套袋与苹果果实中Pb、Cd、Cr含量关系的研究

Studies on Relations of Pb, Cd, Cr Content in Apple Fruits of Bagged and Unbagged

测定了洛川、白水试验园中的套袋及不套袋苹果果皮、果肉中的Pb、Cd、Cr含量．对其分布及其机理进行了研究。结果发现:①所采样品均达到国家无公害苹果标准。Pb的背景值高于Cd、Cr。②套袋与Pb、Cd、 Cr含量之间呈明显的相关性,即不套袋苹果、套单层育果袋苹果的Pb、Cd、Cr含量分别高于套袋苹果及套双层育果袋苹果。③育果袋的透气性越大,苹果中Pb、Cd、Cr的含量越高。④重金属主要集中在果皮中。由此可见,苹果套袋是降低苹果重金属含量的有效措施。

The content of Pb,Cd,Cr in peel and pulp of bagged and unbagged apple, which came from Luochuan and Baishui was tested, discussed the distribution of Pb,Cd,Cr in apple and mechanism detailly in this paper. The result showed that:①all samples reach the standard of social harmlessness, the background unmberical value of Pb in apple is more than others. ②there's a obvious relation between bagging and the content of Pb,Cd,Cr in apple, that is: the content of Pb, Cd,Cr in no-bagging is more than that in bagging, ③the bigger the porosity of bag is,the higher the content of Pb,Cd,Cr is.④Pb,Cd,Cr focus on peel mainly. So bagging is valid for reducing the content of heavy metals in apple.