Influence of manure application and copper input on copper fractionation and its biological effects were studied in this paper. The results showed that manure application and copper input all could affect the distribution of copper among different fractions. With the increase of copper input, the exchangeable copper only had a slight increase, while the other fractions increased rapidly. The relative amount of organically bound and manganese oxide bounded copper increased more rapidly. In the 200 rog/kg copper treatment, they were 28.3 times and 25.8 times that of the control, their percent in the total copper increased from 17.3％ and 15.9％ to 39.6％ and 33. 3％ respectively. With manure application, the manganese oxide bounded fraction decreased apparently. In no-copper input soil, the amount of manganese oxide bounded fraction decreased from 1.77 mg/kg of the control to 1.61 mg/kg of the 6％ manure treatment. In the 200 mg/kg copper input soil, manganese oxide bounded copper decreased from 61.48 mg/kg of the control to 26.04 mg/kg of the 6％ manure treatment.The organically bounded fraction increased with manure application. In soil without external copper input,the organically bounded copper increased from 1.37 mg/kg of the control to 2. 45 mg/kg of the 6％ manure treatment. When the copper input was 200 mg/kg, the organically bounded copper fractions in control and 6％ manure input treatment were 25.83,71.83 mg/kg respectively. Significant positive correlation of strawberry copper content with all soil copper fractions was found except that of organically bounded part with above ground copper. Manure application had little effects on strawberry copper in this experiment.
国家科技期刊平台
NSTL
维普
万方数据
