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- Title
Effects of intercropping Sedum plumbizincicola and Apium graceolens on the soil chemical and microbiological properties under the contamination of zinc and cadmium from sewage sludge application.
- Authors
NAI Feng-jiao; WU Long-hua; LIU Hong-yan; REN Jing; LIU Wu-xing; LUO Yong-ming
- Abstract
Taking the vegetable soil with zinc- and cadmium contamination from a long-term sewage sludge application as the object, a pot experiment was conducted to study the remediation effect of Sedum plumbizincicola and Apium graceolens under continuous monoculture and intercropping. With the remediation time increased, both S. plumbizincicola and A. graceolens under monoculture grew poorly, but S. plumbizincicola under intercropping grew well. Under intercropping, the soil organic matter, total N, extractable N, and total P contents decreased significantly while the soil extractable K content had a significant increase, the counts of soil bacteria and fungi increased by 7. 9 and 18. 4 times and 3. 7 and 4. 3 times, respectively, but the soil urease and catalase activities remained unchanged, as compared with those under A. graceolens and S. plumbizincicola monoculture. The BIOLOG ECO microplates also showed that the carbon sources utilization level and the functional diversity index of soil microbial communities were higher under intercropping than under monoculture, and the concentrations of soil zinc and cadmium under intercropping decreased by 5.8% and 50. 0% , respectively, with the decrements being significantly higher than those under monoculture. It was suggested that soil microbial effect could be one of the important factors affecting plant growth.
- Subjects
SEDUM; APIUM; SOIL mechanics; ZINC toxicology; CADMIUM poisoning; SEWAGE sludge
- Publication
Yingyong Shengtai Xuebao, 2013, Vol 24, Issue 5, p1428
- ISSN
1001-9332
- Publication type
Article