所有作物都存在变异,可以通过选择来改善它们的轮作能力,最终提高可持续农业生态系统中的作物产量。
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来源期刊
Agrosystems, Geosciences & Environment
Agrosystems, Geosciences & Environment Agricultural and Biological Sciences-Agricultural and Biological Sciences (miscellaneous)
CiteScore
2.60
自引率
0.00%
发文量
80
审稿时长
24 weeks
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