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播期不仅对大麦品种（系）的产量及相关性状的表现有重要影响，而且会造成性状之间相互关系的变化和差异。这种差异可大体分为两种类型：一是在三个播期下性状之间相关的方向一致，但彼此关联的程度不同；二是在不同播期下性状相关的方向或性质发生了变化。因此，要根据不同育种目标或选择不同类型品种的需要，对性状之间的关系进行相应的研究，制定性状选择的合理模式，培育出理想的品种。
Sowing date not only has an important influence on the yield of barley varieties (lines) and the performance of related traits, but also causes the changes and differences in the correlation between traits. The differences can be broadly divided into two types: one is that the traits related to each other in three sowing dates are in the same direction but different in relation to each other; and the other is that the direction or property of the trait related to the different sowing dates has changed . Therefore, according to different breeding objectives or the need to choose different types of varieties, the relationship between the traits of the corresponding research to develop a rational model of trait selection, cultivate the ideal varieties.