蔷薇科植物重瓣榆叶梅,早春开花,先花后叶,花色艳丽,是北方城市绿化的优良树种。1985年以来,我们作扦插育苗试验,生根率达90%。插床东西向,长10米,宽1米,底土深翻拉平,上铺厚15厘米的河沙,床面作拱棚加盖塑料薄膜,扦插前一天用千分之三的高锰酸钾液消毒。夏季,剪取母株中上部一年生枝,长10厘米,留2片叶,剪去每片叶的一半。下剪口呈 Rosaceae double petunia plum, flowering in early spring, the first flower after the leaves, bright colors, is an excellent city tree species in northern cities. Since 1985, we cuttage nursery test, rooting rate of 90%. Insert bed east and west, 10 meters long, 1 meter wide, deep subsoiled floor, the upper layer of 15 cm thick sand, covered with plastic sheeting for the bed, the day before the cuttings with three thousandths of potassium permanganate solution disinfection . In summer, the upper branch of the mother plant is cut, 10 cm long and leaves 2 leaves, cutting half of each leaf. Under the cut was