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| Effects of Different Specification Rhizosphere Regulation Medium Blocks on Corn Growth and Cd Uptake |
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| KeyWord:rhizosphere regulation; different specification; medium block; corn; Cd |
| Author Name | Affiliation | | CHEN Xi | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences
College of Ethnic Arts of Inner Mongolia Normal University | | ZUO Qiang | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences | | ZOU Guo-yuan | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences | | ZHANG Lin | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences | | GU Jia-lin | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences | | GONG Yan-gang | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences | | WANG Jia-chen | Institute of Plant Nutrition and Resources, Beijing Academy of Agriculture and Forestry Sciences |
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| Abstract: |
| Contaminated soil remediation is always a highly concerned problem. Generally, the present remediation methods are physical, chemical, and biological, but there are some confined factors for these methods above, so exploring new methods or techniques seems very important. The aim was to research the effects of different specification rhizosphere regulation medium blocks on corn growth and Cd uptake，and conduct the attempt of using medium block rhizosphere regulation to resist heavy metals to provide technological and practical references for development of rhizosphere regulation for farmland of heavy metal polluted. In this test, a pot experiment was conducted with 5 treatments of 4 medium block specifications（Diameter × thicknesses were 50 mm×20 mm, 35 mm×20 mm, 50 mm×25 mm and 65 mm×20 mm respectively and weights were 40.0 g, 19.6 g, 50.0 g and 67.6 g, respectively） and 1 washing out medium block when corn seedlings were transplanted in the 5.19 mg·kg-1 of Cd in soil. The results showed that comparing with other treatments, treatment 5 improved corn shoot growth significantly. The total root dry weights, root dry weights in the inner and outside medium block of treatment 5 were also obviously higher than those of treatments 1~4. Compared with treatment 1（CK）, the Cd contents in shoots and roots were decreased from 11.5% to 46.3% and from 1.19% to 56.0% in the all treatments, respectively, with significant decrease in shoot only in treatment 5. The experiment results also showed that rhizosphere regulation needs suitable regulative space. This current research has verified the technological practicability of heavy metal rhizosphere regulation established by our previous work and practical application maneuverability. |
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