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以我国北方的主要牧草苜蓿、沙打旺、草木樨、三叶草、小冠花、燕麦草等９６个品种为材料，用６０Ｃｏ－γ射线照射干种子，研究其辐射敏感性及适宜剂量。结果表明，出苗率随照射剂量的增加而降低，它们之间呈负相关；依据半致死剂量，将牧草划分为辐射敏感型、中间型和迟钝型
Ninety-six cultivars including alfalfa, Astragalus adsurgens, shrubs, clover, cloverleaf and oat grass were used as raw materials in the northern part of our country. The seeds were irradiated with 60Co-γ ray to study their radiation sensitivity and appropriate dosage. The results showed that the emergence rate decreased with the increase of irradiation dose, and there was a negative correlation between them. Based on the lethal dose, the forage was divided into radiation-sensitive, intermediate and retardation