【摘要】 为筛选出适宜晋东南山区谷子的最佳轮作模式，本研究设置谷子-玉米-大豆-谷子(SZGm)、谷子-玉米-高粱-谷子(SZSb)、谷子-玉米-花生-谷子(SZAh)、谷子-玉米-甘薯-谷子(SZLb)、谷子-玉米-马铃薯-谷子(SZSt)、谷子-玉米-玉米(糯)-谷子(SZZm)、谷子连作(SSSi)7个处理，以谷子连作为对照，用Illumina Miseq高通量测序技术对土壤细菌进行土壤微生物群落结构、多样性分析，同时测定土壤的理化性质和肥力变化。结果表明，轮作可以降低土壤容重，改变土壤团聚体径粒组成和稳定性，影响土壤肥力。细菌群落结构分析结果显示，Proteobacteria、Actinobacteria为优势菌门，且7个处理具有相似的群落组成，但在比例上存在一定差异。细菌多样性分析结果表明，不同轮作模式会改变土壤微生物群落结构。综合土壤物理、肥力指标的主成分分析(PCA)结果，7个轮作模式处理综合得分从高到低为SZZm>SSSi>SZSb>SZGm>SZLb>SZAh>SZSt。因此，认为谷子-玉米-玉米(糯)-谷子是使土壤保持健康生态的最佳轮作模式。更多还原

【Abstract】 In order to screen out the best rotation mode suitable for millet in the mountainous area of southeastern Shanxi, seven treatments were set up, namely millet-maize-soybean-millet(SZGm), millet-maize-sorghum-millet(SZSb), millet-maize-peanut-millet(SZAh), millet-maize-sweet potato-millet(SZLb), millet-maize-potato-millet(SZSt), millet-maize-maize(waxy)-millet(SZZm) and millet continuous cropping(SSSi), with millet continuous cropping as control. The soil microbial community structure and diversity were analyzed by Illumina Miseq high-throughput sequencing technology. At the same time, the changes of soil physicochemical properties and fertility were measured. The results showed that rotation could reduce soil bulk density, change the particle size and stability of soil aggregates, and influence soil fertility. The results of bacterial community structure showed that Proteobacteria and Actinobacteria were the dominant phyla. The seven treatments had similar community composition, but there were some differences in proportion. The bacterial diversity results indicated that different rotation patterns could change the microbial community structure in soil. Based on the principal component analysis(PCA) results of soil physical and fertility indicators, the comprehensive scores of the seven treatments from high to low were SZZm>SSSi>SZSb>SZGm>SZLb>SZAh>SZSt. Therefore, it is considered that millet-maize-maize(waxy)-millet is the best rotation mode to keep the soil healthy and ecological.更多还原