A Primary Investigation of Microorganism Population in Different Types of Tobacco Planting Soils
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摘要: 试验研究了皖南烟区4种不同植烟土壤类型（河滩地砂壤土、冲积砂壤土、水稻黏性土壤、冲积粉砂土）在烟叶生长期内的微生物种类、数量变化情况。结果表明，在根际及非根际土壤中，4种类型土壤中所含微生物种类都是以细菌、放线菌、真菌为主，占微生物总量的95%以上。在烟叶整个生育期，根际土壤中微生物总量大于非根际土壤。不同生态环境下，根际及非根际土壤中各类微生物数量及多样性指数各不相同，多种微生物数量与土壤养分含量呈正相关关系。Abstract: An experiment was carried out in southern Anhui province to study the types and population of soil microorganism during life cycle of tobacco growing under four types of soil systems (sandy soil on river beach, alluvium fine sandy soil, paddy clay soil, and alluviun sandy soil). The major results showed that both in rhizosphere and non-rhizosphere soils, the bacteria, fungi and actinomycetes were the major types of soil organisms, which were more than 95% of the total soil organisms. During the whole growth cycle of flue-cured tobacco plant, the microorganism population in rhizosphere soil was higher than in non-rhizosphere soil, the differences in population and diversity index of each soil microorganism were observed in different ecological conditions, and in most of case, there was a positive correlation between the soil microorganism population and soil nutrient contents.
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Keywords:
- soil type /
- tobacco /
- microorganism population /
- microorganism diversity
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