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首页> 外文期刊>Plant and Soil >INFLUENCE OF ACID RAIN AND OZONE ON SOIL HEAVY METALS UNDER LOBLOLLY PINE TREES - A FIELD STUDY
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INFLUENCE OF ACID RAIN AND OZONE ON SOIL HEAVY METALS UNDER LOBLOLLY PINE TREES - A FIELD STUDY

机译：松树下酸雨和臭氧对土壤重金属的影响-田间研究。

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摘要

A field growth chamber study was conducted to determine the effects of ozone and simulated acid rain (SAR) on soil heavy metals. Loblolly pine (Pinus taeda L.), grown in open-top chambers, was exposed to three concentrations of ozone (charcoal filtered air with 0.026 mu L O-3 L(-1), and two non-filtered treatments in which ozone concentrations were 0.074 mu L L(-1) and 0.147 mu L L(-1), respectively) and two levels of SAR (pH 3.5 and 5.2). Ozone was applied for 12 h d(-1) for 9 months and acid rain deposition was 125 mm event(-1). After 9 months exposure, soil pH, organic matter and DTPA-extractabIe heavy metals (Cd, Pb, Zn, Mn, Fe, Cu) were determined on soil samples collected from exposed chambers at two depths (0-15 cm and 15-30 cm). Simulated acid rain decreased the original soil pH. The concentrations of Cd, Pb and Mn at SAR pH 3.5 were significantly higher than at SAR pH 5.2. Ozone did not affect Zn, Fe and Cu, but a significant interaction between pH and O-3 On Mn, Pb and Cd was observed. Due to the poor drainage capacity of this soil, leaching of heavy metals was not observed.
机译：进行了田间生长室研究，以确定臭氧和模拟酸雨（SAR）对土壤重金属的影响。在开顶室中生长的火炬松（Pinus taeda L.）暴露于三种浓度的臭氧（活性炭过滤后的空气中含0.026μL O-3 L（-1）的空气和两种未经过滤的臭氧浓度较高的处理分别为0.074亩LL（-1）和0.147亩LL（-1）和两个水平的SAR（pH 3.5和5.2）。臭氧处理后12 d（-1）d持续9个月，酸雨沉积为125 mm事件（-1）。暴露9个月后，在两个深度（0-15厘米和15-30厘米）从暴露室收集的土壤样品中测定土壤的pH值，有机物和DTPA可萃取的重金属（镉，铅，锌，锰，铁，铜）。厘米）。模拟的酸雨降低了原始土壤的pH值。 SAR pH 3.5时Cd，Pb和Mn的浓度显着高于SAR pH 5.2时。臭氧不影响锌，铁和铜，但在pH，O-3与锰，铅和镉之间存在显着的相互作用。由于该土壤的排水能力差，未观察到重金属的浸出。

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