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Assessing long term effects of compost fertilization on soil fertility and nitrogen mineralization rate

Reimer, Marie; Kopp, Clara; Hartmann, Tobias Edward; Zimmermann, Heidi; Ruser, Reiner; Schulz, Rudolf; Müller, Torsten and Möller, Kurt (2023) Assessing long term effects of compost fertilization on soil fertility and nitrogen mineralization rate. Journal of Plant Nutrition and Soil Science, online, pp. 1-17.

[thumbnail of Journal of Plant Nutrition and Soil Science - 2023 - Reimer - Assessing long term effects of compost fertilization on soil.pdf] PDF - Published Version - English
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Document available online at: https://onlinelibrary.wiley.com/doi/full/10.1002/jpln.202200270


Background: Fertilization with organic waste compost can close the nutrient cycles between urban and rural environments. However, its effect on yield and soil fertility must be investigated.
Aim: This study investigated the long-term effect of compost on soil nutrient and potentially toxic elements (PTEs) concentration, nutrient budgets, and nitrogen (N) mineralization and efficiency.
Methods: After 21 years of annual compost application (100/400 kg N ha–1 year–1 [100BC/400BC]) alone and combined with mineral fertilization, soil was analyzed for pH, organic carbon (SOC), nutrient (total N and P, Nmin, extractable CAL-P, CAL-K, and Mg), and PTE (Cu, Ni, Zn) concentrations. Yields were recorded and nutrient/PTE budgets and apparent netmineralization (ANM, only 2019) were calculated.
Results:Nefficiency was the highest in maize and formineral fertilization. Compost application led to lower N efficiencies, but increased ANM, SOC, pH, and soil N, and surpluses of N, P, and all PTEs. Higher PTE concentrations were only found in 400BC for Cu. Nutrient budgets correlatedwith soil nutrient concentration. A surplus of 16.1 kg P ha–1 year–1 and 19.5 kgKha–1 year–1 resulted in 1mg kg–1 increase in CAL-P and CAL-K over 21 years.
Conclusion: Compost application supplies nutrients to crops with a minor risk of soilaccumulation of PTEs. However, the nutrient stoichiometry provided by compost does not match crop offtakes causing imbalances. Synchronization of compost N mineralization and plant N demand does not match and limits the yield effect. In winter wheat only 65–70% of Nmineralization occurred during the growth period.

EPrint Type:Journal paper
Keywords:nitrogen efficiency, nutrient budget, nutrient recycling, phosphorus, potassium, potentially toxic elements, soil organic carbon
Agrovoc keywords:
nutrient balance
soil organic carbon
Subjects: Crop husbandry > Composting and manuring
Soil > Nutrient turnover
Farming Systems > Farm nutrient management
Research affiliation: European Union > Horizon 2020 > RELACS
Germany > University of Hohenheim
Horizon Europe or H2020 Grant Agreement Number:773431
Deposited By: Reimer, Marie
ID Code:45430
Deposited On:15 Feb 2023 07:58
Last Modified:15 Feb 2023 07:58
Document Language:English
Refereed:Peer-reviewed and accepted

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