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当前位置: 首页 > 文章 > 近地层大气臭氧浓度升高对麦季土壤Zn生物有效性的影响 江苏农业学报 2016,32 (4) 791-797
Position: Home > Articles > Influence of elevated tropospheric ozone on the bioavailability of zinc in wheat-planted soil Jiangsu Journal of Agricultural Sciences 2016,32 (4) 791-797

近地层大气臭氧浓度升高对麦季土壤Zn生物有效性的影响

作  者：
魏思雨;王亚波;邵阳;韩书文;杨婷婷;尹微琴;王小治
单  位：
扬州大学环境科学与工程学院
关键词：
开顶式气室;臭氧浓度升高;锌;麦季;生物有效性
摘  要：
为明确大气O_3浓度升高对麦季各生育期不同土层中Zn生物有效性的影响,利用开顶式气室(OTCs)设置正常大气和臭氧浓度升高(比周围大气高40 nmol/mol)处理,土壤设置外源加入0 mg/kg、200 mg/kg、400mg/kg Zn处理,在小麦苗期、分蘖期、拔节期、抽穗期和成熟期分别采集耕层0~5.0 cm、5.1~10.0 cm、10.1~15.0cm各土层土样,同时利用BCR连续提取法和DTPA提取法评价盆栽小麦土壤Zn生物有效性。结果表明,大气臭氧浓度升高对整个耕层土壤(0~15.0 cm)Zn的有效性影响不显著;在成熟期显著增加了无外源Zn污染土壤0~5.0 cm和10.1~15.0 cm土层中Zn的有效性,其DTPA提取态Zn增幅分别为150%和241%,但在5.1~10.0 cm土层中DTPA提取态Zn显著降低42.4%;在小麦生育早期显著增大了外源加入400 mg/kg Zn污染土壤0~5.0 cm和10.1~15.0 cm土壤Zn的有效性。BCR连续提取法与DTPA浸提法在衡量有效态Zn变化趋势上有相似的规律,但BCR连续提取法测定的有效态Zn数值大于DTPA浸提法,且土壤Zn含量低时差异显著。
译  名：
Influence of elevated tropospheric ozone on the bioavailability of zinc in wheat-planted soil
作  者：
WEI Si-yu;WANG Ya-bo;SHAO Yang;HAN Shu-wen;YANG Ting-ting;YIN Wei-qin;WANG Xiao-zhi;College of Environmental Science and Engineering,Yangzhou University;
关键词：
open top chamber;;elevated ozone concentration;;zinc;;wheat season;;bioavailability
摘  要：
The objective of this study was to clarify the changes of the bioavailability of zinc in the soil affected by atmospheric elevated ozone( O_3) during wheat season. Open top chamber( OTCs) were used to set up normal atmospheric conditions and elevated atmospheric O_3( 40 nmol/mol higher). Three levels of exogenous zinc were applied( 0 mg/kg,200 mg / kg,and 400 mg / kg) soil samples collected at 0-5 cm,5. 1-10. 0 cm and 10. 1-15. 0 cm depth of topsoil at seedling,tillering,jointing,heading,and maturity respectively. The bioavailability of soil Zn was evaluated by the Community Bureau of Reference( BCR) sequential extraction and the DTPA extraction method. The elevated O_3 level had no significant influence on the bioavailability of soil zinc in the topsoil. The zinc availabilities in non-polluted soil at 0-5. 0 cm and 10. 1-15. 0 cm depths were increased at maturity by elevated O_3 level,with the increments of 150. 0% and 241. 0% using DTPA method,while in the soil at 5. 1-10. 0 cm the zince availability was decreased by 42. 4%. Exogenous zinc at the application rate of400 mg / kg boosted the soil zinc availabilities at 0-5. 0 cm and 10. 1-15. 0 cm depths. BCR method outperformed DTPA in describing the change of available zinc at low initial zinc concentration.

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