中文摘要：

为了评价不同亚麻品种（系）的钾利用效率差异,筛选出钾高效利用种质资源,在大田条件下,以22份亚麻品种（系）为试验材料,设置不施钾肥（K0）和施钾肥（K25）2个处理,分析亚麻株高、工艺长度、原茎产量、纤维产量、全麻率及其与钾利用效率的相关性。结果表明,施用钾肥有利于提高亚麻工艺长度、全麻率和纤维产量;经聚类分析,K0条件下,筛选出钾高效利用种质资源4份：双亚10、原2012-306、原2012-295和sxy130;K25条件下,筛选出钾高效利用种质资源2份：sxy130和原2012-306;K0条件下,钾利用效率与株高和全麻率极显著正相关,与工艺长度显著正相关,K25条件下,钾利用效率与株高、工艺长度和全麻率显著正相关。该研究可为亚麻钾高效利用机理研究及钾高效利用品种选育提供理论基础和试验材料。

英文摘要：

In order to evaluate the potassium use efficiency of different flax varieties（lines） and to screen the variety with the highest efficiency among germplasm resources, two potassium levels（K0 and K25）, 22 flax varieties（lines） were experimentally designed to investigate height, technical length, straw yield, fiber yield, fiber content and to study the correlation with potassium use efficiency under field condition. The results showed that potassium had a significant improvement on technical length, fiber content and fiber yield of flax. Four germplasm resources with high potassium use efficiency were screened out（shuangya10, yuan 2012-306, yuan 2012-295 and sxy130） under K0 condition, two germplasm resources with high potassium use efficiency were screened out（sxy130 and yuan 2012-306） under K25 condition by cluster analysis. Under K0 condition, potassium use efficiency had a significant positive correlation with height（P〈0.01）, technical length（P〈0.05） and fiber content（P〈0.01）, under K25 condition,potassium use efficiency had a significant positive correlation with height, technical length and fiber content（P〈0.05）. The results will provide theoretical basis for investigation and breeding of high potassium use efficiency.