不同马铃薯品种块茎钾含量与相关生理特性的钾素响应度差异

doi:10.7668/hbnxb.20190071

摘要/Abstract

摘要： 为了研究不同马铃薯品种苗期块茎钾素含量以及其他相关生理特性随供钾水平不同的变化规律，采用田间试验方法对东农310、延薯4号和中薯5号在3个供钾水平下开展研究。结果表明：在K₀、K₁、K₂这3种供钾水平下，不同品种块茎钾素含量差异显著，且东农310苗期的钾素含量远高于中薯5号以及延薯4号。对低钾和高钾条件下马铃薯钾素含量与叶绿素（SPAD）、根系活力（RV）、丙二醛含量（MDA）、蔗糖合成酶（SS）以及蔗糖磷酸合成酶（SPS）进行了相关性分析，钾素水平较低的情况下，根系活力以及相关酶活性成为影响钾素含量的限制因素；而在高钾条件下，钾素含量与SPAD呈正相关，而与其他均呈负相关。因此，随着钾素供给水平的提高，钾素的供应量成为块茎钾含量提高的限制因子。

关键词: 马铃薯, 钾素含量, 钾素水平, 相关性分析

Abstract: In order to study the changes of potassium content and other related physiological characteristics in tubers of different potato varieties at seedling stage with different potassium supply levels, field experiments were conducted to study Dongnong 310, Yanshu 4 and Zhongshu 5 at three potassium levels. The results showed that under the three levels of K₀, K₁ and K₂, the potassium content of tubers in different varieties was significantly different, and the potassium content of Dongnong 310 seedlings was much higher than that of Zhongshu 5 and Yanshu 4. Correlation between potassium content in potato and chlorophyll (SPAD), root activity (RV), malondialdehyde content (MDA), sucrose synthase (SS) and sucrose phosphate synthase (SPS) under low potassium and high potassium conditions analysis, when the potassium level is low, root activity and related enzyme activity become the limiting factors affecting potassium content; while under high potassium conditions, potassium content is positively correlated with SPAD, but negatively correlated with others. Therefore, as the level of potassium supply increases, the supply of potassium becomes a limiting factor for the increase in tuber potassium content.

Key words: Potato, Potassium content, Potassium level, Correlation analysis

中图分类号:

S532.01

史佳文, 潘峰, 陈若男, 石瑛. 不同马铃薯品种块茎钾含量与相关生理特性的钾素响应度差异[J]. 华北农学报, 2019, 34(S1): 78-84. doi: 10.7668/hbnxb.20190071.

SHI Jiawen, PAN Feng, CHEN Ruonan, SHI Ying. Differences in Potassium Responsiveness Between Tubers and Related Physiological Characteristics of Different Potato Cultivars[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2019, 34(S1): 78-84. doi: 10.7668/hbnxb.20190071.

http://www.hbnxb.net/CN/Y2019/V34/IS1/78

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