Prof. Dr. Timo Kautz

Profil

Zusammenfassung

Prof. Kautz erforscht, wie Pflanzenwurzeln Nährstoffe und Wasser aus dem Boden aufnehmen, insbesondere unter schwierigen Bedingungen wie Nährstoffmangel oder verdichteten Bodenschichten. Seine Expertise umfasst die Rolle von Bodenporen (besonders durch Regenwürmer und Wurzeln gebildet) für das Wurzelwachstum und die Bodenfruchtbarkeit. Diese Erkenntnisse sind praktisch wertvoll für nachhaltige Anbausysteme und die Optimierung von Bodenmanagement in der Landwirtschaft.

Skills

Name

Prof. Dr. Timo Kautz

Titel

Prof. Dr.

Fakultät

Lebenswissenschaftliche Fakultät

Institut

Albrecht Daniel Thaer-Institut für Agrar- und Gartenbauwissenschaften

Arbeitsgruppe

Pflanzenbau

E-Mail

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Telefon

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HU-FIS-Profil

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28.6.2026, 01:07:37

• BonaRes -(Modul A, Phase 2): Soil 3- II - Nachhaltiges Unterbodenmanagement, Teilprojekt G

  Quelle ↗

  Förderer: Bundesministerium für Forschung, Technologie und Raumfahrt Zeitraum: 10/2018 - 01/2022 Projektleitung: Prof. Dr. Timo Kautz, Kathlin Schweitzer

• Healthy plants from healthy soils: Resilience and stability of organic cropping systems

  Quelle ↗

  Förderer: Andere inländische Stiftungen Zeitraum: 02/2016 - 10/2017 Projektleitung: Prof. Dr. Timo Kautz

• Wurzeln im bioporennahen Boden

  Quelle ↗

  Förderer: DFG Sachbeihilfe Zeitraum: 01/2019 - 06/2021 Projektleitung: Prof. Dr. Timo Kautz

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• Nutrient acquisition from arable subsoils in temperate climates: A review

  2012

  Soil Biology and Biochemistry · 333 Zitationen · DOI

• Nutrient deficiency effects on root architecture and root-to-shoot ratio in arable crops

  2023

  Frontiers in Plant Science · 245 Zitationen · DOI

  Plant root traits play a crucial role in resource acquisition and crop performance when soil nutrient availability is low. However, the respective trait responses are complex, particularly at the field scale, and poorly understood due to difficulties in root phenotyping monitoring, inaccurate sampling, and environmental conditions. Here, we conducted a systematic review and meta-analysis of 50 field studies to identify the effects of nitrogen (N), phosphorous (P), or potassium (K) deficiencies on the root systems of common crops. Root length and biomass were generally reduced, while root length per shoot biomass was enhanced under N and P deficiency. Root length decreased by 9% under N deficiency and by 14% under P deficiency, while root biomass was reduced by 7% in N-deficient and by 25% in P-deficient soils. Root length per shoot biomass increased by 33% in N deficient and 51% in P deficient soils. The root-to-shoot ratio was often enhanced (44%) under N-poor conditions, but no consistent response of the root-to-shoot ratio to P-deficiency was found. Only a few K-deficiency studies suited our approach and, in those cases, no differences in morphological traits were reported. We encountered the following drawbacks when performing this analysis: limited number of root traits investigated at field scale, differences in the timing and severity of nutrient deficiencies, missing data (e.g., soil nutrient status and time of stress), and the impact of other conditions in the field. Nevertheless, our analysis indicates that, in general, nutrient deficiencies increased the root-length-to-shoot-biomass ratios of crops, with impacts decreasing in the order deficient P > deficient N > deficient K. Our review resolved inconsistencies that were often found in the individual field experiments, and led to a better understanding of the physiological mechanisms underlying root plasticity in fields with low nutrient availability.

• Biochar Affected by Composting with Farmyard Manure

  2012

  Journal of Environmental Quality · 181 Zitationen · DOI

  Biochar applications to soils can improve soil fertility by increasing the soil's cation exchange capacity (CEC) and nutrient retention. Because biochar amendment may occur with the applications of organic fertilizers, we tested to which extent composting with farmyard manure increases CEC and nutrient content of charcoal and gasification coke. Both types of biochar absorbed leachate generated during the composting process. As a result, the moisture content of gasification coke increased from 0.02 to 0.94 g g, and that of charcoal increased from 0.03 to 0.52 g g. With the leachate, the chars absorbed organic matter and nutrients, increasing contents of water-extractable organic carbon (gasification coke: from 0.09 to 7.00 g kg; charcoal: from 0.03 to 3.52 g kg), total soluble nitrogen (gasification coke: from not detected to 705.5 mg kg; charcoal: from 3.2 to 377.2 mg kg), plant-available phosphorus (gasification coke: from 351 to 635 mg kg; charcoal: from 44 to 190 mg kg), and plant-available potassium (gasification coke: from 6.0 to 15.3 g kg; charcoal: from 0.6 to 8.5 g kg). The potential CEC increased from 22.4 to 88.6 mmol kg for the gasification coke and from 20.8 to 39.0 mmol kg for the charcoal. There were little if any changes in the contents and patterns of benzene polycarboxylic acids of the biochars, suggesting that degradation of black carbon during the composting process was negligible. The surface area of the biochars declined during the composting process due to the clogging of micropores by sorbed compost-derived materials. Interactions with composting substrate thus enhance the nutrient loads but alter the surface properties of biochars.

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