据自然区划统计,驻马店地区现有白榆706万余株。但都是混杂低劣未经改良的白榆品种,主干低矮弯曲。生产力很低。为了扭转这一局面,及早实现白榆良种化,大幅度地提高白榆生产水平,我们在表型选优、无性系测验的基础上,对有苗头的8019无性系视为良种有重点的进行示范推广。几年来已繁殖推广良种白榆53700株,初步表现出速生、干直等优点,现将示范推广的情况报告如下: According to the natural zoning statistics, there are more than 706,000 elm white elm in Zhumadian area. But all are mixed with poor unmodified elm species, low trunk bending. Productivity is low. In order to reverse this situation, as early as possible to achieve elm seed elm, greatly improve the production level of elm, we phenotypic selection, based on clonal testing, there are signs of the elite 8019 clone as a priority Demonstration promotion. Over the past few years have been breeding propagation elm 53,700 strains, initially showing the advantages of fast-growing, dry and so on, now the situation of the model to promote the report as follows: