Skip to main content

Recycling coffee and tea wastes to increase plant available Fe in alkaline soils

Abstract

Coffee beans and tea leaves contain large amounts of potentially metal-chelating substances which could remain in the wastes after extraction by hot water. The following two experiments have been carried out: a) an incubation experiment with the objective of verify whether coffee grounds and green tea wastes could be used as an Fe chelating agent to increase Fe availability to plants in the soil; b) a pot experiment to verify the effect of those composts on the Fe content of the edible part of vegetables. Japanese leaf radish (Raphanus raphanus sp), whose the leaves are the edible part, was chosen as test plant. Calcareous subsoil (shell fossil soil) with original pH 9.3 and a B horizon of Andisol (Typic melanudand) with pH adjusted to 7.7 were used. For the incubation experiment, the treatments included of the direct addition of Fe at rates of 0 (control), 10, 20 and 40 μg g−1 dry soil as ferrous sulfate (FS); coffee waste compost (CWC) and tea waste compost (TWC). Both composts contained approximately 40 g Fe kg−1 dry mass. Thus, the total amounts of CWC and TWC added were of 0, 0.25, 0.5 and 1.0 mg g−1 soil. Considering a soil density of 1 g cm−3 and 10 cm of plow layer, the total amounts of compost applied were of 0, 0.25, 0.5 and 1.0 ton ha−1. Soil samples were collected after 30 and 60 days of incubation and then analyzed for plant available Fe. For the pot experiment, the doses of 0 (control) and 1 mg g−1 soil of CWC or TWC were used to grow radish. Plants were harvested after 60 days. For samples incubated for 30 days, the CWC and TWC treatments led to the largest increase in the ammonium bicarbonate diethylene triamine pentaacetic acid (AB-DTPA) extractable Fe levels of both soils (P < 0.05). After 60 days of incubation the amounts of AB-DTPA-extractable Fe in soil samples treated with both composts were always higher than in those treated with FS alone. For both soils, the application of 40 μg Fe g−1 dry soil as CWC or TWC enhanced significantly (P < 0.05) the total Fe content of radish shoots compared to the control. We concluded that it has been possible to increase the plant-available Fe in neutral to alkaline soils using coffee grounds and tea leaf wastes composted with FS. However, more research on the effectiveness in field conditions are necessary.

This is a preview of subscription content, access via your institution.

Fig. 1
Fig. 2

References

  1. Al-Mustafa WA, Abdallah AE, Falatah AM (2001) Assessment of five extractants for their ability to predict iron uptake and response of sorghum growth in calcareous soils. Commun Soil Sci Plant Anal 32:907–919

    Article  CAS  Google Scholar 

  2. Andjelković M, Camp JV, De Meulenaer B, Depaemelaere G, Socaciu C, Verloo M, Verhe R (2006) Iron-chelation properties of phenolic acids bearing catechol and galloyl groups. J Agric Food Chem 98:23–31

    Google Scholar 

  3. Basar H (2005) Methods for estimating soil iron availability to chlorotic peach trees. Commun Soil Sci Plant Anal 36:1187–1198

    Article  CAS  Google Scholar 

  4. Brown JE, Khodr H, Hider RC, Rice-Evans CA (1998) Structural dependence of flavonoid interactions with Cu2+ ions: implications for their antioxidant properties. Biochem J 330:1173–1178

    PubMed  CAS  Google Scholar 

  5. Graham HN (1992) Green tea composition, consumption and polyphenol chemistry. Prev Med 21:334–350

    PubMed  Article  CAS  Google Scholar 

  6. Holmgren GGS (1967) A rapid citrate-dithionite extractable iron procedure. Soil Sci Soc Am Proc 31:210–211

    CAS  Article  Google Scholar 

  7. Howitz GW (1980) Official methods of analysis of the Association of Official Analytical Chemists, 13th edn. Association of Official Analytical Chemists, Washington, DC, p 1018

    Google Scholar 

  8. McKeague JA (1967) An evaluation of 0.1 M pyrophosphate and pyrophosphate-dithionite in comparison with oxalate as extractants of the accumulation products in podzols and some other soils. Can J Soil Sci 47:95–99

    CAS  Article  Google Scholar 

  9. McKeague JA (1976) Manual on soil sampling and methods of analysis. Soil Research Institute, Agriculture Canada, Ottawa, p 163

    Google Scholar 

  10. Silva MA, Nebra SA, Silva MJM, Sanchez CG (1998) The use of biomass residues in the Brazilian soluble coffee industry. Biomass Bioenergy 14:457–467

    Article  CAS  Google Scholar 

  11. Soltanpour PN, Schwab AP (1977) A new soil test for simultaneous extraction of macro and micronutrients in alkaline soils. Commun Soil Sci Plant Anal 8:195–207

    CAS  Google Scholar 

  12. Utomo HD, Hunter KA (2006) Adsorption of divalent copper, zinc, cadmium and lead ions from aqueous solution by waste tea and coffee adsorbents. Environ Technol 27(1):25–32

    CAS  Article  Google Scholar 

  13. Yang CJ, Yang IY, Oh DH, Bae IH, Cho SG, Kong IG, Uuganbayar D, Nou IS, Choi KS (2003) Effect of green tea by-products on performance and body composition in broiler chicks. Asian-Australas J Anim Sci 16:867–872

    CAS  Google Scholar 

Download references

Author information

Affiliations

Authors

Corresponding author

Correspondence to C. K. Morikawa.

Additional information

Responsible Editor: Hans Lambers.

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Morikawa, C.K., Saigusa, M. Recycling coffee and tea wastes to increase plant available Fe in alkaline soils. Plant Soil 304, 249–255 (2008). https://doi.org/10.1007/s11104-008-9544-1

Download citation

Keywords

  • Alkaline soils
  • Coffee ground
  • Plant available Fe
  • Tea leaves
  • Waste