芹菜与伴矿景天间作对污泥农用锌镉污染土壤化学与微生物性质的影响  

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.

作　　者：能凤娇[1,2] 吴龙华[2] 刘鸿雁[1,3] 任婧[1] 刘五星[2] 骆永明[2,4] 

机构地区：[1]贵州大学农学院,贵阳550025 [2]中国科学院南京土壤研究所土壤环境与污染修复重点实验室,南京210008 [3]贵州大学资源与环境工程学院,贵阳550003 [4]中国科学院烟台海岸带研究所海岸带环境过程重点实验室,山东烟台264003

出　　处：《应用生态学报》2013年第5期1428-1434,共7页Chinese Journal of Applied Ecology

基　　金：国家自然科学基金项目(41271326);国家高技术研究发展计划项目(2012AA06A204);贵阳市社发与民生科技计划项目(筑科合[2012103]);教育部211重点学科建设项目(211kst200902)资助

摘　　要：采集长期施用污泥导致的锌镉污染菜地土壤,通过盆栽试验研究芹菜与伴矿景天单作和两者间作模式下连续种植的修复效果.结果表明:随着修复次数的增加,单作处理中的植物生长不良,而间作处理下伴矿景天生长旺盛;与芹菜单作和伴矿景天单作相比,间作处理土壤有机质、速效氮、全氮、全磷显著降低,而速效钾浓度显著上升,土壤细菌数量提高7.9和18.4倍、真菌数量提高3.7和4.3倍,但脲酶和过氧化氢酶活性没有明显变化;BIOLOG结果也显示,间作处理下土壤微生物碳源利用能力和微生物群落功能多样性指数均显著高于单作处理;间作处理下土壤中Zn和Cd全量分别降低5.8%和50.0%,显著高于单作处理.表明土壤微生物效应可能是影响植物生长的重要原因之一.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 monocuhure and intercropping. With the remediation time increased, both S. plumbizincicola and A. graceolens under monocuhure 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 re- mained unchanged, as compared with those under A. graceolens and S. plumbizincicola monocul- ture. The BIOLOG ECO micro-plates also showed that the carbon sources utilization level and the functional diversity index of soil microbial communities were higher under intercropping than under monocuhure, 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 monocuhure. It was suggested that soil microbial effect could be one of the important factors affect- ing plant growth.

关 键 词：重金属污染 伴矿景天 芹菜 化学效应 微生物效应 

分 类 号：S636.3[农业科学—蔬菜学] S682.33[农业科学—园艺学]