Universität zu Köln

Bublitz, Tabata Aline ORCID: 0000-0002-0231-3217, Kemper, Roman, Mueller, Phillip, Kautz, Timo ORCID: 0000-0002-7906-8512, Doering, Thomas F. and Athmann, Miriam (2022). Relating Profile Wall Root-Length Density Estimates to Monolith Root-Length Density Measurements of Cover Crops. Agronomy-Basel, 12 (1). BASEL: MDPI. ISSN 2073-4395

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Abstract

Different methods have been proposed for in situ root-length density (RLD) measurement. One widely employed is the time-consuming sampling of soil cores or monoliths (MO). The profile wall (PW) method is a less precise, but faster and less laborious alternative. However, depth-differentiated functions to convert PW RLD estimates to MO RLD measurements have not yet been reported. In this study, we perform a regression analysis to relate PW results to MO results and determine whether calibration is possible for distinct crop groups (grasses, brassicas and legumes) consisting of pure and mixed stands, and whether soil depth affects this calibration. The methods were applied over two years to all crop groups and their absolute and cumulative RLD were compared using a linear (LR) and multiple linear (MLR) regression. PW RLD was found to highly underestimate MO RLD in absolute values and in highly rooted areas. However, a close agreement between both methods was found for cumulative root-length (RL) when applying MLR, highlighting the influence of soil depth. The level of agreement between methods varied strongly with depth. Therefore, the application of PW as the main RLD estimation method can provide reliable estimates of cumulative root distribution traits of cover crops.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bublitz, Tabata Aline UNSPECIFIED orcid.org/0000-0002-0231-3217 UNSPECIFIED Kemper, Roman UNSPECIFIED UNSPECIFIED UNSPECIFIED Mueller, Phillip UNSPECIFIED UNSPECIFIED UNSPECIFIED Kautz, Timo UNSPECIFIED orcid.org/0000-0002-7906-8512 UNSPECIFIED Doering, Thomas F. UNSPECIFIED UNSPECIFIED UNSPECIFIED Athmann, Miriam UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-678100
DOI:	10.3390/agronomy12010048
Journal or Publication Title:	Agronomy-Basel
Volume:	12
Number:	1
Date:	2022
Publisher:	MDPI
Place of Publication:	BASEL
ISSN:	2073-4395
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NITROGEN CATCH CROPS; SOIL CORE; MINIRHIZOTRON; GROWTH; COUNTS; MODELS Multiple languages Agronomy; Plant Sciences Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/67810