前言苜蓿(Medicago)、沙打旺(Astragalus adsurgens)、红豆草(Onobrychis vicaefolia)和三叶草(Trifolium)具有异花授粉和自交不亲和或亲和率不高的特性。在这些牧草的育种工作中,无性繁殖是保持单株优良特性,加速后代繁殖,建立无性自交系或雄性不育系的重要手段。扦插是无性繁殖的简单易行的有效方法之一。1978年李逸民在接近大田条件下,用烧杯和塑料袋作罩,进行了苜蓿茎节扦插试验,总计260支,成活率达83％。朱懋顺教 Introduction Medicago, Astragalus adsurgens, Onobrychis vicaefolia and Trifolium have cross-pollination and incompatibility or low affinity. In these forage breeding, asexual reproduction is an important means to maintain the fine characteristics of individual plants, accelerate the propagation of offspring, and establish asexual inbred lines or male sterile lines. Cutting is one of the simple and effective methods of asexual reproduction. In 1978, Li Yimin near field conditions, with a beaker and plastic bags for cover, alfalfa stem cuttage test, a total of 260, the survival rate of 83%. Zhu Mao Shun teach