Assessment of seedling establishment and growth performance of Leucaena leucocephala (Lam.) De Wit., Senna siamea (Lam.) H.S. Irwin & Barneby and Eucalyptus grandis W.Hill ex Maid. in amended and untreated pyrite and copper tailings
2014 (English)In: Journal of Biosciences and Medicines, ISSN 2327-5081, Vol. 2, 33-50 p.Article in journal (Refereed) Published
Growth and survival performance of Leucaena leucocephala (Lam.) De Wit., Senna siamea Lam. andEucalyptus grandis W. Hill ex Maid. in amended and untreated pyrite and copper tailings wereevaluated under field conditions. The physico-chemical characteristics of the pyrite soil and tailingswere determined. Growth in height, basal diameter and later dbh, relative growth rate due toheight (RGRh) and basal diameter (RGRd) and survival were determined every after six months. Asplit block experimental design was used and the data collected were analyzed using a statisticalpackage R, with an additional package lme4. Tailings and pyrite soils had extremely low pH, poornutritional status, low organic matter content and elevated concentrations of available heavymetals as compared to the unpolluted soils and treated pyrite soil and copper tailings. Growthperformance was extremely poor on the untreated pyrite soil and copper tailings for all the speciesbut significantly enhanced by the application of compost and limestone. Treatment had a significanteffect on all parameters at all sites. Eucalyptus grandis displayed a higher potential ofphytomass accumulation than Leucaena leucocephala and Senna siamea. Even though Leucaenaleucocephala grew fastest reaching reproductive maturity in 7 months after planting, relative growth rates of the three species were not significantly different at all sites. The three species canbe used for phytostabilisation of the tailings at Kilembe tailings dam sites (KTDS) after treatmentwhile at Low polluted pyrite trail site (LPPTS) and Highly polluted pyrite trail sites (HPPTS) Sennasiamea is more suitable as Eucalyptus grandis and Leucaena leucocephala are susceptible to attacks by Syncerus caffer (Buffalos) and Kobus kob thomasi (Uganda Kob).
Place, publisher, year, edition, pages
2014. Vol. 2, 33-50 p.
seedling establishment, growth performance, pyrite, phytostabilization, tailings, QECA
IdentifiersURN: urn:nbn:se:uu:diva-220941DOI: 10.4236/jbm.2014.21005OAI: oai:DiVA.org:uu-220941DiVA: diva2:707353
FunderSida - Swedish International Development Cooperation Agency