| Titles |
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English :
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Remediation role of humic acid on faba bean plants grown on sandy lead polluted soil
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Arabic :
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الدور العلاجى لحامض الهيوميك على نباتات الفول النامية فى أرض رمليةملوثة بالرصاص
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| Abstract |
A greenhouse experiment was set up using a lead polluted sandy soil as growth media for faba bean (Vicia faba) variety Giza 2 grown for 90 days as an indicator plant to investigate the role of humic acid in attenuating the harmful effects of Pb on faba bean plants. Plastic pots were packed with 4 Kgs. of the soil. The Pb was added at rates of 0, 50 and 100 mgKg-1. Humic acid (H.A) was added at rates of 0, 750 and 1500 mgKg-1 soil. During growth season the soil samples were taken from rhizosphere area at periods of 15, 30, 60 and 90 days from cultivation to evaluate the level of Pb, the soil CO2 evolved and soil pH under rhizosphere conditions.
Results obtained could be summarized as follows:
The dry matter yield of bean plants was significantly but negatively affected with increasing the rate of Pb addition, whereas the remediative effect of humic acid increased with increasing the rate of H.A. addition.
Increasing the rate of Pb-addition resulted in a significant increase in Pb-concentration in bean plants while an increase in application rates of humic acid yielded a decrease in Pb-concentration of bean plants.
The N-concentration and uptake by bean plants were significantly decreased with increasing Pb-addition. On contrary, they were significantly increased as humic acid increased.
There was a significant positive relations for P and K-concentration and uptake by bean plants with humic acid. But they were passively affected by augmenting the rate of Pb-additions.
Soil available-Pb was significantly affected with increasing Pb-addition but it significantly reduced by increasing rate of humic acid and incubation periods.
The number and dry weight of nodules for bean plants were significantly increased with increasing humic acid application. On the other hand, they decreased with increasing Pb-addition.
CO2 evolved from the soil increased markedly with increasing the growth periods of bean plants up to 60 days then decreased when the growth periods increased up to 90 days at different rates of Pb-addition. The same trend was obtained with humic acid.
Increasing each of the rate of humic acid and Pb-addition as well as incubation periods reduced markedly the soil pH
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| Publication year |
2003
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| Pages |
1811-1826
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| Availability location |
Soils, Water and Environment Research Institute, ARC
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| Availability number |
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| Organization Name |
Soil, Water and Environment Research Institute (SWERI)
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| Country |
Egypt
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| City |
Benha
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| Publisher |
Name:
Faculty Of Agriculture, Moshtohor, Benha University
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| serial title |
Annals Of Agricultural Science, Moshtohor
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| ISSN |
1110-0419
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| Volume |
41
. 4
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| Department |
Soil Physics and Chemistry
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| Author(s) from ARC |
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| Agris Categories |
Soil chemistry and physics
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AGROVOC
TERMS |
Humic acids.
Lead.
Pollution control.
Rhizobium.
Sandy soils.
Vicia faba.
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| Publication Type |
Journal
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