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选择黄淮平原地区当前主推品种郑麦9023,以及早期引进品种阿勃和丰产3号为材料,利用微根管技术,研究冬小麦活根长和根直径径级的分布动态,以及以活根长为基础的净生长速率的变化规律.结果表明:根直径为0.05～0.25mm的细根是冬小麦根系的主要组成部分,根直径≤0.5mm的细根占活根长的98%以上;冬小麦的平均根直径随着生育进程不断变化,其变化范围为0.15～0.22mm,不同品种之间没有显著差异;活根长与根尖数呈显著正相关,表明根尖数是活根长增加的主导因素;返青期到拔节期是冬小麦根系生长最旺盛的时期,阿勃和丰产3号具有较长时期的根系增长活力,郑麦9023自拔节期以后根直径≥0.1mm的细根根尖数占总根尖数的比例有所上升,这有利于提高生育后期根系抗性和保证根系活性稳定,以满足籽粒灌浆的需要.
The main varieties of wheat variety Zhengmai 9023 in Huanghe-Huaihe Plain were selected, and the varieties of early-introduced variety Aboye and Feng-shu 3 were used as materials. The distribution of dynamic root length and root diameter diameter of winter wheat was studied by using the micro-root canal technique. The results showed that the fine root with root diameter of 0.05-0.25mm was the main component of winter wheat root system and the fine root with root diameter ≤0.5mm accounted for more than 98% of the live root length. The average of winter wheat Root diameter with the changing process of fertility, the range of 0.15 ~ 0.22mm, there is no significant difference between different varieties; root length and root number was significantly positive correlation, indicating that the root tip number is the dominant factor in living root length increased ; Returning to greening stage to jointing stage is the most vigorous growth of winter wheat roots, abercrombie and fitch sale, Abercrombie and Fahrenheit 3 and Abundance 3 have a longer period of root growth vigor, Zhengmai 9023 since the jointing period root diameter ≥0.1mm root tips accounted for the total The ratio of root tips increased, which is beneficial to improve the root resistance during late growth and ensure the stability of root activity in order to meet the needs of grain filling.