46 excellent families of Ulmus pumlia were collected in various parts of Shanxi Province for sowing and seedling cultivation.Their growth indicators were measured and analyzed to select families with better seedling height,basal diame-ter and height-diameter ratio.The results showed that there were extremely significant differences in seedling height,basal diameter and height-diameter ratio among different families of Ulmus pumila.According to multiple comparisons and coeffi-cient of variation,family 26 was the optimal family when screening based on seedling height.Family 29 was the optimal family when screening based on basal diameter,while family 4 was the superior family when screening based on height-di-ameter ratio.
ShanxiUlmus pumliaSeedling heightBasal diameterHeight-diameter ratio
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万方数据
