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内蒙古林科院在1976—1987年以内蒙古巴盟白榆、兰旗白榆、河南孟县白榆为母本,以河南孟县白榆、内蒙古清水河县白榆和巴盟红皮白榆、黄榆为父本,采用人工杂交的方法选育出8个速生榆树杂种。它们均为早期速生,在内蒙古林科院,3年苗期对比试验,高生长量为呼市白榆的133～195％,径生长量为122—189％。8年区域造林试验,表现最好的是巴盟白榆×清水河白榆:树高为13.5m,胸径18.3cm,年平均高生长量1.75m,径生长量2cm,其余7个杂种年平均高生长量均在1.39～1.63m,径生长量为1.73～2.03cm,为呼市白榆高生长量的111～140％,径生长量的173—203％。这8个品种抗旱性强,都具有较强的适应性,适于栽植在呼包、河套平原和乌盟丘陵地区。
Inner Mongolia Academy of Forestry in 1976-1987, Inner Mongolia Bamaum elm, blue flag elm, Henan Meng County elm as the female parent to Henan Mengxian elm, Inner Mongolia Qingshuihe County elm and banyan red elm , Yellow elm as the male parent, the method of artificial hybrid breeding eight elm hybrids. They are early fast-growing, in Inner Mongolia Academy of Forestry, three years of seedling comparison test, the high growth of Hohhot elm 133-195%, diameter growth of 122-189%. 8 years of afforestation experiment, the best performance is the whitebaum B × Qingshuihe Baoyu: tree height of 13.5m, diameter 18.3cm, the average annual growth of 1.75m, diameter growth 2cm, and the remaining seven hybrids average annual The high growth rates ranged from 1.39 to 1.63 m with a diameter of 1.73 to 2.03 cm, accounting for 111 to 140% of the growth of Baiyu high in Hohhot and 173-203% of the diameter growth. These eight varieties of drought-resistant, have strong adaptability, suitable for planting in the call packet, Hetao plain and Um Hilly area.