The potassium absorption, accumulation of potato in winter was carried out by field experiment with NPK basal fertilizer and top dressing proportion. The results showed: The potassium concentration in the leaves reached a peak about 65 days after full emengence and then decreased; In the stems, the potassium concentration reached the peak 15 and 45 days after full emengence; In the tubers, the concentration of potassium in the mass reached the maximum 35 days after full emengence, and then decreased. In cold and wet year, 5.82 kg potassium (K), and 7.28 kg (K) in cool and dry year was needed to produce 1 000 kg of tubers. Potassium in the leaves reached the peak after full emengence 5 days, about 70% potassium was allocated to leaves and then decreased to about 10% in last stage. Potassium in the stem reached the peak after full emengence 15 days, about 30%, at last about 10% of the potassium still kept in leaves; In tubers, potassium distribution ratio increased gradually, about 80% potassium transferred into tubers in the end of development stage.%通过氮磷钾基肥、追肥比例田间试验,研究冬种马铃薯对钾素吸收、积累和分配规律.结果表明:叶片中钾素含量在齐苗后65 d左右出现一个峰值后降低；在茎中,在齐苗后15 d和45 d出现双峰曲线；块茎中,在齐苗后35 d左右达到最大,然后下降.湿冷年型,每生产1 000kg块茎需要吸收钾素(K)5.82 kg;干凉年型,每生产1 000kg块茎需要吸收钾素(K)7.28 kg.钾素在叶片中的分配率在齐苗后5d左右最高,70％以上的钾素分配到叶片,此后逐渐下降至10％左右;茎中的分配比率在齐苗后15d左右最高,达到30％左右,此后逐渐下降并保持在10％左右;块茎中,钾素分配比率逐渐增加,到生育末期,有80％左右的钾素分配到块茎中.
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