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通过调查不同树种新造林树高生长量、保存率及其土壤细菌、真菌、放线菌数量等,研究其生长、适应性及对土壤微生物数量的影响。结果表明:光皮桦、桤木、楸树、栾树、湿地松5年生树高分别为7.4、6.5、6.3、4.8、4.2 m,保存率分别为92%、65%、82%、78%、90%;不同树种造林后对土壤微生物数量的提高有明显差异,5个树种造林后林分土壤微生物数量提高的效果排序为桤木>光皮桦>栾木>楸树>湿地松;新造林均表现为造林当年土壤微生物数量明显下降,一般下降35%～40%,第2年底回升并超过造林前水平,第3～5年逐年增加。
The growth, adaptability and number of soil microbes were studied by investigating the height growth and conservation rates of new tree species in different tree species and the quantity of soil bacteria, fungi and actinomycetes. The results showed that the 5-year tree height of Betula platyphylla, Alnus cremastogyne, Catalpa bungei, Koelreuteria paniculata and Pinus elliottii were 7.4, 6.5, 6.3, 4.8 and 4.2 m respectively and the preservation rates were 92%, 65%, 82% and 78% 90%. After the afforestation of different tree species, there was a significant difference in the increase of soil microorganisms. The order of the effect of increasing the number of soil microorganisms after afforestation was Alnus cremastogyne> Light bark> Luanmu> Catalpa tree> Pinus elliottii plantation; The results showed that the number of soil microorganisms decreased obviously from 35% to 40% in the year of reforestation. The number of soil microorganisms in the reforestation increased to the level before reforestation at the end of the second year and increased year by year in the third to fifth years.