大豆品种的抗倒伏性问题

SOME PROBLEMS CO NCER NI NG THE RESISTANCE TO LODGI NG IN SOYBEAN CULTIVARS Tian Peizhan

摘要:

大豆品种的抗倒伏性是一个重要的生态性状。它的形成与光照和肥力的绝对水平及两者的相对比例有关。同等抗倒伏性的大豆品种,由于降水量及共在大豆生育期间的分布不同而具有不同的茎秆类型.在不相适宜的条件下抗倒伏性的表现会发生变化。大豆品种的抗倒伏适应性差异还表现在对土壤肥力的反应范围上。一些品种的适应范围较宽,而另一些较窄。具有适宜抗倒伏性的大豆品种能充分发挥其产量潜力并在各年份间保持较稳定的产量。抗倒伏性是一个多种性状构成的综合性状,其中茎秆的强韧度占有最重要地位。本文还分析了大豆抗倒伏性与其他生态性状的关系。

Abstract:

The resistance to lodging was an important ecotypic characterestic that was related to the relative difference between light intensity and soil fertility. Soybean cultivars with the same resistance to lodging from various locations had different stem type because of the difference in preciptitation and its distribution in growing season.
Soybean cultivars were different in adaptability to soil fertility, some wide and some narrow. Optimum resistance to lodging may make cultivars both to bring the yield potential into full play and to maintain stable yield in different years. Resistance to lodging was a complex charatercstic that was influenced by many factors. The strength and the tenacity of the stem was the most important ones. The relationship between the resistance to lodging and other characterestics was discussed.