| Effects of municipal sewage sludge on physiological properties of three varieties of maize in Lanzhou |
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| DOI：10.7606/j.issn.1000-7601.2013.01.25 |
| Key Words: sewage sludge Zea mays chlorophyll praline MDA |
| Author Name | Affiliation | | DAI Liang | College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization, Ministry of Education, Lanzhou, Gansu 730070, China | | REN Jun | College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization, Ministry of Education, Lanzhou, Gansu 730070, China | | TAO Ling | College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization, Ministry of Education, Lanzhou, Gansu 730070, China | | SONG Xiaosan | College of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, Gansu 730070, China
Engineering Research Center for Cold and Arid Regions Water Resource Comprehensive Utilization, Ministry of Education, Lanzhou, Gansu 730070, China |
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| Abstract: |
| The application of sewage sludge on agricultural soils is a promising disposal a
nd utilizable method to improve soil properties and increase plant productivity.
The experimental results showed that three varieties of maize（Fengshi 88, Shen
dan 16, and Fengshi 9713）could grow wel
l and the miaze biomass increased significantly after sewage sludge application
(the dry weight ratio of sludge to the mixed soil of 5%, 10%, 15%, 25%, 35%). Wi
th land application of sewage sludge, the total chlorophyll of three varieties o
f maize increased at first, and then decreased. The leaf proline content of thre
e varieties of maize showed a big increase after sewage sludge application compa
red with the control treatment, but a threshold value did not appear. The leaf M
DA content of three varieties of maize all increased. However, ‘Fengshi 88’ ha
d the largest increment, while ‘Shendan 16’ increased the least. Maiz
e hightened the protective enzyme activity and the content of adjusting osmotic
substance to alleviate the oxidative damage to membrane lipid by sludge. The con
tents of Pb, Cu, and Zn in the soil increased with the increase of sewage sludge
application, but not exceeding the standards of soil environmental quality for
Grade II (GB15618-1995). The contents of Pb, Cu, and Zn in the soil had signific
antly positive correlation with the contents of proline and MDA in the leaves of
three varieties of maize. When sludge application rate was less than 25%, maize
showed strong adaptability and tolerance. |
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