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首页> 外文期刊>Plant and Soil >CADMIUM STATUS OF SOILS AND PLANTS FROM A LONG-TERM FERTILITY EXPERIMENT IN SOUTHEAST NORWAY
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CADMIUM STATUS OF SOILS AND PLANTS FROM A LONG-TERM FERTILITY EXPERIMENT IN SOUTHEAST NORWAY

机译：挪威东南部长期肥力试验中土壤和植物的镉含量

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To determine whether the use of phosphate fertilizer resulted in measurable cadmium accumulation in soils and crops harvested, soil and plant samples were collected from some selected treatments of a seventy year-old fertilizer experiment at Moystad, southeast Norway. Soil samples after extraction with Aqua Regia or 1 M NH4NO3 and plant samples after digestion were analyzed for Cd. Cadmium balance based on fertilizer and atmospheric inputs and crop removal and leaching losses was worked out. Neither the total nor the available (NH4NO3 - extractable) Cd in the soil was significantly affected by Cd added through fertilizer, though a tendency of higher Cd in soils from the plots receiving higher amounts of fertilizer was seen. The same trend was also observed for the Cd concentration in plants. Annual Cd input rates (fertilizer and atmosphere) varied from 1.20 to 2.57 g Cd ha(-1) y(-1) and the Cd removal (crops and leaching) rates varied from 1.16 to 1.79 g Cd ha(-1) y(-1). The balance calculations based on the seventy years data indicated Cd accumulation in the soil was <1 g Cd ha(-1) y(-1), but that increasing the doses of either commercial fertilizer or farm yard manure would likely result in increased accumulation of the element. This may have a negative impact because the available soil Cd content would be increased at a faster rate, resulting in increased plant uptake. Although Cd tended to accumulate as a result of P fertilization, the rate of increase was slow. The annual increase in the total Cd content of fertilized plots varied from 0.04 to 0.12% indicating that it may take from 800 to 2000 years, depending upon the fertilizer input, to accumulate Cd equivalent to that currently present in the soil.
机译：为了确定使用磷肥是否导致可测量的镉和镉在所收获的土壤和农作物中的积累，从挪威东南部Moystad一项具有70年历史的肥料实验的部分选定处理中收集了土壤和植物样品。用Aqua Regia或1 M NH4NO3提取后的土壤样品和消化后的植物样品中的Cd进行了分析。确定了基于肥料和大气投入以及作物去除和浸出损失的镉平衡。通过肥料添加的镉对土壤中的总Cd和可用的（NH4NO3-可提取的）Cd都没有显着影响，尽管从施用更多肥料的地块中可以看出土壤中Cd的升高趋势。对于植物中的镉浓度也观察到了相同的趋势。年度Cd输入速率（肥料和大气）从1.20到2.57 g Cd ha（-1）y（-1）不等，Cd去除率（作物和浸出）从1.16到1.79 g Cd ha（-1）y（不等） -1）。根据七十年的数据进行的平衡计算表明，土壤中Cd的积累量小于1 g Cd ha（-1）y（-1），但是增加商品肥料或农田肥料的剂量可能会导致积累量增加的元素。这可能会产生负面影响，因为可用土壤中Cd的含量将以更快的速度增加，从而导致植物吸收增加。尽管施磷使镉趋于积累，但增速缓慢。施肥地的总Cd含量的年增长率从0.04％到0.12％不等，这表明要花800至2000年的时间才能积累相当于土壤中当前存在的Cd，具体取决于肥料的投入。

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