摘要
以甘肃省漳县当归为材料,模拟雨水淋溶途径,研究了当归不同发育期的化感作用。结果表明,当归具有自毒作用,且不同发育期自毒效应不同,其强弱程度为:营养期>幼苗期>繁殖期>成熟期;地上部自毒效应强于根部;各发育期自毒效应具有一定的浓度依赖性。因此认为,自毒作用是造成当归连作障碍的因素之一,雨水淋溶是自毒物质释放的一条重要途径。
The self-allelopathy ofA ngelica sinensis （Oliv.） Diels in different development stages from Zhangxian of Gansu province was studied by simulating the way of rain eluviation. The result showed that Angelica sinensis （Oliv.） Diels had autotoxicity, and autotoxic effects were not the same in different development stages. The autotoxic sensitivity was in order of nutrition stage〉seedling stage〉reproduction stage〉maturation stage. The autotoxic effect from above-ground organs was stronger than root. In different development stages, autotoxic effect increased with concentration up. Therefore, autotoxicity was one of the factors leading to succession cropping obstacle, and rain eluviation was an important way of autotoxic chemicals releasing.
出处
《安徽农业科学》
CAS
北大核心
2008年第2期605-607,611,共4页
Journal of Anhui Agricultural Sciences
基金
甘肃省中青年科学基金项目(3YS061-A25-030)
西北师范大学大学生科研资助项目(2006)
关键词
当归
发育期
水浸液
自毒作用
连作障碍
Angelica sinensis （Oliv.） Diels
Development stage
Aqueous extract
Autotoxicity
Succession cropping obstacle
