氮素是植物所需的最重要元素。测定植物体内的含氮量,对判断植物自土壤所能吸取的氮量,以确定合理施用氮肥,以及对研究植物体中氮素营养状况,培育新品种和品质鉴定,均有重要意义。目前测定氮素应用克氏法较为普遍,但耗水耗电量大,操作手续亦较烦琐,且需一套复杂的蒸溜设备。在学习外地经验基础上,采用扩散法测定植株,种子的全氮量,既简化了操 Nitrogen is the most important element required by plants. Determination of nitrogen content in plants, to determine the amount of nitrogen the plant can absorb from the soil to determine the rational use of nitrogen fertilizer, as well as nitrogen status of plants to study and cultivate new varieties and quality identification, are of great significance. The current determination of nitrogen application Karl’s Law is more common, but water consumption power consumption, operating procedures are more cumbersome, and requires a complex set of steaming equipment. On the basis of learning field experience, the total nitrogen content of plants and seeds is measured by diffusion method,