在低、中、高剂量处理下，施用生物有机肥处理的苹果根系中镉含量比不施用生物肥处理分别降低了12%，15%，24%。
With the low, medium and high dose treatments, they are separately 12%, 15% and 24% lower in bio-fertilizer treated root than untreated ones.
以苹果矮化砧木sh40、M 26的生根试管苗为试材，采用水培方法，研究了根系铁离子吸收动力学特性。
The apple dwarf rootstock SH40 and M26 were used as material to study the kinetics of Fe2 + absorption by the method of hydroponic culture.
硼对苹果苗根系影响明显强于钙，而对整株发育则小于钙的作用。
Boron gave stronger root system than calcium, but calcium was better for whole plant development.
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