Sequential extraction of Cu and Zn from soil amended with bio-compost for 12 years: risk of leaching

Najar, Husam Al; Dohle, David; Kurz, H.; Breuer, Jörn; Müller, Torsten

doi:10.1504/ijewm.2016.081834

Cited by 2 publications

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“…Investigations by Al‐Najar et al. (2016) suggest that Zn is mostly present in its bioavailable organic form while Cu is mostly in its unavailable inorganic form in soils amended with compost. This could explain the discrepancies between the effects of compost application on Cu and Zn uptake.…”

Section: Discussionmentioning

confidence: 99%

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

Reimer

Kopp

Hartmann

et al. 2023

J. Plant Nutr. Soil Sci.

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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 net mineralization (ANM, only 2019) were calculated. Results N efficiency was the highest in maize and for mineral 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 correlated with soil nutrient concentration. A surplus of 16.1 kg P ha–1 year–1 and 19.5 kg K ha–1 year–1 resulted in 1 mg kg–1 increase in CAL‐P and CAL‐K over 21 years. Conclusion Compost application supplies nutrients to crops with a minor risk of soil‐accumulation 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 N mineralization occurred during the growth period.

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Section: Discussionmentioning

confidence: 99%

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

Reimer

Kopp

Hartmann

et al. 2023

J. Plant Nutr. Soil Sci.

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Identification and quantification of phosphate turnover indicators after long-term compost application – long-term and single season effects

Wanke,

Nkebiwe,

Günther

et al. 2024

Plant Soil

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Background and aims Soil organic phosphorus (Porg) is of interest for plant nutrition because it can comprise between 20 and 80% of total soil phosphate (P). This study aims to examine the effect of compost application on soil phosphatases and microbial biomass, which influence the P turnover and, furthermore, to examine the speciation of Porg. Methods Soil from a long-term field experiment (since 1997) which compares compost application with inorganic fertilization was analyzed for calcium-acetate-lactate extractable P (CAL-P), Olsen-P, acid (Acid-Pase) and alkaline (Alk-Pase) phosphatase activity and microbial biomass P. Porg speciation was additionally analyzed with liquid-state 31P nuclear magnetic resonance spectroscopy (31P-NMR). Results We found a significant increasing long-term effect of high compost application (equivalent to 400 kg ha−1 N (400)) on Acid-Pase (45%) and Alk-Pase (58%). After compost application, Acid-Pase increased by 41% in treatment 400 (3 days after compost application (DAA)). The 31P-NMR analysis showed a significant increase of inorganic orthophosphate (55%) after high compost application. Furthermore, the total phosphomonoester region was significantly decreased in the treatment 400 (8%). Conclusions We demonstrated that long-term compost application increases phosphatase activity which plays a key role in the mineralization of soil Porg. In particular, the decrease of the concentration of Porg species in the phosphomonoester region in the treatment 400 with high compost application highlights that an increased turnover affects this soil P pool and may provide P to plants. This knowledge provides a better understanding of how the P cycle responds to long-term compost fertilization.

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Sequential extraction of Cu and Zn from soil amended with bio-compost for 12 years: risk of leaching

Cited by 2 publications

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

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

Identification and quantification of phosphate turnover indicators after long-term compost application – long-term and single season effects

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