Correction: Effect of crop rotational position and nitrogen supply on root development and senescence of winter wheat

Jessica Arnhold¹Dennis Grunwald^1*Andrea Braun-Kiewnick²Heinz-Josef Koch¹

• ¹Department of Agronomy, Institute of Sugar Beet Research, Göttingen, Germany
• ²Institute for Epidemiology and Pathogen Diagnostics, Julius Kühn-Institute - Federal Research Centre for Cultivated Plants, Braunschweig, Germany

The original version of this article has been updated. Wrong contentThere was a mistake in figure 3 as published. The values for root length density in 30-120 cm were erroneously calculated as sum and not as mean of three separately analysed soil depths (30-60, 60-90 and 90-120 cm). Additionally, the values for root length density in 30-120 cm in 2022 were erroneously copied from 2020. The corrected figure 3 appears below.The original version of this article has been updated. There was a mistake in the caption of figure 3 as published. The values mentioned in the last sentence ("RLD varied significantly with W1 (2.2 ± 0.9 cm cm -3 ) > WM (1.4 ± 0.5 cm cm -3 ) and W2 (1.3 ± 0.3 cm cm -3 ) in 30-120 cm soil depth.") were erroneously calculated as sum and not as mean of three separately analysed soil depths (30-60, 60-90 and 90-120 cm). The corrected caption of figure 3 appears below."Effect of the crop rotational position of winter wheat (W1 = first wheat after oilseed rape, W2 = second wheat after oilseed rape, WM = wheat monoculture) on root length density (RLD) in two soil depths at BBCH 69 in Harste, n = 6, mean across N fertilization. Bars show means with standard deviation.Lowercase letters show significant differences between means in each depth and capital letters show significant differences between means of each year (p < 0.05). RLD varied significantly with W1 (0.7 ± 0.3 cm cm -3 ) > WM (0.5 ± 0.2 cm cm -3 ) and W2 (0.4 ± 0.1 cm cm -3 ) in 30-120 cm soil depth."The original version of this article has been updated. Adding/removing textIn the abstract, an erroneous statement based on the above-mentioned errors has been made in the last part of the sentence "Subsoil root length density of winter wheat was significantly higher after oilseed rape as pre-crop than after wheat, which was independent of take-all occurrence." This has been corrected to read: "Subsoil root length density of winter wheat was significantly higher after oilseed rape as pre-crop than after wheat."The original version of this article has been updated. Adding/removing text Wrong numbers have been mentioned in the third paragraph of the results section due to the abovementioned errors.A correction has been made to the second sentence of the third paragraph of the results section: "In 30-120 cm soil depth at BBCH 69, RLD varied significantly with W1 (0.7 ± 0.3 cm cm -3 ) > WM (0.5 ± 0.2 cm cm -3 ) and W2 (0.4 ± 0.1 cm cm -3 ) across all study years (Figure 3)."The original version of this article has been updated.Wrong numbers have been mentioned in the discussion section due to the above-mentioned errors.A correction has been made to the first sentence of the Discussion: "Across all years and sampling depths and dates, wheat RLD range (0.1-4.4 cm cm -3 ) was mostly within the range of RLD reported for cereals in other studies (0.2-2.75 cm cm -3 , Muñoz-Romero et al., 2010;Liu et al., 2011)."The original version of this article has been updated.One erroneous statement ("As this effect occurred across all study years independent of weather conditions, this benefit of oilseed rape compared to wheat as pre-crop seems to be independent of soil conditions in the topsoil.") and one imprecise statement ("subsoil RLD at BBCH 69 showed highest values in W1 in all years") based on the above-mentioned errors have been made in the discussion section.A correction has been made to the third paragraph of the subsection "Root growth", discussion section: "In contrast to the topsoil, subsoil RLD at BBCH 69 showed highest values in W1 in the mean over all years, which might have been caused by the taproot of oilseed rape pre-crop, allowing for a higher rooting depth and larger root system of the following crop (Perkons et al., 2014)."The original version of this article has been updated.An erroneous statement ("In 2022, despite a lack of differences in topsoil RLD between the crop rotational positions, the higher grain yield for W1 might have been caused by RLD differences in the subsoil and additionally a shift in the rhizosphere microbiome in the topsoil and a higher/ more efficient nutrient acquisition.") based on the above-mentioned errors was made in the discussion section.A correction has been made to the first sentence of the fourth paragraph of the subsection "Relationship of aboveground biomass and yield to root growth" of the discussion section: "In 2022, the higher grain yield for W1 despite a lack of differences in top-and subsoil RLD between the crop rotational positions might have been caused by a shift in the rhizosphere microbiome in the topsoil and a higher or more efficient nutrient acquisition."The original version of this article has been updated.An erroneous statement ("To sum up, subsoil RLD of winter wheat was higher after oilseed rape as precrop compared to winter wheat as pre-crop at a later growth stage, which was independent of take-all occurrence and corresponded to a higher wheat biomass and final grain yield.") based on the abovementioned errors was made in the discussion section.A correction has been made to the first sentence of the fifth paragraph of the subsection "Relationship of aboveground biomass and yield to root growth" of the discussion section: "To sum up, subsoil RLD of winter wheat was higher after oilseed rape as pre-crop compared to winter wheat as pre-crop at a later growth stage, which corresponded to a higher wheat biomass and final grain yield."The original version of this article has been updated.