小兴安岭3种阔叶红松林土壤微生物多样性

Soil microbial diversity of herb layer in three broad-leaved Korean Pine Forests

采用BIOLOG微平板法对小兴安岭3种阔叶红松林土壤微生物多样性进行了研究。结果表明,平均吸光值(AWCD)在春季表现为,蒙古栎(Quercus mongolica)红松林>椴树(Tilia amurensis)红松林>白桦(Betula platyphylla)人工林;夏季,蒙古栎红松林>椴树红松林>白桦人工林;秋季,椴树红松林>蒙古栎红松林>白桦人工林;冬季,椴树红松林>蒙古栎红松林>白桦人工林。微生物多样性指数随土层深度变化表现为:物种丰富度指数(SW)、物种优势度指数(SP)和群落物种均匀度指数(McIntosh)均以蒙古栎红松林最高,且显著高于白桦人工林。由此可见,原始阔叶红松林较人工林土壤相比具有更丰富的微生物多样性。

Taking Xiaoxing＇anling as the research object, the soil microbial diversity of herb layer in 3 types of Broad-leaved Korean Pine Forests was studied by using BIOLOG method. The results showed that, the trend of the Average well color development （AWCD） value was different in different season, and the order was as following： Quercus mongolica Pine Forest〉Tilia arnurensis Rupr Pine Forest〉Betu- la platyphylla Suk Pine Forest in spring; Q. rnongolica Pine Forest〉T. arnurensis Rupr Pine Forest〉 B. platyphylla Suk Pine Forest in summer; T. arnurensis Rupr Pine Forest〉Q. mongolica Pine Forest〉 B. platyphylla Suk Pine Forest in autumn; T. amurensis Rupr Pine Forest〉Q. rnongolica Pine Forest〉 B. platyphylla Suk Pine Forest in winter. Microbial diversity indexes varied with soil depths： species rich- ness index （SW）, species dominance index（SP） and species evenness index（Mclntosh） of soil microbial diversity in Q. mongolica Pine Forest were highest, and significantly higher than that of B. platyphylla Suk Pine Forest. The conclusion can he like that, microbial diversity of herb layer in Primary Broad-- leaved Korean Pine Forests is richer than that in Larch Pure Forest.