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Implications of rhizospheric heavy metals and nutrients for the growth of alfalfa in sludge amended soil.
Chemosphere. 2004 Sep; 56(10):957-65.C

Abstract

Rhizospheric distribution of nutrients and heavy metals in sludge amended soil was investigated using the rhizobag technique to give an indication of the release of metals from wastewater sludge. DTPA-extractable Zn, Cd, Ni and Mn, and available P, K and NH4+-N in the rhizosphere were markedly depleted when soil was amended with sludge. There was no conspicuous depletion or accumulation of DTPA-extractable Cu in the rhizosphere when the soil was amended with sewage sludge but DTPA-extractable Fe accumulated in the rhizosphere when the soil was amended with increasing amounts of sludge. The pH value in the rhizosphere increased with distance from the roots when soil was amended with larger amounts of sludge. The exchangeable fraction of Cu in the rhizosphere was depleted whether or not the soil was treated with sludge. Carbonate, oxide, organic and residual fractions of Cu and Zn were depleted in the rhizosphere at a distance of 0-2 mm from the roots when soil was amended with 50% sludge. Application of sewage sludge had a positive effect on alfalfa growth. With an increase in sludge amounts, the concentrations of Fe, Cu and Zn in alfalfa shoots did not change. Soil amendments with less than 25% sludge did not increase the availability or mobility of heavy metals. The depletion in rhizospheric DTPA-extractable Zn, Cd and Ni indicates that with the sole exception of Cu, release of metals from sludge amended soil was very limited.

Authors+Show Affiliations

Department of Plant Nutrition, China Agricultural University, Beijing 100094, PR China.No affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15268962

Citation

Su, D C., et al. "Implications of Rhizospheric Heavy Metals and Nutrients for the Growth of Alfalfa in Sludge Amended Soil." Chemosphere, vol. 56, no. 10, 2004, pp. 957-65.
Su DC, Wong JW, Jagadeesan H. Implications of rhizospheric heavy metals and nutrients for the growth of alfalfa in sludge amended soil. Chemosphere. 2004;56(10):957-65.
Su, D. C., Wong, J. W., & Jagadeesan, H. (2004). Implications of rhizospheric heavy metals and nutrients for the growth of alfalfa in sludge amended soil. Chemosphere, 56(10), 957-65.
Su DC, Wong JW, Jagadeesan H. Implications of Rhizospheric Heavy Metals and Nutrients for the Growth of Alfalfa in Sludge Amended Soil. Chemosphere. 2004;56(10):957-65. PubMed PMID: 15268962.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Implications of rhizospheric heavy metals and nutrients for the growth of alfalfa in sludge amended soil. AU - Su,D C, AU - Wong,J W C, AU - Jagadeesan,H, PY - 2003/07/30/received PY - 2004/04/23/revised PY - 2004/05/03/accepted PY - 2004/7/23/pubmed PY - 2004/12/16/medline PY - 2004/7/23/entrez SP - 957 EP - 65 JF - Chemosphere JO - Chemosphere VL - 56 IS - 10 N2 - Rhizospheric distribution of nutrients and heavy metals in sludge amended soil was investigated using the rhizobag technique to give an indication of the release of metals from wastewater sludge. DTPA-extractable Zn, Cd, Ni and Mn, and available P, K and NH4+-N in the rhizosphere were markedly depleted when soil was amended with sludge. There was no conspicuous depletion or accumulation of DTPA-extractable Cu in the rhizosphere when the soil was amended with sewage sludge but DTPA-extractable Fe accumulated in the rhizosphere when the soil was amended with increasing amounts of sludge. The pH value in the rhizosphere increased with distance from the roots when soil was amended with larger amounts of sludge. The exchangeable fraction of Cu in the rhizosphere was depleted whether or not the soil was treated with sludge. Carbonate, oxide, organic and residual fractions of Cu and Zn were depleted in the rhizosphere at a distance of 0-2 mm from the roots when soil was amended with 50% sludge. Application of sewage sludge had a positive effect on alfalfa growth. With an increase in sludge amounts, the concentrations of Fe, Cu and Zn in alfalfa shoots did not change. Soil amendments with less than 25% sludge did not increase the availability or mobility of heavy metals. The depletion in rhizospheric DTPA-extractable Zn, Cd and Ni indicates that with the sole exception of Cu, release of metals from sludge amended soil was very limited. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/15268962/Implications_of_rhizospheric_heavy_metals_and_nutrients_for_the_growth_of_alfalfa_in_sludge_amended_soil_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(04)00411-4 DB - PRIME DP - Unbound Medicine ER -