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榆树具有适应性强,易繁殖,材质好等优良特性。近年来,我县从山东、河南省调入大批榆树种子,目前,榆树已成为我县主要造林树种之一。但由于管理不善,不仅成材慢,而且树身弯曲,木材利用率低。为了解决上述问题,使其成林、成材,达到速生丰产,我县苗圃于1975年定植两行榆树进行修剪试验,一行修剪,一行作对照(未修剪),并与同时同地定植的杨树进行对比。经过三年的观察,证明榆树修剪的效果很好。
Elm has strong adaptability, easy reproduction, good quality and other fine features. In recent years, our county transferred a large number of elm seeds from Shandong and Henan Provinces. At present, elm trees have become one of the main afforestation species in our county. However, due to poor management, not only become slow, but also bending the tree, timber utilization is low. In order to solve the above problems, make it into forest, timber, to achieve fast-growing and high yield, nursery in our county in 1975, two rows of elm planted in two rows of pruning test, his party for the control (not pruning), and at the same time with poplar comparing. After three years of observation, the effect of elm pruning proved very good.