a hypothetical organic phenomenon by which living organisms are created from nonliving matter 同义词：abiogenesis, autogeny, spontaneous generation,
例句与用法
1.
Seven plots selected from wanglang reserve were distributed in different types of forest and at different altitude , and different plot has different microclimate . soil property , microbial population , soil nutrient content of forest soil were determined in wanglang natural reserve , from may to october 2002 to july 2003 , the ecological distribution of three main groups , bacteria , actinomycete and fungi were determined in the forest soils by the cell enumeration methods . six kinds of physiological groups , including ammoniation bacteria , nitrification bacteria , nitrosification bacteria , aerobic autogenesis azotobacter , aerobic cellulose - decomposing bacteria and anaerobic cellulose - decomposing bacteria were enumerated by the most - probable number ( mpn ) 2001年10月在王朗自然保护区内设立了3个定位研究样地和4个临时样地，通过多次现场采样与室内实验分析，测定了白桦林、岷江冷杉林、紫果云杉林、绣线菊-羊茅群落、羊茅群落及高山柳灌木丛等6种不同植物群落内土壤微生物三大类群数量、功能微生物数量、土壤养分，并在固定样地内使用埋袋法进行了三个埋藏深度的凋落物分解袋试验，初步研究了枝条、阔叶、针叶等凋落物组分在不同分解阶段所含养分的动态变化。
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