Salam, Abdul Kadir and Sriyani, Nanik and Heradilla, Mutia (1997) Solubilities of Heavy Metals in Lead Contaminated Root-Zones of Tropical Weeds. Journal of Tropical Soils, 2 (4). pp. 117-122. ISSN 0852-257X

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Abstract

Some tropical weeds have been suggested to greatly affect their root-zones to better extract nutrients from soils. The solubilities of some heavy metals in soil under some tropical weeds were studied. Soil sample was spiked with Pb and/or treated with lime before weeds comprising pigweed (Amaranthus spinosus), green kyllinga (Cyperus kyllingia) and alang-alang (lmperata cylindrica) and also amaranth (Amaranthus tricolour) were planted and allowed to grow for 4 weeks. The soil under alang-alang showed higher pH values than those under pigweed, green kyllinga, and amaranth while those under pigweed showed the lowest pH values. The soils treated with lime also showed higher pH values. The solubilities of Fe, Zn. Mn, and Pb were generally lower in soils treated with lime than in soils not treated with lime. With some exception, the solubilities of these metals were also lower in soils under pigweed than those under green kyllinga, alang-alang, and amaranth. On the other hand, soils under amaranth showed significantly higher Mn solubilities than those under pigweed, green kyllinga, or alang-alang. Addition of 20 mg Pb kg-1 increased the solubility of Pb to about 6 to 8 mg kg-1 in soils under pigweed, green kyllinga, and amaranth and to about 1 mg kg-1 in soils under alang-alang. Lime and pH neutralization by alang-alang greatly lowered the solubility of Pb.

Item Type: Article
Uncontrolled Keywords: Amaranth, Heavy Metals, Lead, Lime, Tropical Weeds
Subjects: S Agriculture > S Agriculture (General)
Divisions: Fakultas Pertanian (FP) > Prodi Ilmu Tanah
Depositing User: Abdul Kadir Salam
Date Deposited: 26 Apr 2018 03:50
Last Modified: 26 Apr 2018 03:50
URI: http://repository.lppm.unila.ac.id/id/eprint/6362

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