在中学植物学教材中,新旧教材根的一节教学中都没有根的观察实验。实验所观察的根都是在培养皿中培养的。这是多年来一直沿用的方法,其效果甚差。现介绍植物根的两种方法如下: 1 烧杯法 取一个烧杯,用3～5层滤纸卷成一个筒,放到烧杯中,使滤纸紧贴烧杯的内壁,再把已经浸泡并萌动的种子,根向下插到烧杯上部烧杯与滤纸之间夹缝间。再在烧杯中加入约五 In middle school botany teaching materials, there is no observation experiment in the root of the old and new teaching materials. The roots observed in the experiments were all cultured in petri dishes. This is a method that has been used for many years and its effect is very poor. Here are two ways to introduce plant roots as follows: 1 Beaker method Take a beaker, roll 3 to 5 layers of filter paper into a tube, place it in a beaker, place the filter paper on the inner wall of the beaker, and then put the seed that has soaked and sprouted. Insert the root down between the beaker and the filter paper. Then add about five in the beaker