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在青藏高原东缘四川红原高寒地区,分析了燕麦(Avena sativa L.)倒伏与品种、株高、单株干重、茎秆强度、茎粗、第一茎节间长、第一茎节间干重、穗位高及根系条数的关系。结果表明,所测定7个燕麦品种均在孕穗期出现部分倒伏,花期倒伏率最大;燕麦品种抗倒伏能力为林纳>青燕1号>青海444>青引1号>青引2号>青海甜燕麦>青引3号莜麦;其中单株重、第一茎节间干重是影响燕麦倒伏的主要因子(P<0.01),株高和穗位高对燕麦倒伏影响次之(P<0.05)。研究认为在燕麦品种选育过程中,可以适当放宽对株高的限制,重点选育单株干重大、基部第一茎节间干重大的品种。
In the eastern part of Qinghai-Tibet Plateau, in the plateau of Hongyuan, Sichuan Province, the effects of lodging and varieties, plant height, dry weight per plant, stem intensity, stem diameter, first stem length, Between dry weight, ear height and the number of root system. The results showed that all of the seven oat varieties tested showed partial lodging at the booting stage, and the lodging rate was highest at the booting stage. The lodging resistance of the oat varieties was Linna> Qingyan No.1> Qinghai444> Qing Yin No.1> Qing Yin2> Qinghai Sweet oats> oolong on No.3 of Qing Yin. The dry weight per plant and the first internode were the main factors that affected the lodging of oats (P <0.01), and the plant height and ear height were the second most affected by the lodging of oats (P < 0.05). The research suggests that the limitation of plant height can be relaxed properly during the breeding of oat varieties, with the emphasis on breeding varieties with large dry weight per plant and large dry weight between the first stems on the base.