Kassandra Pelletier, Marie-Noëlle Thivierge, Martin H. Chantigny, Gilles Bélanger, Émilie Maillard, Denis A. Angers, Chantal Lachance, Anne Vanasse, Caroline Halde
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Roots of subsequent corn and soybean were sampled by coring (0–45 cm), washed, and digitized for image analysis.</p><h3 data-test=\"abstract-sub-heading\">Results</h3><p>Crop rotations including perennial crops rather than only annual crops resulted in greater total net annual productivity in corn (+ 20%) and soybean (+ 21%), corn root biomass (+ 31%) and length density (+ 106%), and proportion of fine roots. Compared to the alfalfa-grass mixture, grass-only mixtures resulted in a greater corn root biomass (+ 23%) and length density (+ 54%). A longer duration (5 vs. 3 years) of the alfalfa-grass mixture improved corn root length density (+ 37%) and corn and soybean fine root proportion at depth, suggesting benefits from maintaining perennial forage stands over time. Mineral fertilizer versus slurry improved root traits of subsequent corn and soybean when applied to perennial but not annual crops.</p><h3 data-test=\"abstract-sub-heading\">Conclusion</h3><p>Our results highlight the positive response of corn and soybean root traits to the presence, species composition, and duration of perennial forage crops, extending further their benefits within rotations.</p>","PeriodicalId":20223,"journal":{"name":"Plant and Soil","volume":"41 1","pages":""},"PeriodicalIF":3.9000,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Corn and soybean root traits improved by preceding perennial forage crops\",\"authors\":\"Kassandra Pelletier, Marie-Noëlle Thivierge, Martin H. Chantigny, Gilles Bélanger, Émilie Maillard, Denis A. Angers, Chantal Lachance, Anne Vanasse, Caroline Halde\",\"doi\":\"10.1007/s11104-025-07532-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<h3 data-test=\\\"abstract-sub-heading\\\">Background and aims</h3><p>Benefits for soil health associated with crop rotations can improve plant aboveground biomass, although the effect on root traits is unclear. The aim of this study was to measure the legacy effect of crop rotations typical of dairy farms on root traits of subsequent forage corn (<i>Zea mays</i> L.) and soybean (<i>Glycine max</i> [L.] Merr.).</p><h3 data-test=\\\"abstract-sub-heading\\\">Methods</h3><p>On a silty clay in eastern Canada, six rotations were compared, varying in crop species (perennials and/or annuals) and fertilizer sources (dairy cattle slurry and/or mineral fertilizer) for 5 years. Roots of subsequent corn and soybean were sampled by coring (0–45 cm), washed, and digitized for image analysis.</p><h3 data-test=\\\"abstract-sub-heading\\\">Results</h3><p>Crop rotations including perennial crops rather than only annual crops resulted in greater total net annual productivity in corn (+ 20%) and soybean (+ 21%), corn root biomass (+ 31%) and length density (+ 106%), and proportion of fine roots. Compared to the alfalfa-grass mixture, grass-only mixtures resulted in a greater corn root biomass (+ 23%) and length density (+ 54%). A longer duration (5 vs. 3 years) of the alfalfa-grass mixture improved corn root length density (+ 37%) and corn and soybean fine root proportion at depth, suggesting benefits from maintaining perennial forage stands over time. 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Corn and soybean root traits improved by preceding perennial forage crops
Background and aims
Benefits for soil health associated with crop rotations can improve plant aboveground biomass, although the effect on root traits is unclear. The aim of this study was to measure the legacy effect of crop rotations typical of dairy farms on root traits of subsequent forage corn (Zea mays L.) and soybean (Glycine max [L.] Merr.).
Methods
On a silty clay in eastern Canada, six rotations were compared, varying in crop species (perennials and/or annuals) and fertilizer sources (dairy cattle slurry and/or mineral fertilizer) for 5 years. Roots of subsequent corn and soybean were sampled by coring (0–45 cm), washed, and digitized for image analysis.
Results
Crop rotations including perennial crops rather than only annual crops resulted in greater total net annual productivity in corn (+ 20%) and soybean (+ 21%), corn root biomass (+ 31%) and length density (+ 106%), and proportion of fine roots. Compared to the alfalfa-grass mixture, grass-only mixtures resulted in a greater corn root biomass (+ 23%) and length density (+ 54%). A longer duration (5 vs. 3 years) of the alfalfa-grass mixture improved corn root length density (+ 37%) and corn and soybean fine root proportion at depth, suggesting benefits from maintaining perennial forage stands over time. Mineral fertilizer versus slurry improved root traits of subsequent corn and soybean when applied to perennial but not annual crops.
Conclusion
Our results highlight the positive response of corn and soybean root traits to the presence, species composition, and duration of perennial forage crops, extending further their benefits within rotations.
期刊介绍：
Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.
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