摘要
对冶力关森林公园的天然林和人工林土壤微生物区系进行了研究,试图阐明天然林和人工林土壤微生物数量及其分布特征,为进一步研究冶力关森林公园天然林和人工林群落的生态学过程,制订退化林地土壤生态系统的恢复和重建对策提供科学依据.结果表明:冶力关森林公园的天然林和人工林土壤中各类微生物数量的变化很大,天然林土壤:细菌(2.535×109)>放线菌(1.701×105)>真菌(1.507×106);人工林土壤:细菌(2.260×109)>放线菌(1.433×105)>真菌(4.018×106).土壤微生物特殊生理类群数量在人工林和天然林中的分布组合有相同趋势,即:好气性固氮菌>好气性纤维素分解菌>氨化细菌>硝酸菌>亚硝酸菌.其中,在所研究的林型中,土壤微生物数量在土壤剖面上具有相似的垂直分布特征.各类微生物的数量随着土层深度的增加而减少,呈现的规律为A层>B层>C层>D层>E层.
Soil microbe been researched,trying to s types and to provide scienti flora of artificial forests and natural forests in the Yeliguan Forest Park had how the soil microorganism numbers and its spatial pattern in the two forest fic evidences for revealing mechanism of soil degradation,restoring species di- versity and finding out technique ways of prevention. The results indicated that there were significant changes of microorganism quantity in the natural forests and artificial forests in the Yeliguan Forest Park. The microbe flora in the natural forest soil was composed of as follows：bacterium （2. 535 × 10^9）〉actinomycetes （1. 701 × 10^5 ）〉fungi（1. 507 × 10^6 ） ,and the microbe flora in the artificial forest soil was composed of as follows, bacterium （2. 260 × 10^9 ）〉actinomycetes（1. 433 × 10^5 ）〉 fungi（4. 018 ×10^6 ）. The microorganism amount dirtribution of physiological groups both in the natural forest soil and the artificial forest soil tended to be the same： Aerobic nitogenfixing bacteria〉 Aerobic cellulose-decomposing bacteria〉 Ammoniation bacteria〉Nitrified acid bacteria〉Sulnitrate acid bacteria. And the amount of vertical distribution in the soil profiles in the different forest types were similar. Along with increasing of the soil depth ,the microbe quantitative rapidly reduced, namely ： A〉 B〉 C〉 D〉 E.
出处
《甘肃农业大学学报》
CAS
CSCD
2007年第1期63-67,共5页
Journal of Gansu Agricultural University
