同位素土中注入法是测定根系活力的方法之一。将磷酸氢二钠注入土中范围较小的一定部位,一株作物只注入一点,再选择作物的一定部位测其放射性,即可获得作物某一生长时期的根活力。所测数据经统计学处理后列表、绘图可得到清晰的根活力分布图、测定时需用小型野升定标器,我们使用的是国产 DBX-1 Isotope soil injection method is one of the methods to determine root activity. Disodium hydrogen phosphate into a small part of the soil in a certain area, a plant only a little injection, and then select a part of the crop to measure its radioactivity, you can get crop growth during a certain period of root activity. The data measured by the statistical treatment of the list, the map can be drawn clear root vitality distribution, the determination of the need for a small wild rose scaler, we use the domestic DBX-1