| 两种外源性有机物料对设施土壤磷变化的影响 |
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| 引用本文： | 黄敏,尹维文,余婉霞,周开来,黄永炳,石小娟.两种外源性有机物料对设施土壤磷变化的影响[J].农业环境科学学报,2015,34(3):501-508. |
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| 作者姓名： | 黄敏 尹维文 余婉霞 周开来 黄永炳 石小娟 |
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| 作者单位： | 武汉理工大学资源与环境工程学院, 武汉 430070,武汉理工大学资源与环境工程学院, 武汉 430070,武汉理工大学资源与环境工程学院, 武汉 430070,武汉理工大学资源与环境工程学院, 武汉 430070,武汉理工大学资源与环境工程学院, 武汉 430070,武汉理工大学资源与环境工程学院, 武汉 430070 |
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| 基金项目： | 国家自然科学基金青年科学基金项目(41101210);武汉理工大学国家级大学生创新创业训练计划项目(20141049708004) |
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| 摘 要： | 采用室内强化模拟试验研究了90 d培养期内稻草和草炭2种外源性有机物料对设施菜地土壤磷素转化的影响。结果显示,与对照相比,添加量为2 g C·kg-1和4 g C·kg-1的稻草处理土壤微生物生物量磷分别增加111.1%~310.0%和197.7%~356.3%,草炭处理分别增加23.7%~54.6%和63.2%~157.1%;添加量为2 g C·kg-1和4 g C·kg-1的稻草处理土壤有效磷平均降低了15.0%和20.2%,草炭处理土壤有效磷与对照差异在前期(45 d)并不显著;土壤易解吸磷30 d后持续降低,培养结束时稻草和草炭处理土壤易解吸磷均值分别降低了21.3%和10.9%。以培养结束时各组分磷占全磷的比例来看,稻草和草炭均可促进土壤无机态的Al-P、Fe-P、O-P及有机态的MLOP、HROP等组分向有机态的LOP和MROP转化,土壤微生物生物量磷、有效磷和易解吸磷均与Fe-P呈显著线性相关。研究表明,添加稻草和草炭有利于设施土壤磷素的管理,且稻草的效果总体上比草炭的要好;Fe-P是调控设施土壤磷素周转与流失的重要形态。
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| 关 键 词： | 土壤磷 转化 设施菜地 磷形态 外源性有机物料 |
| 收稿时间： | 2014/10/20 0:00:00 |
Effects of Two Organic Amendments on Phosphorus Transformation in Greenhouse Soil |
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| HUANG Min,YIN Wei-wen,YU Wan-xi,ZHOU Kai-lai,HUANG Yong-bing and SHI Xiao-juan.Effects of Two Organic Amendments on Phosphorus Transformation in Greenhouse Soil[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2015,34(3):501-508. |
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| Authors: | HUANG Min YIN Wei-wen YU Wan-xi ZHOU Kai-lai HUANG Yong-bing and SHI Xiao-juan |
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| Institution: | School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China,School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China,School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China,School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China,School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China and School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China |
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| Abstract: | The main objective of the present study was to determine the capacity of mixtures of some inorganic amendments to reduce the bioavailability of heavy metals in multiple-metals-contaminated acidic soil. Incubation experiment with orthogonal experimental design was conducted to study the efficiency of mixed inorganic amendments in increasing soil pH and decreasing the mobility of Cd, Pb, Cu and Zn in a multi-metals-contaminated acid soil collected from the Dabaoshan area of Shaoguan City, Guangdong Province. Then a pot experiment was carried out to examine the effects of six different combinations of three inorganic amendments on heavy metal bioavailability and growth and heavy metal accumulation of red leaf lettuce(Lactuca sativa L.). All combinations of three inorganic amendments significantly increased soil pH and reduced the mobility and bioavailability of Cd, Pb, Cu and Zn in soil. The ability of immobilizing soil Pb, Cd, and Zn decreased in order of limestone > hydroxyapatite > zeolite, but for soil Cu it was limestone> zeolite> hydroxyapatite. There were significant negative correlations between soil pH and bioavailable Cd, Zn, and Cu. When soil pH was raised to 6~7 by supplying inorganic amendments, red leaf lettuce grew healthy and the highest shoot biomass was obtained in soil treated with 4 g·kg-1 zeolite+2 g·kg-1 limestone+6 g·kg-1 hydroxyapatite. However, over-doses of inorganic amendments inhibited the growth of red leaf lettuce. Though all these mixed amendments significantly reduced the bioavailability of Pb and Cd in soil, the shoot Cd concentrations were still greater than 0.2 mg·kg-1(the limit for food health standard), while shoot Pb concentrations were close to the limit value(0.3 mg·kg-1). In summary, mixed amendments of limestone, zeolite and hydroxyapatite can improve the growth of red leaf lettuce in multi-metals contaminated acid soil, but the safety of red leaf lettuce is still a concern. |
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| Keywords: | soil phosphorus transformation greenhouse vegetable soil phosphorus fraction organic amendments |
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