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以10年生盆栽红富士苹果为试材,通过土施氯化镉研究了土壤镉含量对苹果叶片和果实镉含量的影响。结果表明:在苹果生长发育各时期,叶片中的镉含量随土壤中镉含量的增加而增加,两者呈显著正相关。在苹果叶片发育过程中其镉含量随土壤镉处理时间的延长而增加,果实缓慢生长期(9月23日)出现峰值,之后下降。果实成熟期的土壤镉含量对果实镉含量影响最为显著,根据该时期不同剂量镉处理的土壤和果实镉含量拟合方程,推算出生产无公害苹果的壤质褐土(pH7.133)镉含量阈值为2.59mg.kg-1。
Using 10-year-old potted Fuji apple as test material, the effect of soil cadmium on cadmium content in apple leaves and fruits was studied by soil cadmium chloride. The results showed that at each stage of apple growth and development, the cadmium content in leaves increased significantly with the increase of cadmium content in the soil, and there was a significant positive correlation between them. During the development of apple leaves, the content of cadmium increased with the prolongation of cadmium treatment time. The peak of fruit growth was slow (September 23), then decreased. According to the fitting equation of cadmium content in soils and fruits with different doses of Cd during this period, the cadmium content in loamy cinnamon soil (pH7.133) The threshold is 2.59 mg.kg-1.