小麦条锈病对小麦产量影响的研究——Ⅲ.病害对寄主库-源关系的影响

• 作 者: 杨小冰 曾士迈
• 机 构: 北京农业大学植物保护系,北京农业大学植物保护系
• 出 处: 中国科学(B辑 化学 生命科学 地学)
• 发表日期: 1989年03期
• 关键词: 小麦条锈病 小数条锈病 产量损失 库源关系 剪叶 扬花期 主库 相互补偿 旗叶 麦库

利用剪叶和测定扬花期后植株各器官干重变化等方法研究了小麦条锈病对小麦库-源关系的影响。研究结果表明:染病植株各叶片的绝对贡献值减小;相对贡献值不变,各叶片间功能比例关系不交,植株内的相互补偿作用降低。同时还发现染病植株可通过减少库容,缩短生育期,增大相对输出率等反馈机理来调节库-源关系,并且病情越重,相对输出率越大,经济系数越低。

The effect of wheat stripe rust on the sink-source relationship of wheat was studied by using the methods of cutting the leaves and measuring the dry weight of organs of each plant after flowering. The results showed that: the absolute contribution value of the leaves of infected plants decreased; the relative contribution value remained unchanged, the relationship between the functional proportions of the leaves did not cross, and the mutual compensation effect within the plants decreased. At the same time, it was also found that the diseased plants can regulate the relationship between the source and the sink by reducing the storage capacity, shortening the growth period, increasing the relative output rate and other feedback mechanisms, and the more serious the disease, the greater the relative output rate and the lower the economic coefficient.