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以中国科学院海伦农业生态实验站为平台,研究了不同作物(大豆、小麦和玉米)根系对根际微生物种群(细菌、真菌和放线菌)组成和数量的影响。结果表明:3种作物根际微生物数量均表现为细菌的数量显著多于放线菌和真菌的数量,作物之间的微生物总数量多少表现为大豆>小麦>玉米,各作物间差异显著(P<0.05)。根际三大微生物种群的变化情况为真菌、放线菌数量的变化趋势相同,均表现为大豆>玉米>小麦,细菌数量的变化情况为大豆>小麦>玉米。不同施肥处理中,玉米根际微生物总数变化情况为NPK>NK>PK>CK,且施NK和NPK处理极显著增加根际微生物数量(P<0.01),增幅为54.9%和243.2%;NK处理下,大豆根际真菌数量表现为显著性降低(P<0.05),而细菌显著性增加(P<0.05);小麦根际微生物数量在NK处理下极显著增加,增幅为64.9%(P<0.01)。图4,表2,参19。
The effects of different crop (soybean, wheat and maize) root systems on the composition and quantity of rhizospheric microbial population (bacteria, fungi and actinomycetes) were studied using the Helen Agricultural Ecology Experiment Station of the Chinese Academy of Sciences as a platform. The results showed that the number of rhizosphere microbes in all three crops was significantly higher than that of actinomycetes and fungi. The total number of microbes in crops showed soybean> wheat> corn with significant difference (P <0.05). The changes of the three rhizosphere microorganisms were fungi and actinomycetes. The change trend of the quantity of actinomycetes was the same, which showed that soybean> corn> wheat. The change of bacteria quantity was soybean> wheat> corn. In different fertilization treatments, the total number of rhizosphere microbes in maize changed as NPK> NK> PK> CK, and NK and NPK significantly increased the number of rhizosphere microbes (54.9% and 243.2%, respectively) (P <0.05). The number of rhizosphere microbes in rhizosphere soil significantly increased (P <0.05), and the bacterial population increased significantly (P <0.05) ). Figure 4, Table 2, Reference 19.