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白榆(Ulmus Pumila L、)是我国主要的造林树种,生长快材质好,分布广泛,适应性较强,全国各地广为栽培和利用。在50—70年代也是我地区绿化造林的主要树种。通过生产实践证明,分布我区的白榆,由于遭受榆紫金花虫的危害,生长缓慢,干形松散、弯曲,所以,栽培较少。但由于其木材是主要农用材,仍需适当发展。鉴于这种情况,我所于1980年参加了由中国林科院林研所主持的全国白榆种源选择协作组,探讨白榆不同地理种源遗传变异的规律;选择适宜我区白榆造林的最佳种源;并且提出合理发展和利用白榆资源及提高林分生产力的科学依据。现将几年来试验结果初报如下。
Ulmus pumila L. is the main afforestation tree species in China. It grows fast with good material, wide distribution and strong adaptability. It is widely cultivated and utilized throughout the country. In the 1950s and 1970s, it was also the main tree species afforestation in our area. Through production practice has proved that the distribution of the elm in my area, due to the harm caused by Elm purple flower insects, slow growth, dry loose, curved, so less cultivated. However, due to its wood is the main agricultural timber, still need to develop properly. In view of this situation, I participated in 1980 by the Chinese Academy of Forestry Lin Institute presided over the national white elm provenance selection collaboration group to explore the genetic eligibility of different geographical provenances of elm rules; choice for our area elm afforestation The best provenance; and put forward the scientific basis for the rational development and utilization of elm resources and improve stand productivity. Now the first few years test results are as follows.