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The Soil Heavy Metal Information Accurate Collection and Evaluation about Lycium Barbarum Cultivation in Western China
Abstract : We selected two small sections of Lycium
Barbarum cropland at Nuomuhong Farm in the Qaidam basin,
western China: one had been farmed for only one year (original land),
and the other had been farmed for many years (farm land). We tested
surface soil samples for their content and distribution of six heavy
metals (Cd, Zn, Pb, Cu, As, and Cr). All six heavy metals appeared at
medium levels in samples from both sections of cropland. We conducted an
interpolation analysis and drew a spatial distribution map based on the
inverse distance weight (IDW) method. The distribution graph revealed a
relatively consistent distribution of the six heavy metals in soil
samples, a different gradation in the original land, and areas of higher
values in the farm land. These findings suggest that the soil had been
polluted. According to the Pollution-Free Food Standard and the Green
Food Standard, we calculated the integrate pollution index using the
Nemerow index method to check whether the levels met Pollution-Free food
Standard and Green Food Standards. The values were 0.5 and 0.7 (defined
as ‘clean’) in samples from the original land, but were 0.6
and 0.9 in samples from the farm land, which may be considered
excessive.
Cited literature [6 references]
https://hal.inria.fr/hal-01220930
Contributor : Hal Ifip <>
Submitted on : Tuesday, October 27, 2015 - 10:12:37 AM
Last modification on : Wednesday, January 17, 2018 - 10:43:35 AM
Long-term archiving on: : Thursday, January 28, 2016 - 10:36:02 AM
Contributor : Hal Ifip <>
Submitted on : Tuesday, October 27, 2015 - 10:12:37 AM
Last modification on : Wednesday, January 17, 2018 - 10:43:35 AM
Long-term archiving on: : Thursday, January 28, 2016 - 10:36:02 AM
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