阿特拉津(Atrazine)是一种常用的除莠剂,但当以每英亩半磅的低剂量使用时,却显著地使格兰马草的产草量提高63％。其增产的原因不能简单地解释为因其是除莠剂而具有化学的除草作用。众所周知,当阿特拉津的施用剂量为每英亩2—4磅时,它通过破坏杂草的光合作用而灭除玉米地中的一年生杂草,而当其施用剂量较低时,却产生了异常的有益效果—低剂量施用不知什么原因却能促使格兰马 Atrazine is a commonly used herbicide, but when used at a low dose of half a pound per acre, it significantly increased grazing by 63%. The reason for its increase can not simply be explained by its chemical herbicidal effect as a herbicide. It is well-known that when atrazine is applied at a dose of 2 to 4 pounds per acre, it erases annual weeds in the corn field by destroying the photosynthesis of weeds and when it is administered at a lower dose, Unusual Benefit - Low-dose administration does not know what causes Grandma