关键词: 苹果, 铜, 形态, 吸收, 分布, 关系

Abstract: The content and fractionation of copper in orchard soils was investigated and relations of soil copper status with apple up take was also studied in this paper. The results showed that copper accumulated gradually in orchard soils. The content in orchard soilswasmuch higher than that in the nonorchard fields and it increased with orchard age. Copper in soil was unevenly distributed vertically, decreasing sharply from top to the deeper layers, and the differences among different layerswere significant though significant correlations was also noticed. As to the fractions, organically bound and oxides bound copper accounted for most part of the total copper in soil and exchangeable fraction was much lower. All fractions had a tendency to decrease with dep th and both significant differences and significant correlations were found among copper fractions in different layers. Fruit copper and copper in shoot all had good correlations with total copper and copper fractions in top layer and some fractions in deeper layers.

Key words: Apple, Copper, Fraction, Uptake, Distribution, Relation