介绍了20种彩叶树种在金昌的引种表现。通过对其开展相关试验,分析了它们的生物学特性、生态适应性和抗逆性,总结出其相应的育苗技术,为其在金昌地区推广应用提供了实践经验。

To study the flowering biological character of ancient male ginkgo trees in the different areas, this sudy had investigated and analyzed 33 ancient male ginkgo trees which came from main distribution areas of Ginkgo Boliba L. in China, including the anther length, the width of anther, the length of pollen, the width of pollen, the ratio of pollen productivity and the vitality of pollen. The results showed that the anther length of 33 ancient male ginkgo trees ranged from 1.53 mm to 3.17 mm and the average number was 2.54 mm; the width of anther ranged from 0.63 mm to 1.55 mm and the average number was 1.01 mm; the length of pollen ranged from 29.52 μ m to 36.82 μ m and the average number was 33.49 μ m; the width of pollen ranged from 13.69 μ m to 15.99 μ m and the average number was 15.23 μ m; the ratio of pollen productivity ranged from 12.90% to 36.65% and the average number was 23.66% ; the vitality of pollen ranged from 53.77% to 84.37% and the average number was 73.42%; variance analysis indicated that differences in all indexes of among 33 ancient male ginkgo trees were significant at 0.01 level except for the ratio of pollen productivity. The result of correlation analysis showed that the number of flower spikes on short shoot, the anther number of flower spikesand the length of flower spikes could be used as indexes to evaluate the ratio of pollen productivity of male ginkgo trees.

分析了臭椿在金昌市绿化中应用的可行性,提出了臭椿在金昌市可用于城区道路绿化、厂矿区绿化,土壤改良、林业经济开发等应用途径。