摘要:
以福建省6个县14个不同水稻田土壤为材料,通过常规方法测定其养分状况与微生物数量,比较冷浸田与非冷浸田土壤特征的差异。结果表明:(1)冷浸田与非冷浸田相比,有机质含量、有效P含量、0~20 cm土层真菌数量差异均达显著水平,冷浸田有机质含量较高,有效P含量和0~20 cm土层真菌数量较低。(2)冷浸田土壤中细菌、真菌和放线菌三者之间无显著相关性,而非冷浸田土壤三者间均呈明显的正相关。(3)土壤真菌与土壤有机质呈显著负相关,与有效P呈显著正相关;放线菌与有效P呈显著正相关;土壤真菌、放线菌数量随着土层的加深显著减少;与细菌相比,土壤真菌和放线菌更易受到土壤理化因子的影响。
关键词:
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土壤 /
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冷浸田 /
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有机质 /
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有效磷 /
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微生物
Abstract:
The microorganism population and nutrient contents of 14 soil samle collected from different paddy fields in 6 counties of Fujian Province were examined based on classical methods. The differences of fundamental natures between cold-waterlogged paddy soil (CWPS) distinguished and non-cold-waterlogged paddy soil (NCWPS) were also investigated. The results showed that (1) significant differences in some soil properties were detected between CWPS and NCWPS, including organic matter (OM) content, available P (AP) content and fungus number in the 0-20 cm soil layer. Compared with NCWPS, CWPS had more OM content, less AP content and fungus number in the 0-20 cm soil layer; (2) there are significant and positive correlations between bacterium, fungus and antinomycete number in NCWPS, but not in CWPS; (3) fungus number were negatively correlated with organic matter content and positively correlated with available P content, and antinomycete number were positively correlated with available P content. The number of fungus and antinomycete in soil significantly decreased with increase of soil depth. Compared with bacterium, fungus and antinomycete were easily influenced by soil physicochemical factors.
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