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Possibility of Planting Mulberry in Mining Polluted Farmland

Author: TanYongBi
Tutor: ChenTongBin；LiZhiGang
School: Guangxi University
Course: Botany
Keywords: Mulberry Mining pollution Crop Feasibility
CLC: X53
Type: Master's thesis
Year: 2008
Downloads: 267
Quote: 4
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Abstract


To study mining pollution farmland sericulture mode feasibility, carried out in the the Huanjiang mining contaminated areas, the Sandinista soil pollution characteristics, mulberry leaf heavy metal content and quality of investigations, focusing on the to study pollution Sandinista soil and leaf heavy metal content the relationship soil heavy metal content of mulberry leaf quality and pollution mulberry biological toxicity. The main findings are as follows: 1. The Huanjiang pollution Sang (subject to flood carrying tailings) of heavy metals, acid serious pollution, the pollution Sang soil Pb, Zn, As content control Sandinista (pollution near the Sandinista were not flooded) 17.2,3.8,3.5 times, lead, zinc, arsenic levels exceeding rates were 61.7%, 58.8%, 47.1% (soil environmental quality standards, \extreme acidification of soil, although preliminary acidic repair, but there are nearly one-third of the pollution Sang strongly acidic soils (pH <4.5). 2. Mulberry strong acid resistance, can grow in strongly acidic soil; mulberry is also more resistant to soil lead, zinc, arsenic compound pollution, lead, zinc, arsenic levels were of up to 734,1194,53 mg / kg of contaminated soil on growth and showed no appearance by stress phenomena. Contamination old mulberry Pb, Zn, As and soil heavy metal content accordingly significantly related; contaminated mulberry Pb, Zn were significantly higher than the control mulberry leaf, pollution content of mulberry leaves and control mulberry As no significant difference; contaminated mulberry leaves quite Pb, Zn, As enrichment ordinary plant. 4. Mulberry leaves, Pb, Zn, As the accumulated amount of the increase of the mulberry leaf growth cycle increases; pollution Sandinista old mulberry leaves (5-8 leaf bits) Pb, Zn, As and tender mulberry leaves (4 corresponding heavy metal content in the leaf bits or more) were significantly related; Sandinista in the control the old mulberry content of Zn, As, and the tender mulberry leaves in the corresponding heavy metal content were significantly associated, while Pb more easily tender mulberry leaves enrichment. Pollution Sandinista quality of mulberry leaves no destruction by pollutants, contamination old mulberry leaf protein content but significantly higher than the old mulberry leaves uncontaminated. Contaminated mulberry leaves soluble protein content increased with mulberry leaf heavy metal content is not relevant, and negatively correlated with soil pH. Soil acidity affects mulberry plants of acidity, acid environment conducive to the increase in the content of soluble protein. 6. Biological toxicity of contaminated mulberry leaves heavy metal content of the silkworm. Silkworm food under the rate of pollution mulberry leaves and control mulberry, digestibility no statistically significant difference; the silkworm cocooning situation contaminated mulberry leaves to feed and control mulberry leaves performance on cocoon number, the number of under cocoon significant differences, but on cocoon weight and did not reach a significant difference, the cocoon cocoon layer there was no significant difference in the rate. Contaminated mulberry leaves to feed the silkworms silk heavy metal content of the ecological textile technical requirements (GBT18885-2002) standard limit; contaminated mulberry leaves to feed silkworms silkworm fecal Pb, Zn, As content was significantly higher than the control silkworm fecal mulberry leaves to feed the silkworms, but far lower than the limit of heavy metals in agricultural sludge pollutant control standards (GB4284-84) \\8 Mulberry resistant soil heavy metals toxic mulberry leaves heavy metal toxicity and biological, sericulture products of ecological security, sericulture, high economic efficiency, so sericulture mining pollution rational use of arable land mode.

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Soil Contamination and Control
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