---

作 者 ：吴金涛, 张锡洲, 李廷轩, 余海英

期 刊 ：植物营养与肥料学报 2010年 16卷 4期 页码：906-912

关键词：大麦；钾；基因型；生理生化；差异；

Keywords:barley, genotype, potassium, physiological and biochemical characteristics,

摘 要 ：盆栽试验研究了大麦钾高效基因型的吸钾特性和生理生化特性。结果表明，在不同供钾水平下，大麦钾高效基因型（Sandrime）含钾量均小于低效基因型（AC Westech）; 但生物量显著大于低效基因型，在苗期和分蘖期，两基因型生物量最大差异分别为2.4和2.1倍。大麦钾高效基因型（Sandrime）根系活力小于钾低效基因型（AC Westech），并随供钾水平的提高，其变化趋势不及低效基因型明显。两基因型叶绿素含量在正常供钾水平下达最大值，且高效基因型含量大于低效基因型; 钾高效基因型的SOD活性大于低效基因型，基因型差异在苗期最大为2.74倍，分蘖期最大为3.26倍; 而POD活性则为高效基因型小于低效基因型，基因型差异在苗期为2.94～4.98倍，分蘖期为2.12～2.76倍，在各供钾水平下均达显著差异水平。高效基因型的MDA和可溶性糖含量小于低效基因型，并随供钾水平的提高逐渐减少。

Abstract:The experiments of soil culture with different potassium(K) levels were carried out to study K absorption and its physiological and biochemical characteristics of K-efficient barley genotype. The results show that K content of the K-efficient barley genotype(Sandrime)is lower than that of the K-inefficient genotype(AC Westech)under the K levels, while biomass of the K-efficient barley genotype is significantly higher than that of the AC Westech(p＜0.05). At seedling and tillering stages, the biggest differences in biomass of these two genotypes are 2.4 times and 2.1 times respectively. Root vigor of the K-efficient barley genotype is lower than that of the AC Westech. The chlorophyll contents of the two genotypes reach their maximums when the K is offered normally, and the chlorophyll content of the K-efficient genotype is higher than that of the K-inefficient genotype. SOD activity of the K-efficient genotype is higher than that of the K-inefficient genotype, and the biggest difference is 2.74 times at seedling stage, and 3.26 times at tillering stage. However, POD activity of the K-efficient barley genotype is lower than that of the K-inefficient genotype, and the biggest difference is 2.94-4.98 times at seedling stage and 2.12-2.76 times at tillering stage. MDA and soluble sugar contents of the K-efficient genotype are lower than those of the K-inefficient genotype at the two stages.

---