不同马铃薯品种块茎中铁的积累规律

为探究铁元素在马铃薯块茎中的吸收积累规律，从而为马铃薯的品质改善提供合理依据，以马铃薯品种‘延薯4号’、‘东农311’、‘克新13号’和‘克新18号’为试验材料，在块茎形成到收获的全生育期内，进行块茎中铁元素吸收积累规律的研究。结果表明：随生育进程期的推进，不同的品种块茎中铁元素浓度表现相似的变化规律，铁浓度最大值出现在第1次取样时，并在整个取样期间表现降低-升高-降低-升高的变化规律，但不同品种升高降低的时期不同；至最后一次取样，块茎铁含量为‘东农311’＞‘克新13号’＞‘延薯4号’＞‘克新18号’，范围为41.8~51.2 mg/kg。4个品种块茎的铁积累量随生育时期的推进整体呈升高的趋势；4个品种块茎的铁积累量和干物质积累量相关性均达显著水平。

Accumulation of Iron in Tubers of Different Potato Varieties

The experiment use‘Yanshu4＇,‘Dongnong311＇,‘Kexin13＇,‘Kexin18＇as the tested materials, inorder to research the absorption and accumulation of Fe in tubers of different potato varieties during samplingperiod,to provide a reasonable basis for potato quality improvement. The results showed： during all thesampling stages, the concentrations of iron in tubers of different potato varieties show a similar patter, reduce-rise-reduce-rise patter, but in different varieties, the rise and reduce times were different. The maximum valueappeared in the first sampling period; the tuber iron concentration of 4 varieties was‘Dongnong311＇〉‘Kexin13＇〉‘Yanshu4＇〉‘Kexin18＇, the range was 41.8-51.2 mg/kg. Iron accumulation in tubers of fourvarieties showed a trend of rising over all the growth period basically, and the correlation of iron accumulationanddry matteraccumulation in tubers of four varietieswassignificant.