EFFECT OF INOCULATION OF MAIZE BY ARBUSCLAR MYCORRHIZAL FUNGI ON THE AVAILABILITY OF NUTRIENTS AND BIOREMEDIATION OF HEAVY METALS IN NEWLY RECLAIMED SOILS | ||
| Journal of Soil Sciences and Agricultural Engineering | ||
| Article 5, Volume 30, Issue 2, February 2005, Pages 1233-1247 PDF (200.69 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jssae.2005.225978 | ||
| Authors | ||
| E. A. Koreish1; M. H. EI-Halfawy1; Hoda H. Abdel Azeim2; Noha M. Abdel-Hameid2 | ||
| 1Soil and Water Sciences Dept., Fac. of Agric., Alexandria University. | ||
| 2Desert Research CenterAI Mataria-Cairo. | ||
| Abstract | ||
| The objectives of the present study were to select the best management of sewage sludge and phosphorus fertlizer for maize (Zea mays L.) under mycorrhizal inoculation in newly reclaimed calcareous soil and to evaluate the role of mycorrhizal fungi in combination with sewage sludge and phosphorus fertilizer on maize growth and validate the reduction of heavy metals uptake by plants against the mycorrhizal infection. Field experiment was conducted in Maryuot research station (km 37 Alexandria - Cairo desert road) on a sandy clay loam soil. Four levels of sewage- sludge (0.0, 6.0, 12.0, and 18.0 ton ha1) and three rates of phosphorus fertilizer (0.0, 36, and 72 kg P205 h&1) were applied. Some plots inoculated with rriycorrhizal spores and others were without inoculation. Plant samples were coDected at harvest, shoot and root dry weight; as well, shoot, root and ear leaf phosphorus concentration and heavy metal (i.e. Zinc, Cadmium, Nickel and Lead) were determined. In addition, ear yield was determined at the end of season. Shoot dry weight (SDW) showed significant increase with mycorrhizal inoculation than un-inoculation treatments under all applications of sewage sludge and phosphorus fertilizer. Root dry weight (RDW) increased with all sludge and phosphorus treatments in either un-inoculated or inoculated treatments. Shoot Dry Matter (SDM) increased with increases of sludge and phosphorus appilcations in both inoculated and un-inoculated treatments. MD of SDM decreased with increasing sludge applications under the three phosphorus applications. Root Dry Matter (RDM) showed, in general an increase with increasing sludge and phosphorus applications in both inocutated and un-inoculated treatments. The maximum ear yield in un-inoculated and inoculated treatments was obtained with S1 (6.0 ton ha1 of sewage sludge) and P2 treatments (72.0 kg P205 ha1). Shoot-P concentration increased with increases of sludge or phosphorus treatments. In general, the maximum shoot-P concentration was obtained under S3 P2 treatments. Root-P concentration takes the same trend of shoot-P concentration over the control treatment. The maximum root-P concentration was obtained under S3 P2 treatments. ncreasing sludge application rates increased significantfy the shoot, root and ear leaf-Zn, Cd, Ni and Pb concentrations. Also, increase of P applications decreased concentrations of Zn ¡n shoot and ear leaf, while Cd concentration increased with P increases in inoculated treatments. Plants inoculated with AMF, have lower Zn, Cd, Ni and Pb concentrations in shoot and ear leaf but higher in root-Zn concentration. R/S ratio of Zn, Cd, Ni and Pb concertinos were higher in inoculated plants than in un-inoculated plants which means the ability of root tissues to accumulate Zn, Cd, Ni and Pb and consequently low Zn, Cd, Ni and Pb translocation from root to shoot and hence to maize grains. | ||
| Keywords | ||
| Sewage sludge; Arbuscular mycorrhiza; Heavy metals; Bioremediation | ||
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