紫云英历来是我省早稻的重要肥源和大宗有机肥料.随着连作晚稻迟熟高产品种的推广,造成了紫云英苗期光照严重不足,幼苗纤细瘦弱,死苗较多.水稻收割后,又常受低温冰冻,加上冬春雨涝为害,致使紫云英产量普遍很低.本试验目的是,在春季紫云英低产定局的情况下,采用“以萍补草”措施,即利用东德细绿萍(Azolla filiculoides)耐寒、早发和快繁的生理特性,将紫云英提 Astragalus has always been an important source of fertilizers and bulk organic fertilizers for early rice in our province.With the promotion of continuous production of late-maturing late-maturing varieties of rice, the seedlings of Astragalus sinicus are severely deficient in light, with thin and thin seedlings and more dead shoots. , And often cold frozen, coupled with winter and spring rainfall damage, resulting in the production of milk vetch is generally low.The purpose of this experiment is that in the case of Ziyunying low birth, the use of “Ping Ping grass” measures, namely Using the physiological characteristics of Azolla filiculoides, which are hardy, early-onset and fast-propagation,