1 种子活力测定的目的测定种子活力可以达到以下几个目的:预示成苗的能力,选择播种用的种子;按活力进行分级;预示各批种子相对的贮藏性;预示各品种相对播种量,来调节播种量;预示各品种相对机械损伤,检验机械损伤程度;预示将来产量;预示作物的整齐度。 2 种子活力的测定方法 2.1 物理测定方法: 种子的大小及色泽:一般种子大而色泽鲜艳的活力高。带电性(游离离子根):当种子通过电场时,带电的就会飞向负极向或正极向,好种子游离离子根少,带电少或不带电,活力强。软X射线测定法:可观测项目 1 Determination of seed vigor Objective Determination of seed vigor can achieve the following purposes: Predict the ability of seedlings, select the seeds for sowing; vitality by grading; indicating the relative storage of the seed batch; indicating the relative sowing of various varieties, to Adjust the sowing amount; indicate the relative mechanical damage of all varieties, check the degree of mechanical damage; predict the future output; indicate the uniformity of crops. 2 Determination of seed vitality 2.1 Physical determination of the method: the size and color of seeds: the general seed of large and bright color of high vitality. Charged (free ion root): When the seeds through the electric field, the charged will fly to the negative or positive direction, good seed less free radical, less charged or not charged, strong activity. Soft X-ray method: observable project