Precrop functional group identity affects yield of winter barley but less so high carbon amendments in a mesocosm experiment

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

Nitrate leaching is a pressing environmental problem in intensive agriculture. Especially after the crop harvest, leaching risk is greatest due to decomposing plant residues, and low plant nutrient uptake and evapotranspiration. The specific crop also matters: grain legumes and canola commonly result in more leftover N than the following winter crop can take up before spring. Addition of a high carbon amendment (HCA) could potentially immobilize N after harvest. We set up a 2-year mesocosm experiment to test the effects of N fertilization (40 or 160 kg N/ha), HCA addition (no HCA, wheat straw, or sawdust), and precrop plant functional group identity on winter barley yield and soil C/N ratio. Four spring precrops were sown before winter barley (white lupine, faba bean, spring canola, spring barley), which were selected based on a functional group approach (colonization by arbuscular mycorrhizal fungi [AMF] and/or N2-fixing bacteria). We also measured a subset of faba bean and spring barley for leaching over winter after harvest. As expected, N fertilization had the largest effect on winter barley yield, but precrop functional identity also significantly affected the outcome. The non-AMF precrops white lupine and canola had on average a positive effect on yield compared to the AMF precrops spring barley and faba bean under high N (23% increase). Under low N, we found only a small precrop effect. Sawdust significantly reduced the yield compared to the control or wheat straw under either N level. HCAs reduced nitrate leaching over winter, but only when faba bean was sown as a precrop. In our setup, short-term immobilization of N by HCA addition after harvest seems difficult to achieve. However, other effects such as an increase in SOM or nutrient retention could play a positive role in the long term. Contrary to the commonly found positive effect of AMF colonization, winter barley showed a greater yield when it followed a non-AMF precrop under high fertilization. This could be due to shifts of the agricultural AMF community toward parasitism.

OriginalspracheEnglisch
Aufsatznummer912
ZeitschriftFrontiers in Plant Science
Jahrgang9
Anzahl der Seiten12
DOIs
PublikationsstatusErschienen - 03.07.2018

Bibliographische Notiz

Funding Information:
This research was funded by the Federal Ministry of Education and Research (BMBF) initiative ‘BonaRes—Soil as a sustainable resource for the bioeconomy’ through the project INPLAMINT. We thank Thomas Niemeyer for construction of the leachate setup and other technical support, Justin Raeder, Benjamin Delory, Rafael Weidlich, Emanuela Weidlich, and the student helpers Phong Hong, Farida Samad-zada, Arthur César Coares, Douglas Henrique (all four funded by the DAAD RISE or AIESTE programs), Hannes Eggerts and Isabel Rosen for help with the field work and sample processing. We also thank Steffen Rothardt and Henning Kage of the CAU Kiel for supplying the soil and HCAs, and Saatzucht Breun, NPZ, Nordsaat Saatzucht, and Feldsaaten Freudenberger for supplying the seeds free of charge.

Funding Information:
This research was funded by the Federal Ministry of Education and Research (BMBF) initiative ‘BonaRes—Soil as a sustainable resource for the bioeconomy’ through the project INPLAMINT.

Publisher Copyright:
© 2018 van Duijnen, Roy, Härdtle and Temperton.

Zugehörige Projekte

  • INPLAMINT - Erhöhung der landwirtschaftlichen Nährstoffnutzungseffizienz durch Optimierung von Pflanze-Boden-Mikroorganismen-Wechselwirkungen, Teilprojekt H

    Projekt: Forschung

  • INPLAMINT II - Erhöhung der landwirtschaftichen Nährstoffnutzungseffizienz durch Optimierung von Pflanze-Boden-Mikroorganismen-Wechselwirkungen (Teilprojekt H)

    Projekt: Forschung

Dokumente

DOI

Zuletzt angesehen

Publikationen

  1. The effectiveness of nudging
  2. Front in the mouth, front in the word
  3. Minimum return guarantees, investment caps, and investment flexibility
  4. Logik
  5. Open Access und Open Educational Resources
  6. Linking socio-technical transition studies and organisational change management
  7. Absolute and relative maximum strength measures show differences in their correlations with sprint and jump performances in trained youth soccer players
  8. Fettflecken untersuchen mit Graphical Analysis
  9. Learning in participatory environmental governance – its antecedents and effects. Findings from a case survey meta-analysis
  10. Synthesis and future research directions linking tree diversity to growth, survival, and damage in a global network of tree diversity experiments
  11. Assembly history modulates vertical root distribution in a grassland experiment
  12. How Do AI Educators Use Open Educational Resources? A Cross-Sectoral Case Study on OER for AI Education
  13. Credit constraints, endogenous innovations, and price setting in international trade
  14. How selective are real wage cuts?
  15. Knowledge acquisition and development in sustainability-oriented small and medium-sized enterprises
  16. From Claiming to Creating Value
  17. Robust Decoupling Control of Contact Forces in Robotic Manipulation
  18. Towards a Relational Materialism
  19. Structural ambidexterity, transition processes, and integration trade‐offs: a longitudinal study of failed exploration
  20. Experimental and numerical investigation of residual stresses in laser shock peened AA2198
  21. Skill learning as a concept in life-span developmental psychology