关键词: 水蜜桃, 一年生枝条, 硅钾元素, 低温胁迫, 生理代谢

Abstract: [Objective] The aim of the study was to explore the effect of Si and K on the physiological metabolism in current branches of juicy peach at Daqing under the low temperature. [Method] This experiment had six different treatments, namely no Si and K application, basal application of Si(May 10^th), K addition on August 6^th, K addition on August and basal application of Si(May 10^th), K addition on September 6^th, K addition on September+ basal application of Si(May 10^th). All pot culture were un-der the low temperature in laboratory. Relative electrical conductance, soluble sugar content, soluble protein content, proline content and MDA content were measured after the low temperature stress. [Results] Si and K treatments obviously decreased the relative electrical conductance and MDA con-tent of the current branches of juicy peach but increased the contents of soluble sugar, soluble protein and proline, compared with the control. [Conclusion] Most indicators were better in current branches of juicy peach when treating with both Si and K at August. The results indicated that the treatment with Si and K could enhance the cold resistance of current branches of juicy peach and reduce the in-jury of low temperature to current branches. Especially, the combination of Si and K is better in improve the cold resistance.

Key words: juicy peach, annual branches, silicon and potassium, low temperature stress, physiological metabolism