自1972年绿萍北移辽宁成功后,吉林、黑龙江也相继引进试养。目前东北三省已发展到7万亩,除主要做饲料利用外,还进行了稻田养萍试验,也取得良好结果。同时在绿萍越冬保种方面,也研究了一些行之有效的方法,如大量越冬用火炕式温室、地窖温室,小量越冬用罐头瓶、小口瓶、塑料袋等。1977年冬,我所试验利用日光温室越冬,在不加温的情况下,做到了安全保种。现将这种温室及其管理方法介绍如下。构造及效能这种温室和蔬菜一面坡温室基本相同(如图)。越冬床在室内南侧,系由地面向下挖20厘米的平床,(床的大小视温室内所利用的面 Since 1972, Lupin moved north Liaoning succeeded, Jilin, Heilongjiang have also introduced trial. At present, the three northeastern provinces have developed to 70000 acres, in addition to the main feed use, but also carried out paddy field Yangping test, also achieved good results. In the meantime, some effective methods have also been studied in the conservation of green plantains, such as a large number of overwintering kang type greenhouse, cellar greenhouses, a small amount of winter cans, small mouth bottles, plastic bags and so on. The winter of 1977, I tested the use of solar greenhouse wintering, did not warm the case, to achieve a safe seed. Now this greenhouse and its management methods are as follows. Structure and efficiency of this greenhouse and vegetable side slope greenhouse basically the same (pictured). Overwintering bed in the south of the house, the Department of digging down from the ground 20 cm flat bed (bed size depending on the use of the surface of the greenhouse