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本文报道了在14个试验点所作46个种源的地理变异和生态稳定性研究结果。发现我国白榆种源间存在着极大的异质性。生长力随纬度方向呈渐变模式,分布区南部黄淮流域的种源生长快,分布区北部各种源生长慢。试验点生境的优劣,对白榆生长影响很大,并存在有一定的种源×地点的交互作用。因此,根据多点的综合分析,提出了各种源的生产力和生态稳定性参数,为各造林地区选用适宜种源提供了依据。
This paper reports the results of the geographical variation and ecological stability of 46 provenances at 14 sites. Found that there is a great heterogeneity between the provenances of Chinese elm. The growth force is gradually changing with the latitudinal direction. The provenance of the Huang-Huai River basin in the southern part of the distribution area grows rapidly, and the growth of various sources in the northern part of the distribution area is slow. The habitat of the experimental site has great influence on the growth of Ulmus pumila, and there is a certain degree of provenance × site interaction. Therefore, based on the multi-point comprehensive analysis, the productivity and ecological stability parameters of various sources were put forward, which provided the basis for selecting suitable provenances for each afforestation area.